powersoft M30D User manual

Keep This Manual For Future Reference
© 2012 - 2013 Powersoft
powersoft_MSeries_uguide_en_v2.6
user guide
M Series ampliers
DO000100
REV 1.1 August 2013
M30D / M30D HDSP+ETH
M20D / M20D HDSP+ETH
M14D / M14D HDSP+ETH
M50Q / M50Q HDSP+ETH
M28Q / M28Q HDSP+ETH
TEMP
READY
SIGNAL
-18dB
6dB
CLIP
dB
+32
8
-
dB
+32
8
-

Table of contents
1 Important safety instructions 4
2 Precautions regarding installation 4
2.1 Location 4
2.2 Wiring 5
2.3 Speaker damage 5
3 Mechanical drawings 6
4 Interfaces 7
5 Welcome 9
6 The M Series 9
6.1 More sound and less weight 9
7 Installation 9
7.1 Unpacking 9
7.2 Mounting 10
7.3 Cooling 10
7.4 Operating precautions 10
7.5 Grounding 10
7.6 AC mains connection 10
8 Connections and Operation 10
8.1 Front panel air lters access 10
8.2 Front panel adjustments 11
8.3 Front panel monitoring 11
8.4 Connecting audio inputs 11
8.4.1 MxxD models 11
8.4.2 MxxQ models 11
8.5 Connecting audio outputs 11
8.5.1 Lo-Z and 70V/100V operations 11
8.5.2 Bridge Mode Connection 11
9 M Series HDSP+ETH operation 12
9.1 Rear Panel LEDs 12
9.2 Ethernet port and remote ID selection 12
9.3 V Ext 12
9.4 DSP features and operations 12
9.4.1 DSP Features 12
9.4.2 Input routing selection and internal signal route13
9.4.3 Input section 13
9.4.4 Output section 13
9.5 Internal processing layout 13
9.5.1 Input routing 13
9.5.2 Input section 13
9.5.3 Output section 13
9.6 Locking 14
9.7 On/Off 14
9.8 Preset Management 14
10 Remote control 14
10.1 Networking 14
10.1.1 Discovery device 14
10.1.2 DHCP 14
10.1.3 AUTOIP 15
10.1.4 Static IP 15
10.1.5 Revert from static IP 15
10.2 Setup device 16
10.2.1 Virtual device 16
10.2.2 Congure layout 16
10.2.3 Real device 16
10.3 File operations 17
10.3.1 Binary preset le .preset 17
10.4 Input/output curves .icp, .ocp 17
10.5 Channel preset .chp 17
10.6 Device preset le .pam 18
10.7 System File .paw 18
10.8 DSP remote operations 18
10.8.1 Routing 18
10.8.2 Input eq 18
10.8.3 Output eq 19
2

M Series
User Guide
10.8.4 Limiters 19
10.8.5 RMS limiter 19
10.8.6 Peak limiter 19
10.8.7 Damping factor correction 19
10.9 Locking 20
10.10 On board preset operations 20
10.11 Copy and paste operations 21
10.12 Input/output eq curves 21
10.13 Channels 21
10.14 Workspace 21
11 Protection 21
11.1 Turn on/Turn off muting 21
11.2 Short circuit protection 21
11.3 Thermal protection 21
11.4 Thermal warning 22
11.5 Thermal shutdown 22
11.6 DC fault protection 22
11.7 Input/output protection 22
12 User Maintenance 22
12.1 Cleaning 22
12.2 Service 22
12.3 Dust Removal 22
13 Warranty 22
13.1 Product warranty 22
13.2 Return of Goods 22
13.3 Repair or replacement 22
13.4 Cost and responsibility of transport 22
14 Assistance 23
15 M Series power rating 24
16 Output SpeakON connection polarities 24
17 M Series load compatibility chart 24
18 Specications 25
M14D and M14D HDSP+ETH 25
M20D and M20D HDSP+ETH 26
M30D and M30D HDSP+ETH 27
M28Q and M28Q HDSP+ETH 28
M50Q and M50Q HDSP+ETH 29
Annex A: IP management and recovery 30
A.1.1 Reset IP conguration 30
3

1 Important safety instructions
CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK,
DO NOT ATTEMPT TO OPEN ANY PART OF THE UNIT. NO
USER-SERVICEABLE PARTS INSIDE. REFER SERVICING TO
QUALIFIED SERVICE PERSONNEL.
WARNING: TO REDUCE THE RISK OF FIRE OR ELECTRIC
SHOCK, DO NOT EXPOSE THIS APPARATUS TO RAIN OR
MOISTURE. OBJECTS FILLED WITH LIQUIDS, SUCH AS VAS-
ES, SHOULD NOT BE PLACED ON THIS APPARATUS.
TO COMPLETELY DISCONNECT THIS APPARATUS FROM
THE AC MAINS, DISCONNECT THE POWER SUPPLY CORD
PLUG FROM THE AC RECEPTACLE.
THE MAINS PLUG OF THE POWER SUPPLY CORD MUST
REMAIN READILY ACCESSIBLE.
SAFEGUARDS: This unit has been engineered and manufactured
to assure your personal safety. Improper use can result in potential
electrical shock or re hazards. In order not to defeat the safe-
guards, observe the following instructions for its installation, use
and servicing.
fRead these instructions.
fKeep these instructions.
fHeed all warnings.
fFollow all instructions.
fDo not use this amplier near water.
fClean only with a dry cloth.
fEnsure a proper ventilation.
fInstall in accordance with Powersoft’s instructions.
fDo not install near any heat sources or apparatus that
produce heat.
fProtect the power cord from being walked on or pinched
particularly at plugs, convenience receptacles, and the point
where they exit from the apparatus.
fDo not defeat the safety purpose of the polarized or
grounding-type plug. A polarized plug has two blades with
one wider than the other. A grounding type plug has two
blades and a third grounding prong. The wide blade or the
third prong are provided for your safety. If the provided
plug does not t into your outlet, consult an electrician for
replacement of the obsolete outlet.
fUnplug this amplier during lightning storms or when unused
for long periods of time.
fContact the authorized service center for ordinary and
extraordinary maintenance.
fOnly use attachments/accessories specied by Powersoft.
NOTES: This equipment has been tested and found to comply
by Competent Body (Directive 2004/108 /EC) pursuant to the
product family standard for audio professional use: EN 55103-1
and EN 55103-2 standard.
This equipment has been tested and found to comply by Notied
Body 2014 (Directive 2006 / 95/ EC) pursuant to the audio appa-
ratus safety requirements: EN 60065 and EN 6006/A1 standard.
EXPLANATIONS OF GRAPHICAL SYMBOLS
The Lightning Flash with arrowhead symbol within an
equilateral triangle is intended to alert the user to the
presence of uninsulated “dangerous voltage” within the
product enclosure that may be of sufcient magnitude to
constitute a risk of shock to persons.
The Exclamation Point within an equilateral triangle is
intended to alert the user to the presence of important
operating and maintenance (servicing) instructions in the
literature accompanying the product.
2 Precautions regarding installation
2.1 Location
Install the amplier in a well-ventilated location where it
will not be exposed to high temperature or humidity.
Do not install the amplier in a location that is exposed to direct
sun rays, or near hot appliances or radiators. Excessive heat can
adversely affect the cabinet and internal components. Installation
of the amplier in a damp or dusty environment may result in
malfunction or accident.
Placing and using the amplier for long periods of time on
heat generating sources will affect its performance. Avoid
placing the amplier on heat generating sources. Install this am-
plier as far as possible from tuners and TV sets. An amplier
installed in close proximity of such equipment may experience
noise or generic performance degradation.
No naked ame sources such as lighted candles should be
placed on the amplier.
Do not spill water or other liquids into or on the amplier.
WARNING
To prevent re or electric shock:
fThe ventilation openings must not be impeded by any item
such as newspapers, tablecloths, curtains etc; keep a distance
of at least 50 cm from the front and rear ventilation openings
of the amplier.
fDo not expose this amplier to rain or moisture.
fThis equipment must not be exposed to dripping or splashing
liquids: objects lled with liquids, such as vases, must not be
placed on the amplier.
4
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
!

