d & b audiotechnik E-PAC User manual

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E-PAC Amplifier
Hardware manual (1.2 EN)

Symbols on the equipment
Please refer to the information in the operating
manual.
WARNING!
Dangerous voltage!
General Information
E-PAC Amplifier
Hardware manual
Version 1.2 EN, 02/2013, D2014.E.01
Copyright © 2013 by d&b audiotechnik GmbH; all rights reserved.
Keep this manual with the product or in a safe place so
that it is available for future reference.
In the case of reselling this product handout this manual to the new
customer.
If you supply d&b products, please draw the attention of your
customers to this manual. Enclose the relevant manuals with the systems.
If you require additional manuals for this purpose, you can order them
from d&b.
d&b audiotechnik GmbH
Eugen-Adolff-Strasse 134, D-71522 Backnang, Germany
Telephone [phone], Fax [phone]
E-mail: [e-mail], Internet: www.dbaudio.com

Contents
1. Safety precautions...........................................................4
1.1. Information regarding use of the E-PAC Amplifier.........................4
1.2. Service/Maintenance...............................................................................4
2. Introduction......................................................................5
2.1. Intended use...............................................................................................5
2.2. Scope of supply.........................................................................................5
3. E-PAC Amplifier................................................................6
3.1. E-PAC based systems...............................................................................6
3.2. Block diagram............................................................................................6
3.3. Power supply..............................................................................................7
3.4. Protective circuits.......................................................................................7
3.5. Cooling.........................................................................................................8
3.6. E-PAC power amplifiers..........................................................................8
3.7. Digital signal processing..........................................................................8
3.8. Remote control...........................................................................................8
4. Controls and indicators....................................................9
4.1. Controls........................................................................................................9
4.1.1. Power switch [1].............................................................................9
4.1.2. MUTE switch (green LED) [2]......................................................9
4.1.3. LEVEL/PUSH MENU (Digital rotary encoder) [3]...............10
4.2. Indicators...................................................................................................11
4.2.1. LC Display [4]...............................................................................11
4.2.2. ISP LED - Input Signal Present (green) [5]............................11
4.2.3. GR LED - Gain Reduction (yellow) [6]...................................11
4.2.4. OVL LED - Overload (red) [7].................................................11
5. Connections....................................................................12
5.1. Mains Connector [8]..............................................................................12
5.2. Fuse protection [9]..................................................................................12
5.3. Signal inputs and link outputs.............................................................13
5.3.1. INPUT [12] and LINK [13].........................................................13
5.3.2. MIX IN [14]...................................................................................13
5.4. Loudspeaker output connectors - [15]..............................................13
5.5. REMOTE interface [14].........................................................................14
5.5.1. REMOTE [10]...............................................................................14
5.6. SERVICE [11]............................................................................................14
6. Installation and operation............................................15
6.1. Installation.................................................................................................15
6.1.1. E-PAC Rack mount kits..............................................................16
6.2. Dimensions................................................................................................17
6.3. Operation.................................................................................................18
6.3.1. Electromagnetic compliance....................................................18
6.3.2. Power consumption and power loss......................................18
7. Technical specifications..................................................20
8. Manufacturers declarations..........................................22
8.1. EU declaration of conformity (CE symbol).......................................22
8.2. WEEE declaration (Disposal)...............................................................22
E-PAC Amplifier, Hardware manual (1.2 EN) Contents - 1

