Martin Audio DX1 User manual

Martin Audio – DX1 Speaker Management System
CONTENTS (ENGLISH) Page No
1 IMPORTANT SAFETY INFORMATION 2
2 UNPACKING THE DX1 3
3 WARRANTY 3
4 INTRODUCTION 4
5 FRONT PANEL FUNCTIONS 5
6 REAR PANEL FUNCTIONS 6
7 OPERATING THE DX1 7
8 USING FACTORY PRESETS 7
9 CONFIGURING THE DX1 MANUALLY 9
10 CROSSOVER MODES 9
10.1 Filter slopes 9
10.2 Time alignment 10
11 BLOCK DIAGRAMS 11
12 OUTPUT LIMITERS 13
13 FUNCTION SCREENS 14
13.1 Parametric equaliser screen 14
13.2 High and lowpass filter screens 15
13.3 Limiter screen 15
13.4 Delay screen 16
13.5 Polarity screen 16
13.6 Gain screen 16
14 CROSSOVER SUB-MENU 17
15 INPUT SETUP SUB-MENU 17
16 SECURITY SUB-MENU 18
17 SYSTEM SUB-MENU 19
18 INTERFACE SUB-MENU 19
19 INTERFACE OPERATION 19
20 EQUALISATION CURVES 20
21 TECHNICAL SPECIFICATIONS 22
22 OPERATING NOTES 23
23 APPENDICES 24
MARTIN AUDIO
LONDON
The Martin Experience
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1 IMPORTANT SAFETY INFORMATION
Do not remove Covers. No user serviceable parts inside, refer servicing to
qualified service personnel.
This equipment must be earthed.
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
DO NOT EXPOSE TO RAIN
OR MOISTURE
It should not be necessary to remove any protective earth or signal cable
shield connections.
Do not defeat the 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 wider blade
and the third prong are provided for your safety. When the provided plug
does not fit into your outlet, consult an electrician for replacement of the
obsolete outlet.
Only use this equipment with an appropriate mains cord.
In the USA the cord should comply with the requirements contained in the
Standard for Cord Sets and Power Supply Cords, UL 817, be marked
VW-1, and have an ampacity rating not less than the marked rating of the
apparatus.
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!
This equipment conforms to the requirements of the
EMC Directive 89/336/EEC, amended by 92/31/EEC
and 93/68/EEC and the requirements of the Low
Voltage Directive 73/23/EEC, amended by 93/68/EEC.
Standards Applied EMC Emission EN55103-1:1996
Immunity EN55103-2:1996
Electrical Safety EN60065:1993
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Thank you for purchasing the Martin Audio DX1 Loudspeaker Management
System. The DX1 is designed to compliment all our current loudspeaker
products that require or benefit from the use of a system controller.
2 UNPACKING THE DX1
Each Martin Audio DX1 controller is built, tested and thoroughly inspected to
the highest standard before leaving the factory. After unpacking the unit
please examine it for any signs of transit damage and inform your dealer if
any such damage is found. Please retain all packaging in case of future
re-shipment.
Please note that Martin Audio and it’s distributors cannot accept
responsibility for damage to any returned product through the use of non
approved packaging.
3 WARRANTY
Martin Audio DX1 Speaker Management Systems are warranted against
manufacturing defects in materials or craftsmanship over a period of 1 year
from the date of original purchase. During the warranty period Martin Audio
will, at it's discretion, either repair or replace products which prove to be
defective provided that the product is returned in its original packaging,
shipping prepaid, to an authorised Martin Audio service agent or distributor.
Martin Audio Ltd. cannot be held responsible for defects caused by
unauthorised modifications, improper use, negligence, exposure to inclement
weather conditions, act of God or accident, or any use of this product that is
not in accordance with the instructions provided by Martin Audio.
Martin Audio is not liable for consequential damages.
This warranty is exclusive and no other warranty is expressed or implied.
This warranty does not affect your statutory rights.