2.2 Wiring
This device must be powered exclusively by earth con-
nected mains sockets in electrical networks compliant to
the IEC 364 or similar rules. It is absolutely necessary to verify this
fundamental requirement of safety and, in case of doubt, require
an accurate check by qualied personnel.
POWERSOFT cannot be considered responsible for eventual
damages caused to persons, things or data due to an improper
or missing ground connection.
fBefore powering this amplier, verify that the correct voltage
rating is being used.
fVerify that your mains connection is capable of satisfying the
power ratings of the device.
fDo not use this ampliler if the electrical power cord is frayed
or broken.
fDo not remove the cover. Failing to do so will expose you to
potentially dangerous voltage.
fProvide a sectioning breaker between the mains connections
and the amplier. The suggested device is a 16A/250V AC, C
or D curve, 10 kA.
fSwitching mode amplier is capable of producing hazardous
output voltages. To avoid electrical shock, do not touch any
exposed speaker wiring while the amplier is operating.
2.3 Speaker damage
Powersoft switching mode ampliers are among the most
powerful professional ampliers available and are capable
of producing much more power than many loudspeakers can han-
dle. It is the user’s responsibility to use speakers suitable to the
amplier and to use them in a sensible way that will not cause
damage.
Powersoft will not be held responsible for damaged speakers.
Consult the speaker manufacturer for power handling recom-
mendations.
Even if you reduce the output volume using the amplier’s
front panel attenuation controls, it is still possible to reach full
output power if the input signal level is high enough.
A single high-power tone can damage high frequency drivers
almost instantaneously, while low frequency drivers can usually
withstand very high, continuous power levels for a few seconds
before they fail. Reduce power immediately if you hear any
speaker “bottoming out”: harsh pops or cracking distortion that
indicate that the speaker voice coil or diaphragm is striking the
magnet assembly.
Powersoft recommends that you use ampliers in this power
range for more headroom (cleaner sound) rather than for in-
creased volume.
This manual contains important information on operating your
Powersoft amplier correctly and safely. Please read it carefully
before operating your amplier. If you have any questions, con-
tact your Powersoft dealer.
5

3 Mechanical drawings
482
337,3
44,1
437,6
379,5
FIGURE 1: M Series mechanical drawing. All dimensions in millimiters.
6

7
4 Interfaces
1. Channel 1 input attenuator
2. Channel 1 meter LEDs
3. Channel 2 meter LEDs
4. Channel 2 input attenuator
5. On/off power switch
6. Channels 1&2 ready LED
7. Channels 1&2 temperature warning LED
8. AC mains power plug
9. Air vents
10. Channels 1&2 line output XLR connector
11. Channels 1&2 line input XLR connector
12. Channel 2 output Speakon connector
13. Link switch channels 1-2
14. Channel 1 output Speakon connector
15. Amplier’s remote ID selector
16. Preset LEDs
17. Preset selector button
18. AUX supply plug
19. Ethernet port
FIGURE 2: M Series – MxxD front panel view.
PAT. PEND.
Made in Italy
FIGURE 3: M Series – MxxD (non HDSP+ETH) rear panel view.
PAT. PEND.
Made in Italy
0 5
9
4
8
3
7
2
6
1
0
5
9
4
8
3
7
2
6
1
FIGURE 4: M Series
HDSP+ETH
rear panel view.
1 2 3 4
6 7
5
8
13 14
15 16 17 18 19
910 11
12

1. Channel 1 input attenuator
2. Channel 1 meter LEDs
3. Channel 2 meter LEDs
4. Channel 2 input attenuator
5. On/off power switch
6. Channels 1&2 ready LED
7. Channels 1&2 temperature warning LED
8. AC mains power plug
9. Air vents
10. Channels 3&4 line input XLR connector
11. Channels 1&2 line input XLR connector
12. Channel 4 output Speakon connector
13. Link switch channels 3-4
14. Channel 3 output Speakon connector
15. Channel 2 output Speakon connector
16. Link switch channels 1-2
17. Channel 1 output Speakon connector
18. Amplier’s remote ID selector
19. Preset LEDs
20. Preset selector button channels 3&4
21. Preset selector button channels 1&2
22. AUX supply plug
23. Ethernet port
TEMP
READY
SIGNAL
-18dB
6dB
CLIP
dB
+32
8
-
dB
+32
8
-
FIGURE 5: M Series – MxxQ front panel view.
PAT. PEND.
Made in Italy
FIGURE 6: M Series – MxxQ (non HDSP+ETH) rear panel view.
PAT. PEND.
Made in Italy
0 5
9
4
8
3
7
2
6
1
0
5
9
4
8
3
7
2
6
1
FIGURE 7: M Series
HDSP+ETH
rear panel view.
8
1 2 3 4
6 7
5
8
1613 1714
18 2019 21 22 23
910 11
1512