1. Safety precautions
1.1. Information regarding use of the E-PAC Amplifier
The E-PAC is a protective class 1 unit. Make sure that the earth(ground)
contact is attached when the unit is in operation. A missing earth
(ground) contact may lead to dangerous voltages in the housing and
controls and my lead to electric shock.
Before connecting the device to mains voltage, check that themains
voltage and frequency corresponds to the specifications on the
configuration sticker on the rear of the unit.
The amplifier's output pins can carry dangerous voltages. Only use
isolated loudspeaker cables with correctly mounted connectors.
Otherwise there is a potential risk of electric shock.
Never connect an amplifier output pin to any other in or output
connector pin or earth (ground). This might lead to electric shock or
damage the unit.
Lay all cables connected to the unit in a way that they cannot be
crushed by vehicles or other equipment.
Do not not put any kind of objects filled with liquids (e.g. Drinks) onto the
unit.
Avoid ambient conditions with:
•excessive humidity or steam.
•excessive dust or other small particles.
•oil steam or splashes.
•excessive heat or direct sunlight.
Do not block vents at the front or air intake at the rear and provide
sufficient cooling.
1.2. Service/Maintenance
Do not open the unit. No user serviceable parts inside.
In the case of any damage to the unit under no circumstances connect
and operate the unit.
For any damage to the power cord, the power cord must not be used
and must be disposed of from any further use.
Refer servicing only to qualified service personnel authorized by
d&b audiotechnik. In particular in the case of:
•mains power cord, socket or plug has been damaged.
•objects or liquids have entered the unit.
•the unit is not operating normally.
•the unit was dropped or the housing is damaged.
E-PAC Amplifier, Hardware manual (1.2 EN) Page 4 of 24

2. Introduction
This manual describes the facilities and functions of the hardware of the
d&b E-PAC Power amplifier controller.
2.1. Intended use
The E-PAC amplifier is a one channel power amplifier and controller
unit. It is designed for use with the d&b fullrange loudspeakers (passive
systems) and subwoofer systems.
AlinearmodeisavailableallowingtheE-PACtobeusedasalinear
power amplifier.
2.2. Scope of supply
Initial inspection
Before starting up please verify the shipment for completeness:
Qty. d&b Code Description
1Z2510 E-PACAmplifier
1K0025.030Powercord
1D2014.E.01E-PACAmplifier,Hardwaremanual
1D2015.E.01E-PACAmplifier,Softwaremanual
For any sign of obvious damage to the unit during
shipment under no circumstance connect and operate
the unit!
E-PAC Amplifier, Hardware manual (1.2 EN) Page 5 of 24

3. E-PAC Amplifier
E-PAC Power Amplifier Controller
3.1. E-PAC based systems
The E-PAC Power amplifier controller is a single channel amplifier with
an internal controller for operating the d&b fullrange systems (passive
systems) loudspeakers.
The controller incorporated in the E-PAC is based on a DigitalSignal
Processor, DSP, utilising sigma-delta signal conversion.
All operational states of the E-PAC as well as the pre-programmed
system settings and configurations for the d&b loudspeakerssystemsare
controlled with a front panel digital rotary encoder in conjunction with
the Liquid Crystal Display (LCD). The E-PAC has an additionallinear
configuration.
The E-PAC is specifically designed for high impedance loads (200 W
into 16 ohms, 300 W into 8 ohms).
If low impedance (LO IMP) mode is selected the E-PAC can drive up to
two 8 ohm or four 16 ohm loudspeakers, at reduced output (–6 dB).
This is useful for situations such as front fill or under balcony use where
multiple loudspeakers are needed but maximum output is not required.
All the functions of the E-PAC, including programmable internal delay
settings, can be remotely interrogated and altered via the RIB, Remote
Interface Bridge and a PC.
3.2. Block diagram
Power
amplifier
Input
stage
Input
Mix in
Signal
generator
sine wave or
pink noise for
acoustic tests
Input
monitoring
User
EQ
Delay
t
Dynamics
Coil temp.
t°
Power supply
Information
on headroom,
temperature,
power, mains
voltage
Excursion Z analysis:
load
monitoring
1+/1-
2+/2-
UI
System
EQ/XO
pilot signals
for load
monitoring
LC Display
Speaker
CUT
CPL
Equalizer
> Q7
on
off
off Set >
E-PAC
remote
interface
Output
routing
+
uC
E-PAC block diagram
E-PAC Amplifier, Hardware manual (1.2 EN) Page 6 of 24