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4 INTRODUCTION
The DX1 is a compact and powerful DSP based audio-processing unit
ideally suited for live applications and fixed installations. To achieve this
the DX1 has 2 inputs and 6 outputs, which can be configured in 5 basic
modes, 2 x 2 way, 2 x 3 way, 4 way, 5 way and 6 way crossover. Each
input has adjustable gain and delay, each output consists of a high and
lowpass filter, 5 bands of parametric equalisation, limiter, delay (adjustable
in 2.6ms steps), gain and polarity controls. RS232 interface and user
memories are provided as well as a multi-level security 'lock-out' function
for all controls. The DX1 is supplied pre loaded with the most common
configurations for all of our current product ranges that require or benefit
from the use of a system controller. Factory presets can easily be updated
by downloading the current file via a PC. The DX1 can also be used as a
fully configurable electronic crossover system incorporating all of the
features listed below.
Features
• Superb audio quality: Carefully optimised Double Precision processing
plus 40 bit internal data path for exceptional dynamic range and sonic
quality.
• A flexible 2 input, 6 output multi-mode format featuring a choice of 2 x 2
way, 2 x 3 way, 4 + 2 way, 5 + 1 way and 6 way crossover modes with
limiters.
• Each parametric section provides +15dB to -30dB of gain at centre
frequencies between 20Hz - 20kHz with a wide range of Qs from 0.4 to
128. All parameters feature fine resolution with 1/36th octave frequency
steps, 0.1dB gain increments and 100 Q settings. Any parametric
section can be set for LF & HF shelving response.
• Six high performance limiters are provided, featuring a wide range of
control over Attack, Release and Threshold parameters. The output
meters show headroom to the limit threshold. The meter time constants
track the limiter time constants to show precise power usage.
• Variable High and Low pass filters for each output can be set for 12, 18
and 24dB per octave slopes with a choice of Bessel, Butterworth or
Linkwitz-Riley responses. Independent control over High & Lowpass
functions allows asymmetric crossover functions to be realised.
• Three velocity-sensitive rotary encoders provide a familiar and easy to
use control format with all filter information displayed simultaneously on
a backlit LCD display.
• Delay of up to 650mS can be independently set for each output with a
minimum increment of 2.6µs.
• Comprehensive standard specification includes a maximum of 80 factory
presets, 19 user memories, RS232 interface for factory preset updates
via a PC and a multi-level security lockout function.
• The DX1 provides exceptional audio quality with a full >110dB dynamic
range, high sampling rate and minimal filtering.
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5 FRONT PANEL FUNCTIONS
1. LCD Display - Shows menu options, output information and various
parameters being adjusted.
2. Gain Keys - Two input and six-output GAIN keys allow instant access
to the gain screen for each channel. Pressing a second time selects
the last function edited.
3. Next Key - Moves the display forwards through the list of available
parameters for the current input or output channel.
4. Back Key - Moves the display backwards through the list of available
parameters for the current input or output channel.
5. Menu Key - Activates the main menu on the LCD display. Pressing a
second time selects the last menu edited. Different menus are
selected by pressing the BACK and NEXT keys or using the FREQ
control.
6. Enter Key - Enters the chosen menu and confirms menu selections.
7. Quit Key - Exits the menu.
8. Bypass Key - Allows the currently displayed parametric section to be
bypassed. (Note: The Highpass / Lowpass filters and limiters cannot be
bypassed.)
9. Parameter Controls - The three velocity sensitive rotary encoders
allow the relevant parameter on the LCD screen to be adjusted.
10. Input Meters - Displays available headroom before input clipping
occurs. The bottom LED displays the presence of signals between
-24dB and -6dB of input headroom, with the orange LED set at 6dB
below clipping. The top, red LED displays digital overflow and can
therefore light without the other LEDs becoming illuminated.
11. Output Meters - Displays headroom before limiting occurs. The
bottom LED displays between -24dB and -3dB of headroom, with the
orange LED set at -3dB. The top, red LED is set at the limiter
threshold for that channel.