M Series
User Guide
5 Welcome
Congratulations on buying a Powersoft M Series amplier!
Powersoft is a leading company in the eld of high efciency
audio power management. The Powersoft Class D technology
has changed the way the world looks at professional audio
amplication: no other amplier’s performance comes close for
applications demanding high power and long term reliability.
Thanks to amazing reductions in heat output and weight, without
sacricing output powers, Powersoft ampliers can be used in an
unlimited range of PA applications such as opera houses, theaters,
churches, cinema, and theme parks.
6 The M Series
M Series ampliers are specically designed for touring and live
applications. The ampliers in this series offer smaller dimensions,
lighter weight and the traditionally amazing sound quality and
reliability of all Powersoft products. M Series ampliers have
power ratings suitable for a vast range of common applications
including 70V/100V distributed line systems.
6.1 More sound and less weight
Switching mode technology based ampliers are highly
efcient, delivering greater power to speakers with reduced heat
dissipation: typical running efciency of output stages is 95%, with
only 5% of input energy dissipated as heat. This allows for smaller
dimensions, weight and power consumptions.
Contrary to conventional ampliers which achieve highest
efciency only at full rated power output, Class D efciency is
almost independent of output level. Music has an average power
density of 40% of its peak value; this means that other (non-
class D) ampliers can easily generate 10 times more heat than
Powersoft products for the same sound pressure level.
The units in the M Series are designed to work with lo-Z (from
4 �) and with 70V/100V distributed lines. They can deliver up to
1500 W per channel (at 4 �) or 3000 W in bridge mode on 8 �.
The HDSP+ETH versions of all ampliers in this series allow single
channel processing and remote control capabilities.
Powersoft ampliers deliver crystal-clear highs, and a tight,
well-dened low end: the most accurate reproduction of an audio
signal. Solid time proven design features ensure extremely high
performance in terms of super low total harmonic distortion,
optimal frequency response, high power bandwidth and damping
factor across a vast number of application scenarios. Powersoft’s
multi patented application of Pulse Width Modulation (PWM)
high frequency sampling techniques is just one of the many factors
contributing to the M Series’ high performance ratings across the
audio bandwidth.
The M Series offers complete protection against any possible
operation error. Every amplier in this series is designed to work
under a large range of possible conditions, delivering maximum
power with maximum safety and an outstanding long term
reliability. Anticipating potential problems at the design stage
means your show always goes on!
7 Installation
7.1 Unpacking
Carefully open the shipping carton and check for any noticeable
damage; the FIGURE 8 shows the packing view. Every Powersoft
amplier is completely tested and inspected before leaving the
factory and should arrive in pristine condition. In the unlikely event
that you should encounter any damage, please notify the shipping
company immediately. Be sure to save all packing materials for the
carrier’s inspection.
Every M Series amplier box contains the following:
f1 M Series amplier.
f1 x AC Mains cord with 3-pin plug 15 A for US or
IEC ‘Schuko’ 16 A for every other nation.
f1 x User Guide.
manual
amplifier
mains cable
FIGURE 8: M Series package.
9

7.2 Mounting
All Powersoft ampliers are designed for standard 19” rack
mounting with four front panel holes and two rear-lateral holes. In
order to limit the risk of mechanical damages, ampliers must be
xed to the rack using both frontal as well as rear mounting holes
(see FIGURE 9).
7.3 Cooling
All Powersoft ampliers implement a forced-air cooling system
to maintain low and constant operating temperatures. Drawn by
an internal fan, air enters through the slots in the front panel and
is forced over all components, exiting at the back of the amplier.
The amplier’s cooling system features an “intelligent” variable-
speed DC fan which is controlled by heat sink temperature sensing
circuits: the fan speed will increase only when the temperature
recorded by the sensors rises over carefully predetermined values.
This ensures that fan noise and internal dust accumulation are kept
to a strict minimum. Should however the amplier be subject to
an extreme thermal load, the fan will force a very large volume
of air through the heat sink. In the extremely rare event that the
amplier should dangerously overheat, sensing circuits shut down
all channels until the amplier cools down to a safe operating
temperature. Normal operation is resumed automatically without
the need for user intervention.
Caution regarding heat escape should be exercised when
mounting M Series ampliers. Exhaust cooling air is forced out
through the rear of the chassis (see FIGURE 9); make sure there
is enough space around the back of the amplier for this air to
escape. M Series ampliers can be stacked one on top of the other
due to the efcient cooling system they are equipped with. There
is however a safety limit to be observed: in case a rack with closed
back panels is used, leave one rack unit empty every four installed
ampliers to guarantee adequate air ow.
7.4 Operating precautions
Make sure the power switch is off before attempting to make
any input or output connections.
Make sure the AC mains voltage used is within the acceptable
operating voltage range specied in the M Series documentation
(factory selected 115 V / 230 V ±15%), depending on your country
mains standard. Damage caused by connecting the amplier to an
improper AC mains voltage is not covered by the warranty.
By using good quality input and speaker cables, the likelihood
of erratic signal behavior is reduced to a minimum. Whether you
make them or buy them, look for good quality wires, connectors
and soldering techniques.
7.5 Grounding
There is no ground switch or terminal on the M Series ampliers.
All shield terminals of input connections are directly connected to
the chassis. This means that the unit’s signal grounding system is
automatic. In order to limit hum and/or interference entering the
signal path, use balanced input connections.
In the interests of safety, the unit MUST always operate with
electrical safety earth connected to the chassis via the dedicated
wire in the 3-wire cable. Never disconnect the ground pin on the
AC mains power cord.
7.6 AC mains connection
The AC Mains connection is made via the IEC type connector
on the back of the amplier. Please make sure your AC mains
power source operates within the voltage limits indicated on this
manual (factory selected 115 V / 230 V ±15%).
Safety warning!
Ground wires must be connected!
Do not use adapters that disable grounding.
8 Connections and Operation
This section provides information on amplier connection and
operation. For optimal amplier performance, it is important to
understand the meaning of the information that each M Series
amplier can provide regarding its status and conguration. This
information is available to the user via front panel indicators as well
as through specic LEDs the back of the unit (for HDSP versions
only). This chapter will break down all the front panel and back
panel functions. The remaining part of the chapter will explain
how to correctly connect the amplier’s inputs and outputs.
8.1 Front panel air lters access
The blue front panel of all M Series ampliers can be removed
to access the air lters. This is useful when the air lters need to
be cleaned due to dust accumulating and clogging the lters thus
hindering proper air circulation vital for cooling purposes.
air flow
mounting
holes
brackets
FIGURE 9: M Series air ow.
open the lock and
insert the plug lock the plug
FIGURE 10: AC mains plug connection.
10