3.3. Power supply
The switched mode mains power supply permits worldwide application
without the need for mains voltage switching or conversion. Special
regulation of the power supply unit additionally guaranteesconstant
output power with fluctuating mains voltage, leading to a substantially
higher dynamic stability than a conventional power supply unit of the
same performance. This benefits the reproduction of music orspeech
with a wide dynamic range.
Active Power Factor Correction (PFC) is characterised by thecurrent
drawn being represented by an almost sinusoidal waveform, resulting in
lower loss, in contrast to the pulse shaped current characteristic of
power supplies without PFC. This is an advantage where long mains
power supply cables are used.
The mains voltage and power consumption are recorded by the power
supply and can be viewed on the LCD display.
3.4. Protective circuits
The E-PAC contains many integrated protective functions:
If over temperature occurs, the device switches to mute. After it has
cooled down, the output stage resets automatically.
The output current limiter (SOA watchdog) prevents damage tothe
output stage that could occur from a short-circuit or incorrect cabling,
while passing the short current peaks drawn by a complex load like a
loudspeaker.
The mains power connection is protected by a fuse.
Amainsinrushcurrentlimiterprovidesa'softstart'andenables several
E-PACs to be powered up at the same time without over-loading the
mains power supply.
The maximum current draw during the power up phase is dependant on
the mains voltage, however nominal values are 2 A (peak) at 230V
and 4 A (peak) at 115 V.
The nominal operating range of the E-PAC is between 85 V and 265V
(100 V –15% /230 V +15 %). Where voltages outside of this range
are present, a self-resetting protective circuit responds quickly to isolate
the internal amplifier power supply leaving only a supervisory circuit to
monitor the mains voltage. The display will clearly indicatethefaultand
voltage value, the display illumination switching off after 10 seconds.
The supervision circuit will operate up to 400 V; this allows the
E-PAC to survive connection across two phases of a three phase supply.
To prevent the E-PAC from cycling on and off with fluctuating mains
power supply voltages, the switching thresholds are delayeddependant
on the condition breached. These voltage thresholds and corresponding
transition delay times are listed in the table below.
Mains voltage
VRMS
Condition
from ⇒
⇒⇒⇒to
Delay
276 V ON OFF 1 msec.
267 V OFF ON 2 sec.
83 V OFF ON 2 sec.
77 V ON OFF 20 msec.
E-PAC Amplifier, Hardware manual (1.2 EN) Page 7 of 24

To ensure a fast response to irregular mains conditions, the mains
voltage is registered in the E-PAC as an instantaneous peak value, the
switching thresholds correlated to that peak value. Peak values are
converted to rms values for display purposes. However a real-world AC
mains power supply is not typically represented by a perfect sinewave,
therefore, the peak-to-rms conversion is based on a typical sinewave
with a flat top at 96% of the amplitude of an ideal sinewave. As a
consequence, the displayed voltage and the actual switchingthresholds
will depend on the shape of the mains voltage or the quality of the
mains power supply, respectively.
3.5. Cooling
The aluminium enclosure acts as a heat sink for the E-PAC power
amplifier; it is therefore convection-cooled. To prolong the life of
components inside the E-PAC, a small fan located at the front of the E-
PAC intakes cooling air through an opening in the rear panel. The quiet
running fan is activated at two temperature thresholds. One at 30°C
(86°F) and a second, whereby the fan will draw air at a faster flow rate,
at above 45°C (113°F).
WARNING! Do not touch the heat sink. During operation the cooling fins of the heat
sink on the enclosure of the E-PAC can reach temperatures of 80°C
(176°F). The front and rear panels do not form part of the heat sink and
can be touched at any time.
3.6. E-PAC power amplifiers
The single channel power amplifier of the E-PAC maintains high linearity
throughout it’s operational range even into adverse loads. With fast
response to, and recovery from overload conditions, stability and
accurate performance is guaranteed. A two stage power supplykeeps
the losses through heat emission low. To maintain sound quality, a limiter
circuit prevents the amplifier from continuously reaching its maximum
output voltage, known as clipping.
The E-PAC can deliver 200 W continuous sine wave output power into
a16ohmloador300Wintoan8ohmload.Selectinglowimpedance
mode enables the E-PAC to deliver an output power of 150 W into
4 ohms. These values apply to continuous operation for a minimum of
30 minutes at a maximum ambient temperature of 24°C (75°F).
An E-PAC will normally be operated with speech or music programme,
complex signals where the average power requirement is belowpeak
power. The E-PAC will continue to operate indefinitely even where the
signal has a very low peak to RMS ratio, provided the device is installed
to enable the heat generated to be adequately dissipated.
3.7. Digital signal processing
The digital signal processing provides loudspeaker specific set ups that
are selected using the front panel controls. These set ups include all
loudspeaker equalization and protection functions. The basic latency of
the E-PAC is 1 msec. including conversion (AD/DA conversion).
3.8. Remote control
The REMOTE sockets can be used with either the dbCAN (CAN-Bus)
interface or with a serial interface to the d&b Remote Interface Bridge
(RIB) to integrate the E-PAC into a control and monitoring system.
E-PAC Amplifier, Hardware manual (1.2 EN) Page 8 of 24