12. Mute Keys - Six output mute keys with LED indicator.
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DX1Digital Speaker
Management System
<BACK> <NEXT>
MENU ENTER
BYPASS QUIT
FREQ 'Q' GAIN
12
11
10
2
9
6
3
4
5
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6 REAR PANEL FUNCTIONS
1. Power Switch.
2. Mains Fuse - Located in a finger-proof fuseholder adjacent to the
mains inlet. Always replace this fuse with the correct type as shown on
the rear panel legend. (N.B. A spare fuse is located in this holder.)
3. Mains Power - Connected via a standard IEC socket. A compatible
power cord is supplied with the unit.
4. External - RS232 via a 9-pin DIN DEE socket, for connection to a PC.
5. XLR Inputs and Outputs - 3 pin XLR connectors are provided for
each audio input and output. All terminations are fully balanced, pin 2
Hot, pin 3 Cold and pin 1 Screen (shield).
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POWER
DO NOT EXPOSETO RAIN OR MOISTURE
EXTERNAL
MAINS IN 90V - 240V AC 50 - 60Hz 30W
CAUTION FOR CONTINUED
PROTECTION AGAINST FIRE
REPLACE ONLY WITH SAME
TYPE 11A, 250V FUSE WARNING THIS EQUIPMENT MUST BE EARTHED CAUTION SHOCK HAZARD DO NOT REMOVE COVERS. AVIS RISQUE DE CHOC ELECTRIQUE, NE PAS OUVRIR. MADE IN THE UK
XLR PIN
P1=SHIELD
P2=HOT
P3=COLD
OUTPUT 6 OUTPUT 5 OUTPUT 4 OUTPUT 3 OUTPUT 2 OUTPUT 1 INPUT B INPUT A
5
4
32
1
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7 OPERATING THE DX1
The DX1 can be used in two ways:
1. Using pre loaded factory presets to configure the DX1 for use with
Martin Audio products.
2. As a generic digital loudspeaker management system. Note: this
requires the user to configure the DX1 manually, i.e. by entering
crossover information via the controls on the front panel. The DX1 is
equipped with 19 user memories for storing these configurations.
8 USING FACTORY PRESETS
The DX1 is supplied pre loaded with the most common configurations for all
our current product ranges that require or benefit from the use of a system
controller. This section shows how to get up and running quickly by loading
and configuring a factory preset without having to read the entire manual.
Loading a factory preset
1. Turn the unit on via the mains switch on the rear panel. The unit
displays the version number of the factory preset file and starts the
‘wake up’ routine. After ten seconds the unit becomes operational and
is now ready to load a preset.
2. Press MENU followed by ENTER. The display will read "Load a
crossover". Press ENTER again. When using the unit for the first time
the display shows "1:". This is the first of the 19 user memories. At
this stage all of the user memories will be empty. Use the FREQ
control to scroll forward to the required preset (see Appendix 3), the
factory presets start at number 20. Note: If you have already loaded a
preset previously the display will show the name and number of the last
preset that you loaded.
3. Once the required preset is displayed, press ENTER. The display will
prompt "[ENTER] for Recall.", press ENTER and the preset will
instantly be loaded. Note: if you have already loaded a preset in to the
unit and want to load a different preset you will be prompted "Different
crossover ??? [ENTER] for Recall." after you press ENTER. Press
ENTER again and the selected preset will be loaded in place of the
previous one.
Note: If no action is taken after ten seconds in the menu mode the unit
will return to normal 'default' mode. Repeat instructions 2. and 3. to
return to menu mode.
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Configuring a factory preset
Once a preset has been loaded there are three user configurable
parameters. Note: all other parameters accessed via the GAIN buttons,
such as crossover points and parametric equalisation are locked and
cannot be altered by the user.
1. Output gain trim: The gain of each output channel can be adjusted by
plus or minus 6dB. This is intended for normalising power amplifiers of
differing gain. To alter gain trim press the GAIN button of the channel
to be adjusted. The display now shows "Trim = 0 dB". Use the rotary
control marked GAIN to adjust the channel gain as required.