To take off the blue colored front panel, remove the two
screws highlighted in with a Philips screwdriver. The panel will
easily separate from the amplier exposing the sponge-like air
lters.
Before replacing the front panel, remember to reposition the
air lter on the chassis by placing it on its designated area, then
reposition and tighten the two frontal screws.
8.2 Front panel adjustments
The front panel of all M Series ampliers has one
stepped attenuation pot for each channel. Turning the pot
counterclockwise, the user can modify the level of the input
signal in steps corresponding to a gain reduction ranging in:
-∞, 4, 14, 18, 20, 22, 24, 26, 28, 30, 32 dB.
8.3 Front panel monitoring
The M Series front panel provides important information on
the state of the amplier. It is important to know and understand
the meaning of every front panel indicator LED in order to have
crucial information on the amplier status.
There are two sets of LEDs on the M Series front panel:
channel indicators and status indicators. Channel indicators: each
channel has its own column set of 4 LEDs. The top LED is red, and
the following three are green. Status indicators: each channel pair
has one set of two green status indicator LEDs.
The function of both families of LEDs is summarized in TABLE 1.
Channel indicators
LED Color Solid ON Label
RED
Channel output level has
reached clipping limits
OR
Short circuit protection has
been engaged
CLIP
GREEN Channel output level is above
-6 dB of max output level -6 dB
GREEN Channel output level is above
-18 dB of max output level -18 dB
GREEN Input signal presence SIGNAL
Status indicators
LED Color Solid ON Label
GREEN Channel is ready READY
YELLOW Output power is being reduced due to heat sink
temperature exceeding 75° C*TEMP
* Should the temperature exceeds 85° C, the LED will stay on and the channel will be muted.
The amplier will resume normal functioning and the LED will turn off automatically when the
temperature falls below 75° C.
TABLE 1: M Series LEDs chart.
8.4 Connecting audio inputs
8.4.1 MxxD models
Audio input connections are made via two XLR connectors
found on the rear of the amplier. Signal looping (i.e. link thru) is
possible using the two XLR male connectors which are also found
on the back panel. The Link on/off button allows to connect input
channels 1 and 2 in parallel.
8.4.2 MxxQ models
Audio input connections are made via four XLR connectors
found on the rear of the amplier. Signal looping (i.e. link thru) is
possible using the two XLR male connectors which are also found
on the back panel. The Link on/off buttons allows to connect input
channels 1 and 2 (and/or channels 3 and 4) in parallel.
8.5 Connecting audio outputs
WARNING!
Lethal voltage levels may be present at the loudspeaker
connectors when the amp is turned on!
All output connections are made via speakON connectors.
Both bridge as well as single channel output connection modes
are available. In the single channel mode wiring, the 1+ pin of the
connector corresponds to the positive output of the channel, the
1– to ground (see FIGURE 13); for bridge mode refer to Section
8.5.2.
All 4 channel amplier (MxxQ) manage bridge and single
channel mixed conguration; for example, channels 1 and 2 can
be set in bridge mode, and channels 3 and 4 single-ended.
M Series ampliers are designed to be connected both to lo-Z
loudspeakers as well as hi-Z, 70V / 100V distributed lines directly.
8.5.1 Lo-Z and 70V/100V operations
High impedance loudspeakers can be paralleled in 70V/100V
distributed lines and directly managed by the M Series ampliers.
High output voltage per channel of M20D, M30D and M50Q
ampliers guarantees direct connection to hi-Z loudspeakers in a
line (see FIGURE 13).
8.5.2 Bridge Mode Connection
Bridge mode connection of outputs is possible only in lo-Z
operational mode. Bridging of adjacent channels is possible for the
following pairs: channels 1 with 2 for all models and channels 3
with 4 for MxxQ models. Bridging is NOT possible for other pairs,
for example channels 1 and 3.
TEMP
READY
SIGNAL
-18dB
6dB
CLIP
dB
+32
8
-
dB
+32
8
-
FIGURE 11: Unscrew and remove the front panel.
1
GND
Balanced input Unbalanced input
COLD –
HOT +
2
3
1
GND
HOT +
2
3
FIGURE 12: Balanced and unbalanced input XLR connections.
11

In order to set the output in bridge mode:
fparallel the input by pressing on the link button;
fconnect the loudspeaker to just one speakON: 2+ pin is the
positive and the 2– the negative;
fminimum load impedance shall be 8�.
9 M Series HDSP+ETH operation
9.1 Rear Panel LEDs
The rear panel of the M Series with optional HDSP has a
4-green-LED column per channel pair. The LED lights to indicate
which preset is active for that specic channel pair. Preset
parameters are dened, set and modied by connecting the M
Series amplier with the optional HDSP to a computer running the
Armonía Pro Audio Suite. In case of a 4-channel amplier (MxxQ
models), the rst LED column indicates the selected preset active
on channels 1 and 2, while the second column refers to the preset
selected for channels 3 and 4. A signal can be sent remotely to the
amp to force all preset LEDs to blink for 30 s; this can be useful in
a situation where many ampliers are networked together and it
is necessary to identify which amplier corresponds to a particular
network address.
9.2 Ethernet port and remote ID selection
The ID selection doesn’t implement a communication function
but is necessary in order to recognize the ID of the amplier when
remotely connected. This two digits number is set via the encoders
by choosing tens digits through the left hand rotary selector and
unit digit through the right hand rotary selector.
ID number 00 is not allowed.
9.3 V Ext
The “V Ext” plug, located on the rear panel of M HDSP Series
ampliers, is used to supply the amplier’s internal Ethernet
controller with the minimum power required for remote on/off
switching operations. When the V Ext port is powered by an
external 9 V – 12 V DC (900 mA) power supply, the Ethernet
controller is enabled to listen for incoming connections such as
device power-on commands.
9.4 DSP features and operations
The main purpose of Digital Signal Processing (DSP) operations
is to allow the end user to program signal handling and processing
in order to:
fSelect and handle the source signal;
fProcess the signal for system operationM
fProcess the signal to improve multi way speaker sound quality
and protect speaker drivers.
Furthermore, the DSP allows access to real-time information
on the internal device operation. This provides the end user with
reliable information on the internal state of the device as well as
better and faster amplier response in terms of control.
9.4.1 DSP Features
The M Series amplier HDSP is based on the DSP-D board
platform and the Analog Device ADAU 1701.
The DSP-D board’s exible design caters a wide range of users:
from the speaker manufacturer to the end user of rack ampliers.
The DSP-D provides both a completely programmable DSP to the
1+
2+
1–
2–
1+
2+
1–
2–
1+
2+
1–
2–
Single channel mode
speakON
connector
Channel 1
speakON
connector
speakON
connector
Biamp
CH1
CH2
Bridge mode
FIGURE 13: Loudspeaker wiring;
a) single channel mode, low impedance loudspeaker;
b) single channel biamplied w/ active crossover: CH1 high, CH2 low;
c) bridge mode.
PAT. PEND.
Made in Italy
0 5
9
4
8
3
7
2
6
1
0
5
9
4
8
3
7
2
6
1
FIGURE 14: Ethernet port ID selector and VExt plug.
12
a
b
c

experienced user as well as a complete tool with remote control
for the end user. The ADAU 1701 device is a xed point DSP
with 28-bit resolution for the internal path and 56-bit for internal
processing. The board also provides full remote control through
Armonía Pro Audio Suite.
The M Series DSP is modular for any channel pair, meaning,
for example, that on a MxxD one module is available for channels
1 and 2 while on a MxxQ there are two modules available: one
for channels 1 and 2 and another for channels 3 and 4. Keep in
mind that the modules are physically separated, therefore input or
output from different modules can’t be mixed together.
9.4.2 Input routing selection and internal signal route
Due to the internal amplier structure, it is impossible to mix
signals from non adjacent channels: for example, channel 1 and 4
cannot be mixed together but only channels 1-2 and channels 3-4
(on MxxQ models) can. The following congurations are possible
for any channel pair:
f1 input – 2 outputs
f2 inputs – 2 outputs
f2 mixed inputs – 2 outputs
9.4.3 Input section
The input section allows system operation to improve sound
for a specic zone, group of speakers, room, etc. The input section
provides an input eq for any input channel with the following
features:
f5 biquad lters, any lter can become PEQ, shelving hi-lo
pass, all pass
fDelay: up to 170 ms for 2 in/2 out and up to 340 ms for 1
in/2 out congurations
fGain between -40 dB and 6 dB
fMute
fReverse polarity
9.4.4 Output section
The output section allows multiway cabinet equalization and
protection. The output section comprises an output eq and a
limiter (peak and RMS) for each channel.
fEq feature:
f12 biquad lters, any lter can become PEQ, shelving hi-lo
pass, all pass. The crossover functions are obtained using
one to four biquad lters for each crossover.
fDelay of 10 ms
fGain between -40 dB and 6 dB
fMute
fReverse polarity
fPeak limiter feature:
fThreshold, 20 – 135 V. With 1 V steps
fHold time, 0 – 2 sec. With 1 ms steps
fRelease time, 0 – 2 sec. With 1 ms steps
fRMS limiter feature:
fThreshold, 13 – 312 W @ 8 �. With 1 W steps
fAttack time, 2 – 4500 ms. With 1 ms steps
fHold time, 0 – 1 sec. With 1 ms steps
fRelease time, 4 – 4500 ms. With 1 ms steps
fTwo biquad lters for frequency shaping. Frequency
shaping is a function obtained by pre and post limiter eq.
The same eq (with opposite gain) is applied before and
after the limiter.
fDamping control:
fImpedance correction between -2 � to +2 � with 0.1 � steps.
9.5 Internal processing layout
The following two layouts are available for each module (and its
associated channel pair):
f1 In / 2 out basic layout
f2 In / 2 out basic layout with mono mix capabilities.
Due to the internal structure of the DSP, in order to optimize
performance, two different binary presets for 1 input / 2 output
congurations and for 2 input / 2 output congurations must be
used. Be aware that any change in the binary preset causes an
audio interruption while the M Series microprocessor loads the
preset data into the DSP. This means that a change in conguration
(e.g. going from 1 input to 2 inputs ) or reloading a preset from
the internal memory results in an audio interruption.
NOTE: The following information is valid for any single DSP
module (2 channels). Devices with 4 channels are formed by 2
completely independent modules.
9.5.1 Input routing
The two following congurations are available:
f1 In / 2 out, the input is routed from channel 1.
f2 In / 2 out, the input is routed from channel 1 and channel 2.
It is possible to mix the two signals together; the mono mix
function sums the two sources and halves their summed level.
9.5.2 Input section
The input section is formed by the input eq alone, one for
each channel of the loaded layout. For example, in the 1 input /
2 output module layout there is only 1 input eq for both output
channels. Every input eq has 5 biquadratic lters which can be
chosen and assigned from the set of standard IIR lters.
9.5.3 Output section
Every module provides each channel with a set of 12 biqaudratic
lters and a complete set of limiters for protection purposes:
fOutput eq: 12 biquad lters can be chosen for shaping (PEQ,
shelving, etc) but these are shared between the crossovers.
Each crossover can consume 1 to 4 biquad lters, depending
on the crossover slope. TABLE 2 and TABLE 3 illustrate
a number of crossover congurations. Mixed crossover
congurations are possible (e.g. HP 12 dB/oct, LP 24 dB/oct).
fPeak limiter for every output.
fRMS limiter for every output.
fFrequency shaping.
fDamping control for every output.
13