2. Output delay: This parameter can be altered in a system incorporating
more than one stereo pair of speakers in order to set inter cabinet
delays, for example: between a subwoofer and a mid-high cabinet.
Use the rotary FREQ control for 1ms increments and the rotary Q
control for 2.6ms increments. Note: inter driver delays within a cabinet
are linked together so that altering one delay will automatically adjust
the other to keep drivers perfectly aligned.
3. Output limiters: All factory presets are supplied with the limiters set at
their maximum level and with the time constant set to automatic. Use
the rotary GAIN control to adjust the limit level. It is essential that the
user sets the correct limit level in order to protect both amplifiers and
speakers in the system. Note: the correct limit level is determined by
the output of the power amplifiers and power handling of the speaker
system. As a general rule of thumb, if the amplifier is clipping turn the
limit level down! Please refer to Appendix 1 for a table of dBu to Vrms
conversion.
The user can also edit the gain of the input channels as well as the overall
system delay. This is most applicable when configuring a system that
features multiple speaker systems and multiple DX1 controllers.
Note: all of the above settings are retained when the unit is switched off.
Once the preset has been configured it can be locked so that the unit
cannot be accessed by unauthorised personnel, see ‘Security Sub-menu’
on page 18.
For a description of how to connect signal inputs and outputs to the DX1
please refer to the block diagrams on pages 11 and 12. Please note how
the output connector configuration changes with respect to frequency
bands (eg: low, mid, high) as the configuration of the controller changes,
i.e. 2x2 way, 1x4 way, 1x6 way etc. Appendix 3 explains which outputs the
frequency bands are assigned to for each preset.
Once the preset is loaded, configured and connected to the rest of the
system in accordance with the block diagrams on pages 11 and 12, it is
now ready for use.
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9 CONFIGURING THE DX1 MANUALLY
Introduction
This section describes how to use the DX1 as a generic loudspeaker
management system. We recommend that you read the whole of the
manual before using the DX1 in this manner.
To simplify set-up of the DX1, 5 crossover modes are menu selectable.
These all have parametric equalisers, high and low pass filters, limiters,
gain and delay. For detailed information on these modes please study the
block diagrams along with the following descriptions. The 2x2 way and 2x3
way crossover modes have the option available to provide precise 'ganged'
parameter adjustment for stereo sources.
10 CROSSOVER MODES
All crossover modes feature adjustable crossover frequencies with a choice
of slopes, 5 bands of driver compensation E.Q. per output, delay time,
limiters and absolute phase adjustment for each output.
10.1 Filter slopes
A choice of Bessel or Butterworth slopes at 12/18/24dB per octave and
Linkwitz-Riley at 24dB per octave are provided. Since Low and High pass
functions are separately adjusted, asymmetric slopes are easily achieved if
required. It should also be noted that the turnover frequency displayed on
the DX1 is the -3dB point for all slopes except 24dB Linkwitz-Riley where
the -6dB point is shown. If the -6dB point is to be used for the Bessel or
Butterworth filter, take the required crossover frequency, multiply this by the
appropriate factor from the following table and then select the closest
available frequency on the DX1 display.
Filter Type High pass filter factorsLow pass filter factors
Bessel 12dB/octave 1.45 0.69
Butterworth 12dB/octave 1.31 0.76
Bessel 18dB/octave 1.37 0.73
Butterworth 18dB/octave 1.19 0.84
Bessel 24dB/octave 1.35 0.74
Butterworth 24dB/octave 1.15 0.87
Please note that unlike conventional analogue crossovers, crossover points
and slopes are set with absolute accuracy since component tolerance
problems do not occur.
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10.2 Time Alignment
A further advantage of the DX1 over conventional products is the provision
of an independently adjustable delay section for each output. This allows
the true arrival time from multiple drivers to precisely aligned rather than
relying on the compromise 'phase adjust' approach. Delay time is
adjustable in 2.6µs steps (1mm). To convert from units of time
(i.e. milliseconds) to units of distance use the following formula:
1 millisecond = 343mm (1.126ft) @ 20°C (68°F) or to calculate time delay
for a known distance, use:
Time delay = Distance in meters
20.06 x √273+˚C
Where ˚C is the temperature in ˚C.