First crossover Slope
6/12 dB/oct
Slope 18/24
dB/oct
Slope 30/36
dB/oct
Slope 40/48
dB/oct
Free biQuad
lters remaining 11 10 9 8
TABLE 2: First crossover lters.
Second crossover Slope
6/12 dB/oct
Slope 18/24
dB/oct
Slope 30/36
dB/oct
Slope 40/48
dB/oct
Free biQuad
lters remaining 10 864
TABLE 3: Second crossover lters.
9.6 Locking
The locking mechanism allows to lock macro property values
based on the functional sub section and on the channel base of the
device; the lockable sub sections are:
fInput routing:
fMono mix
fInput Section:
fEqualizer
fOutput Section:
fEqualizer
fRMS Limiter
fPeak Limiter
fDamping Control
Every channel subsection is independently lockable.
9.7 On/Off
The on/off function is available when an external voltage is
supplied. Please refer to Section 9.3 for further information.
9.8 Preset Management
The DSP allows to manage up to 4 presets per module and its
associated channel pair. Each preset contains information on the
following:
fInput routing
fInput Section
fOutput Section
fProperties locking
The preset is handled by the client as a le with the .preset
extension.
These presets can be selected via a preset selection button
on the rear panel of the amp. There is one button for each DSP
module. The manual preset selection function is disabled if the
amplier is remotely controlled by any client.
Ampliers in the M Series are shipped with 4 default factory
presets: positions one and two store a 2 in / 2 out routing preset
each with an input delay of 170 ms. Positions three and four store
a 1 in / 2 out preset with 340 ms input delay each.
WARNING! Selecting a preset with a rear button or via
remote control will interrupt the audio stream
for some seconds.
WARNING! Store the modied preset before turning the unit
off or all changes will be lost.
NOTE: Selecting presets with the rear button is enabled only
if remote control is NOT active.
10 Remote control
The M Series HDSP+ETH boards allow full amplier remote
control with Powersoft’s software client Armonía Pro Audio Suite.
Other third party clients are also available.
Armonía Pro Audio Suite is a software environment entirely
developed in-house by Powersoft featuring full end user remote
control of Powersoft’s ampliers and audio signal processing. The
intuitive interface provides reliable information and real time
control of all DSP functions. Refer to the Armonía manual for
installation and conguration of the client software.
10.1 Networking
M Series HDSP+ETH ampliers come with one rear RJ45 port
for remote device communication, using the IP layer and the UDP
protocol. Factory default settings are DHCP/AutoIP, but a xed IP
policy can also be adopted.
10.1.1 Discovery device
In order to start remote
operation on the device
connected to your network,
it must be discovered and
imported into the Armonía
workspace.
It may happen that a static
IP in a different subnet with
respect to Armonía has been
assigned to your M Series amplier (i.e. 10.0.x.y versus 169.254.x.y):
if this is the case Armonía does not recognize the amplier. You
have to reset the IP conguration of your M Series amplier: see
Annex 1 for the right procedure.
10.1.2 DHCP
When the data cable is connected the amplier begins DHCP
handshaking. If a DHCP server is present on the network, the unit
is ready to be remotely controlled.
Input
Input
Signal
routing
input
eq
output
eq
peak lim.
rms lim.
damping
FIGURE 15: DSP internal layout.
14

10.1.3 AUTOIP
Every device tries to set up network communication when the
data cable is plugged in and connected to another device (PC,
switch, etc.). If a DHCP server is not active in the device network
the units initiates a stateless address auto-conguration. It self
assigns a link-local address of the type 169.254.x.y with a subnet
mask 255.255.0.0. Please make sure that your PC is in the same
subnet of the unit. Modern operating systems provide Zeroconf
features for network auto-conguration.
10.1.4 Static IP
M Series devices can be set up with a static IP (or any other IP
policy) with the Armonía control software. In order to set up the
IP address please follow these steps.
1. Connect the device in a network with or without DHCP (see
Section 10.1.2).
2. Discover the device and import it in the workspace (see
Section 10.1.1 or refer to the Armonía user guide).
3. Go to the device scheme tab and select the Network settings
button.
4. Select the Static addressing mode from the combo box.
5. Insert the desired IP Address and network mask. Specifying
the gateway is necessary only in complex LANs.
6. Click apply settings button.
WARNING! The device is reachable only from PCs in the same
subnet mask, if this information is lost you will need to re-init
the network device with a third-party software.
When done, the device network will restart automatically. The
device will reconnect in approximately 15 seconds.
10.1.5 Revert from static IP
If for any reason re-programming the IP address or the IP policy
of your unit should be necessary, follow the instructions in the
previous chapter and make a different selection when assigning
the IP. For example, should you need to revert the device to the
automatic (DHCP, Zeroconf) IP settings, please follow these
steps. Connect the device in a network with or without DHCP
(see Section 10.1.2).
1. Discover the device and import in the workspace (see Section
10.1.1 or refer to the Armonía user guide). Device and PC
must use the same subnet. If you are not able to reconnect
the device please refer to “Annex A: IP management and
recovery”.
2. Go to the device scheme tab and select the Network settings
button.
3. Select the Auto addressing mode from the combo box.
4. Click apply settings button.
When done, the device network will restart automatically.
The device will reconnect in approximately 15 seconds.
FIGURE 16: Push on the Network setting button.
FIGURE 17: Select the static IP policy.
FIGURE 18: Fill in the IP, subnet, and net mask.
FIGURE 19: Enter the network settings.
FIGURE 20: Select Auto addressing.
15

10.2 Setup device
There are two ways to congure the device, based on your
needs and on the availability of the real device. The main difference
is that you can either work with virtual devices before going online
and then send the setup to the units remotely or you can operate
on the physical unit directly.
10.2.1 Virtual device
If for some reason the devices are not available, conguration
must be carried out via virtual devices or a system of virtual
devices.
1. Select the device from the models
window
2. Drag and drop in the Workspace
3. If you already have a device preset
(.pam) you can import it by right
clicking on the device (see FIGURE
21).
4. You can modify any DSP value
following the instructions Section
10.8.
At this point you can save and
load the system le (.paw) at a later
time. Please refer to the Armonía
documentation. If the devices are ready
for remote control you can associate
the virtual device to the real device. To
do so, please follow the instructions in
the next section.
10.2.2 Congure layout
Virtual devices allow the use to
select the processing layout for any
single DSP module. Select the desired
layout in the preset tab of any virtual
device (see FIGURE 22).
10.2.3 Real device
Working on the real device remotely
is also possible. In this case all changes
made to a device are immediately
audible. In order to work on a real device:
1. Connect the device and discover the connected units (see
Section 10.1).
2. Drag the remote device into the workspace onto the virtual
device (see FIGURE 23).
3. If the internal device setup is different you’ll be
prompted to select the realignment direction.
By selecting yes the device setup is transmitted from the
virtual device to the real device. By selecting no the device
setup is transmitted from the real device to the virtual one.
WARNING! By answering “yes” to the realignment question,
the M Series device loses data on the selected preset slot.
It is now possible to operate on the device.
FIGURE 21: Left click to select (the blue rectangle appears)
and right click for import.
FIGURE 22: Select the desired layout in the combo-box.
FIGURE 23: Drop the discovered device on the virtual device; when
the arrow appears, release the left mouse button
FIGURE 24: Realign window, asking for synchronization.
16

WARNING! Remember that turning off or disconnecting the
power plug without saving changes on any internal memory slot leads
to data loss. Before turning off, save the data on any internal slot or
export to a .pam le.
10.3 File operations
There are several import/export possibilities from/to les on a
M Series unit. This section contains an explanation of all possible
cases.
WARNING! Due to the internal structure of the device, some of
these le operations can cause a temporary interruption of audio.
10.3.1 Binary preset le .preset
Handling of the internal binary preset of an M Series DSP
module is possible in the preset tab of the device.
EXPORT: export the actual preset slot to a .preset le.
WARNING! If the actual playing preset wasn’t saved before
export, the exported binary will be the last stored binary and
not the current playing preset.
IMPORT: save a .preset le on the selected slot and recall that slot.
WARNING! This leads to a couple of seconds interruption of
the audio stream.
WARNING! The data contained in a .preset le irreversibly
modies a preset slot and its internal layout.
10.4 Input/output curves .icp, .ocp
From the input or output tab of an M Series device, import/
export of the current equalization curve is a straightforward
procedure.
WARNING! All changes will be lost if the preset is NOT
stored on board before unplugging the unit from the mains.
10.5 Channel preset .chp
Import/export of the current playing processing from/to a le
is possible by starting from the device’s layout.
WARNING! All changes will be lost if the preset is NOT
stored on board before unplugging the unit from the mains.
NOTE: Importing channel preset les doesn’t modify the
internal structure of a device. For example, a channel exported
from a 1 in / 2 out conguration doesn’t affect the internal
structure when imported in 2 in / 2 out processing layout.
FIGURE 25: MxxD have only one DSP module.
FIGURE 26: MxxQ have two DSP modules. It is therefore necessary
to change both slots.
FIGURE 27: The output eq: there are 4 possible choices
to handle the curve.
FIGURE 28: All possible channel operations are available by right
clicking on the respective channel.
17

NOTE: In the 1 in / 2 out conguration, the input eq is exported
(or applied) to both input eq’s. For example, exporting 1 in / 2 out
congurations exports the unique input eq to both channels.
10.6 Device preset le .pam
The preset le allows to import/export entire dumps of the
device. An exported .pam le allows to completely replicate the
DSP process on another device. In order to import/export a .pam
le:
fSelect the device (a blue rectangle will appear)
fRight click on the selected device
fClick on import/export
When importing a .pam le you’ll be prompted for a decision
on the realignment policy to adopt.
By selecting yes, the device setup is transmitted from the
virtual device to the real device. By selecting no, the device setup
is transmitted from the real device to the virtual device.
WARNING! Importing a .pam le leads to a short interruption
of the audio stream.
WARNING! Importing a .pam le overwrites the current preset
slot on the device. Any previous data on the slot will be erased.
10.7 System File .paw
Saving or opening a system le permits the storage of the entire
processing of the current device imported in the workspace. For
more information on system conguration, please refer to the
Armonía manual.
The save operation may be seen as a large .pam export of the
entire device; on the other hand, opening a .paw le is equivalent
to performing a large .pam import on multiple devices. The user
will be prompted for multiple realignment decision on any de-
synchronized devices.
If the question is answered with:
fyes, the device specied in the window will be aligned to the
data in the .paw le;
fyes to all, all the devices will be aligned to the data in the
.paw le;
fno, the device specied in the window will NOT be aligned
to the data in the .paw le but the data will be reloaded from
the device.
fno to all, all the devices will NOT be aligned to the data in
the .paw le but the data will be reloaded from the devices.
WARNING! During import or preset manager operations the
save .paw function is disabled.
10.8 DSP remote operations
WARNING! Due to the internal structure of the system some of
the following le operations can lead to a short audio interruption.
WARNING! All changes will be lost if the preset is NOT
stored on board before unplugging the unit from the mains.
10.8.1 Routing
The input routing is based on the processing layout used: the
1 in / 2 out conguration, for example, allows input on odd
channels only. On the other hand, the 2 in / 2 out conguration
allows input on every channel. In this conguration, a mono mix
from both channels is also allowed: the two channels are added
together and their sum divided by two to normalize the resulting
level. Available congurations are listed in TABLE 4 and TABLE 5.
Module 0 conguration Input Module 0 Output Module 0
1 In / 2 Out Ch1 Ch1/Ch2
2 In / 2 Out Ch1/Ch2 Ch1/Ch2
TABLE 4: MxxD ampliers routing.
Module 0 conguration Input Module 0 Output Module 0
1 In / 2 Out Ch1 Ch1/Ch2
2 In / 2 Out Ch1/Ch2 Ch1/Ch2
Module 1 conguration Input Module 1 Output Module 1
1 In / 2 Out Ch3 Ch3/Ch4
2 In / 2 Out Ch3/Ch4 Ch3/Ch4
TABLE 5: MxxQ ampliers routing.
10.8.2 Input eq
The input eq is intended for system operations. The input eq provides
a range of biquad lters that can act as any generic IIR lter. From the
input eq page, the frequency response of each channel can be adjusted
in several ways. Discrete time delays can also be inserted. The presence
of every input eq used in the device layout is reported on the tabbed
channel on the bottom left hand side of the screen. The frequency
response curves, together with other View items, are color coded: blue
for channel 1, red for channel 2, green for channel 3, orange for channel
4. Every channel allows regulation of lters, mute, gain, delay and polarity.
The frequency response (and/or phase response) curve displayed is
always obtained as the combined response of all currently active lters.
FIGURE 29: The .pam import/export operation from the workspace.
Note the blue rectangle on the selected device.
18