Or to simplify this equation at 20˚C.
Delay time in milliseconds = Distance in meters x 2.192.
Or delay time in milliseconds = Distance in feet x 0.955
(N.B. Centigrade = (Fahrenheit –32) x 0.5555).
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11 BLOCK DIAGRAMS
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DX1 2 X2 WAY + SUM A+B CROSSOVER
DX1 2 X 3 WAY CROSSOVER
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DX1 4 WAY CROSSOVER + 2 AUX
DX1 5 WAY CROSSOVER + 1 AUX
DX1 6 WAY CROSSOVER
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12 OUTPUT LIMITERS
High performance digital limiters are provided for each output with control
over attack time, release time and threshold level parameters (see page
15). This level of control allows the user to balance the required subjective
quality of the limiter against the driver protection requirements. It does also
mean that an incorrectly set limiter may sound awful! In particular, as with
all limiters, using too fast an attack or release time will result in excessive
low frequency distortion. In the ‘design a crossover’ sub-menu there is an
option for automatic limiter time constants. In this mode the time constants
will be automatically set from the Highpass filter frequency. See table
below.
Table of automatic attack and release times.
The time constants are set by the high pass filter frequency for that
channel. It is highly recommended that the automatic setting is used to
ensure highest sound quality and simplicity of configuration.
High pass filter Auto attack time Release
<10Hz – 31Hz 45ms x16 (720ms)
31Hz – 63Hz 16ms x16 (256ms)
63Hz – 125Hz 8ms x16 (128ms)
125Hz – 250Hz 4ms x16 (64ms)
250Hz – 500Hz 2ms x16 (32ms)
500Hz - 1kHz 1ms x16 (16ms)
1kHz – 2kHz 0.5ms x16 (8ms)
2kHz – 22kHz 0.3ms x16 (4ms)
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13 FUNCTION SCREENS
13.1 Parametric equaliser screen
All modes feature 5 bands of fully flexible parametric equalisation per
output, with all sections selectable to Low or High frequency shelving
response.
Each parametric section can be positioned at a frequency from 20Hz to
20kHz and features a wide range of 'Qs’ to produce response curves
ranging from broad to notch. The gain control ranges from +15dB to -30dB
in 0.1dB steps. Frequency steps are 1/36 octave resolution for precise
control. Since all filtering is achieved in DSP all settings are re-settable
with absolute accuracy and in ganged mode parameters track identically.
Very narrow band notch filters (maximum Q of 128) can be achieved and
unlike analogue filters these 'tight' Q filters are entirely stable. The
maximum notch depth is -30dB.
Parametric filters are carefully implemented using Double Precision
processing. This method is costly in terms of processing power but yields
substantial benefits in terms of the DX1’s exceptional noise performance
and greatly improved low frequency stability.
To adjust parametric settings:
Use the FREQ control for the frequency.
Use the Qcontrol for the Q.
Use the GAIN control for the gain.
Use the BYPASS key to switch the parametric filter in and out of circuit.
Note: the diamond symbol in the top right hand corner of the display
indicates that the filter is in circuit and the horizontal line symbol shows that
it is out.
(N.B. To show parametric filters in bandwidth (BW) rather than Q, go into
the system sub-menu, select ’filter Q or BW’ and then select ‘BW’.)
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OP1+4 Low PEQ:1 ◊
1K00Hz Q=3.0 0.0dB
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13.2 High and lowpass filter screens
Each output has an independent high pass filter and an independent low
pass filter. Both filters have a range of selectable slopes which are Bessel
12dB, 18dB and 24dB, Butterworth 12dB, 18dB and 24dB, and Linkwitz
Riley 24dB.
Highpass filters have a range of <10Hz (through) to 16kHz and Lowpass
filters have a range of 22kHz (through) to 59Hz in 1/36 octave steps.
HPFs and LPFs can be asymmetrically set.
To adjust HPF/LPF settings:
Use the FREQ control for the frequency.
Use the Qcontrol for the slope.
13.3 Limiter screen
Each output has an independent high performance limiter.
All limiters have an attack range of 0.3ms to 90ms, release times are 4, 8,
16 and 32 times the attack time and thresholds range from +22dB to –10dB
in 1dB steps.
If the automatic limiter time constant option is in use, all limiter screens will
say ‘automatic’ and the time constants will be set from the Highpass filter
frequency. A table of dB to Vrms is in appendix 1.
The output meters are linked to the time constants of the limiters so true
output metering is achieved.
To adjust limiter settings:
Use the FREQ control to adjust the attack time.
Use the Qcontrol for the release time.
Use the GAIN control for the limiter threshold.
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OP1+4 Low HPF
<10Hz Bessel 24dB
OP2+5 Mid Limiter
Atk:4.0mS Rx16
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13.4 Delay screen
Each output has an independent delay time control. This can be adjusted
in 2.6µS steps or in 1ms steps giving complete control over driver time
alignment.
Input delay (base delay) is adjustable in 1ms steps only.
To adjust delay settings:
Use the FREQ control for coarse control. (1ms steps)
Use the Qcontrol for fine control. (2.6µS steps)
13.5 Polarity screen
Each output has an independent polarity screen. This gives the flexibility to
reverse (flip by 180˚) the phase of individual outputs.
(N.B. When the outputs are ganged, the polarity screens remain individual.)
To adjust the polarity:
Use the GAIN control to switch between + and -.
13.6 Gain screen
Each output and input has an individual gain screen. The outputs have a
range of +15dB to –40dB, adjustable in 0.1dB steps and the inputs have a
range of +6dB to –40dB, again adjustable in 0.1dB steps.
To adjust the gain:
Use the GAIN control.
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OP1 Low
Delay = 1.003mS
O/P1+3 Low
Gain = 0.1dB
OP1 Low
Polarity = [ + ]
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14 CROSSOVER SUB-MENU
Press MENU and select crossover Sub-menu using the BACK, NEXT and
ENTER keys. Three options are available in this sub-menu which are:
Load a crossover Loads a factory preset or crossover stored in a user
memory. Note: the unit ships with all user memories empty. It is up to the
user to program these memories as the application requires. However, all
the most common settings for our products are included in the factory
presets for your convenience and in the majority of cases it will not be
necessary to use this option.
Note: loading a crossover will not overwrite the input settings.
Design a crossover Opens a utility to design a crossover. Options
include format type, ganging of outputs, routing and automatic limiter time
constants.
Store a crossover Stores a crossover (all output settings) to one of 19
user memories. Use the FREQ control to select the memory number.
Press ENTER and you will be prompted to set the memory name. Use the
FREQ control to scroll through the available characters. Use the NEXT key
to move to the next character. The memory name can contain up to 16
characters. Press ENTER to store to memory.
Note: this sequence must be completed for a memory to store. If after 15
seconds no store has been implemented the unit will return to the default
mode.
When storing a memory the LCD shows the next available empty memory
automatically but any user memory number can be chosen and any user
memory can be overwritten. Previously used memories are identified by a
'?' question mark. Note: the factory presets cannot be overwritten. If you
want to make a permanent record of the user configurable settings of a
factory preset, the preset can be saved to a user memory by following the
above procedure. This is especially useful if the unit is to be used with a
variety of presets on a regular basis. This will not unlock the ‘locked’
parameters of the preset!
Note: it is not possible to save the input settings to a user memory.
15 INPUT SETUP SUBMENU
Press MENU and select Input Set-up Sub-menu using the BACK, NEXT
and ENTER keys. There is one option in this menu:
Gang Inputs: Gangs A and B inputs so that precise adjustments can be
made to both inputs simultaneously. In this mode the LCD will show A+B
when either of the input ‘GAIN’ buttons are pressed.