10.8.3 Output eq
This page’s general appearance is similar to that of the Input
Equalizer page, but presents several important differences.
The Output Eq. curve the amplier employs is meant to be
created from the speaker manufacturer’s data for the particular
loudspeaker cabinets or arrays the amplier will be driving. It
provides a range biquad lter that can act as crossover or generic
IIR lter. From this page, the frequency response of each channel
can be adjusted in several ways. Discrete time delays can also be
inserted. The presence of every output eq. present in the device
layout is reported on the tabbed channel on the bottom left
hand side of the screen. The frequency response curves, together
with other View items, are color coded: blue for channel 1, red
for channel 2, green for channel 3, orange for channel 4. Every
channel allows regulation of lters, mute, gain, delay and polarity.
The displayed frequency response (and/or phase response) curve
is always obtained as the combined response of all currently active
lters.
10.8.4 Limiters
The function of the limiters is to protect voice coils from
burning out due to excess power being delivered over an extended
period of time or from excessively large signal peaks by limiting the
maximum output voltage of the amplier. The limiter window is
accessible by clicking on the limiter block in the device layout view.
Every channel limiter is color coded: blue for channel 1, red for
channel 2, green for channel 3, orange for channel 4.
10.8.5 RMS limiter
Electromechanical transducers are highly inefcient; as such
they transform a signicant amount of input power into heat. The
function of the RMS limiter is to protect the voice coils of speaker
drivers from burning out due to excess power being delivered over
an extended period of time. The RMS limiter is set by selecting a
desired maximum power value but acts by limiting output voltage;
by applying Ohm’s law with a xed reference 8 � load, the output
voltage level corresponding to the desired maximum output
power value is calculated as the square root of power times the
load resistance (8 �). It is possible to set the values of:
fThreshold in watts, with respect to an 8 � load.
fAttack time is the time between the moment the output
voltage exceeds the threshold and the moment of the onset
of the limiting action.
fHold time is the length of time during which the limiting action
is maintained before the gain returns to normal levels because
the output voltage drops below the threshold level.
fRelease time is the length of time over which the limiting
action is reduced and the gain is returned to normal following
the drop of the output voltage below the threshold level.
10.8.6 Peak limiter
The function of the peak limiter is to protect voice coils from
excessively large signal peaks by limiting the maximum output
voltage of the amplier. It’s possible set the values of:
fThreshold in volts, is the amplier max output voltage level
corresponding to the maximum displacement of the speaker
diaphragm.
fHold time is the time over which the limiting action is
maintained before the gain level is returned to normal after
the output voltage drops below the threshold.
fRelease time is the length of time over which the limiting
action is reduced and the gain is returned to normal following
the drop of the output voltage below the threshold level.
10.8.7 Damping factor correction
The effect of cable resistance on a high power amplier
performance becomes signicant at low frequencies, as the cable
resistance can affect the output stage damping factor. Powersoft
Damping Control is a proprietary algorithm which compensates
for cable resistance. The user can enter cable parameters and the
algorithm calculates and applies the appropriate correction. A tool
to calculate the cable resistance is provided.
Damping factor correction can also be used to ne tune low
end nuances: a negative resistance leads to a punched bass while a
positive resistance leads to a tailed bass.
FIGURE 30: The input eq layer.
FIGURE 31: The output eq layer.
FIGURE 32: The limiters dialog window.
19

The following values can be set by the user:
fEnable: enables the correction algorithm.
fResistance compensation: set the negative or positive resistance
value added to the output circuitry.
The cable resistance tool allows to set:
fCable dimensions: enter the gauge of the wire used in the
speaker cable and the cable length into the Wire gauge
dropdown list and the Wire length spinbox respectively.
The upper drop-down list allows to choose between metric
(international) and imperial units. The range of imperial wire
gauges is 6 AWG to 23 AWG, and of metric wire gauges 0.25
mm2to 10 mm2. Maximum cable lengths are correspondingly
3280 ft or 1000 m.
fResistance compensation: clicking Apply sets the cable
resistance value calculated as the correction factor. The fader
and its spinbox assume this value. However, the user can
manually modify this calculated nominal value to obtain, for
example, an enhanced LF response.
10.9 Locking
The locking mechanism allows the user to prevent changes to a
whole preset or a part of a preset. The locking interface is divided
in DSP module(s) and macro processing. Every module needs to
be locked separately; the lock status is preserved with the import/
export from/to le and copy/paste operations. In order to lock/
unlock an entire module or parts of a module:
1. Access the locking interface.
2. If the module you want to modify is already locked, you need
to insert the unlocking password for that module.
3. In order to lock the module with the selected layout, insert
the locking password and press the button Apply.
A number of operations are allowed here. Please refer to for
an explanation of the various functions and symbols.
10.10 On board preset operations
The preset tab of all M Series devices allows handling of the
internal binary preset of an M Series DSP module.
SAVE: allows saving of the current DSP processing on the
selected preset slot.
LOAD: recalls the selected preset slot.
FIGURE 33: The damping control window.
FIGURE 34: Click on the preset locking button in the
layout tab of the device.
FIGURE 35: Functions and symbols in the preset locking window:
1. Select module; 2. Select channel for the macro property.
3. A padlock indicates a locked property; 4. A pencil indicates a
writable property; 5. The combo box allows to change the
single macro property.
FIGURE 36: MxxD preset handling.
FIGURE 37: MxxQ preset handling.
20