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16 SECURITY SUB-MENU
Press MENU and select Security Sub-menu using the BACK, NEXT and
ENTER keys. Press ENTER to load one of the four selections (See below).
A four-digit security code will be asked for. This can be entered by using
the FREQ control, to select a character, and the BACK and NEXT keys to
move to the next character. Alternatively, the GAIN keys can be used to
enter a code by pressing any combination of the eight buttons. Each GAIN
key represents it’s channel labelling, so any combination of A, B, 1, 2, 3, 4,
5 and 6 can be used as a code.
Lock options:
Changes only: This option locks all parameters so that no changes can be
made, including all menus.
Changes + view: This option locks all parameters and the viewing of them
on the LCD including all menus.
Changes + mutes: This option locks all parameters, including all menus,
and disables all mute keys.
Everything: This option locks all parameters and the viewing of them,
including all menus, and disables all mute keys.
To 'unlock' the security system, press the MENU key and enter correct
code.
IMPORTANT - Please Note that once the security system is initiated only
re-entering the correct code will 'unlock' the DX1's functions. Please note
the code! If the security code number is inadvertently lost contact your
local Martin Audio sales office.
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17 SYSTEM SUB-MENU
Press MENU and select System Sub-menu using the BACK, NEXT and
ENTER keys. Several options are available in this sub-menu which are:
System Status: Displays unit information including software version and
temperature. Curr. Temp. = current temperature in degrees Celsius.
Max1. Temp. = maximum temperature this session.
Max2. Temp. = maximum temperature ever reached.
LCD Contrast: Adjusts the LCD contrast from 0 to 100.
LED Brightness: Adjusts the LED brightness from 1 to 15.
Temperature Alarm: Sets a temperature warning between 20 and 80˚C.
The default screen will flash ‘ALARM. Temp = n˚C’ when the specified
temperature is reached. (N.B. the warning does not affect the performance
of the unit in any respect.) This feature is intended to alert the user to
changes air temperature which will have a consequent effect on delay time.
This is of use when aligning remotely sited ‘delay stacks’ as opposed to
inter drive unit delays. See page 10 for an explanation of the relationship
between air temperature and delay time.
Wake-up Time: Sets how the unit starts up with one of the following options.
0 to 60 seconds: Waits the specified time before unit wakes up.
Mute hold: Turns on and holds all output mutes when turned on.
(N.B. Wake-up is a slow ramp in level for about 5 seconds.)
Output Meters: Selects whether the output meters are pre or post mute.
Filter Q or BW: Selects whether ‘Q’ or Bandwidth is displayed in the
parametric screens.
Delay Time/Distance: Selects the display of delay in milliseconds, metres or feet.
18 INTERFACE SUB-MENU
Press MENU and select crossover Sub-menu using the BACK, NEXT and
ENTER keys.
Interface Setup
Opens a utility to configure the RS232 interface.
19 INTERFACE OPERATION
The DX1 has a RS232 external interface. This allows the factory presets in
the DX1 to be updated via a PC. Updates will occur when new products
that require the use of a controller are released. Instructions on how to
load the latest factory preset file will be supplied with the factory preset file
and it’s accompanying downloading software.
RS232 interface configuration
Select the following options in the Interface Setup menu:
External Mode: On.
RS232 Baud: 2400, 4800, 9600, 19200, 38400 (Select the baud rate, this
should correspond to the baud rate set on the computer.)
Martin Audio – DX1 Speaker Management System
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19
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20 EQUALISATION CURVES
Parametric filter gain curves.
Parametric filter 'Q' curves.
Parametric filter High and Low shelf curves.
Martin Audio – DX1 Speaker Management System
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20
Frequency = 1kHz, Q=4.0
Frequency (Hz)
Frequency = 1kHz, Gain = +15dB
Lowshelf @ 100Hz
Highshelf @ 5kHz
Frequency (Hz)
Frequency (Hz)
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