4. Controls and indicators
OVLGRISP
LEVEL
PUSH MENU
MUTE
POWER 2
3
4
5
[4] [3] [2] [5][6][7] [1]
E-PAC Controls and indicators
4.1. Controls
4.1.1. Power switch [1]
[1]
Mains power switch
The on/off switch is located on the rear panel and isolates themains
power supply to the E-PAC. The MUTE/POWER switch [2] on the front
panel has the functions ON/MUTE/STANDBY and does not isolatethe
E-PAC from the mains power supply.
off:theE-PACisisolatedfromthemainspowersupplyexceptthe
overvoltage protection circuit. The power consumption is very low (2 W
typical).
on:theE-PACisswitchedon.ViaremoteortheMUTEcontroltheE-
PAC can be switched to standby mode. To indicate standby mode the
display remains active.
4.1.2. MUTE switch (green LED) [2]
OVLGRISP
LEVEL
PUSH MENU
MUTE
POWER 2
3
4
5
[3] [2]
Controls
When the rear panel mains power switch is set to the on position, the
combined MUTE/POWER switch can be used to place the E-PAC either
in mute or standby mode. The switch incorporates a green LED indicator
which indicates three different states - ON, MUTE and STANDBY.
-LED on » ON (unmuted):theE-PACispoweredonandready
for use. A brief press of the MUTE/POWER switch will mute the E-
PAC, a longer press places the E-PAC in standby mode.
-LED regular flashing (1:1 duty cycle): » MUTE:theE-PACis
muted. In the mute state, the input signal is muted but the power amp
is still powered and connected to the speaker output. The E-PAC is
unmuted by briefly pressing the MUTE/POWER switch. A longer
press of the MUTE/POWER switch will place the E-PAC in standby
mode.
-Regular short flashes (1:8 duty cycle): » STANDBY:
in standby mode the loudspeaker output is electronically isolated and
the E-PAC idles, drawing minimal mains power. Only the most
essential functions are provided. Display and network remain
functional, the display illumination is switched off after 10 seconds.
Pressing the MUTE/POWER switch powers on the E-PAC ready for
use. The E-PAC may also be powered back on by remote control
from standby mode.
E-PAC Amplifier, Hardware manual (1.2 EN) Page 9 of 24

IMPORTANT! When the E-PAC is set to STANDBY (or the mains power is turned off)
the movement of the loudspeaker cones in the cabinets connected is no
longer damped by the power amplifier output. This removal of the
damping makes them susceptible to excitation by other loudspeakers in
the surroundings. Audible resonances may occur, and even absorption
of low frequency sound energy as the undamped loudspeakers act like
a'basstrap'.Topermanentlymutesinglesubwoofercabinetsitis
therefore preferable to use the MUTE function instead of STANDBY.
The STANDBY mode, however, can be of advantage with mid-high
systems, because it will remove any residual noise from the system.
The MUTE/POWER switch is a 'soft' switch which doesn’t electrically
isolate the E-PAC from the mains supply. The E-PAC circuitry can be
electrically isolated from the mains supply by switching therearpanel
mains power switch to its off position.
The setting of the MUTE/POWER switch is stored in the E-PAC when the
mains power is turned off or disconnected. After reconnecting the E-
PAC it will revert to the same status as before disconnection.
4.1.3. LEVEL/PUSH MENU (Digital rotary encoder) [3]
Operation, configuration and status viewing of the E-PAC areall
accessed via the front panel digital rotary encoder; LEVEL/PUSH
MENU. In the main menu the encoder acts as a level control. Pushing or
turning the encoder gives access to different menu levels or enables
configurations or values to be entered.
Brief press: access to the menu level.
Adetaileddescriptionofthemenustructureandaccessisgiven in the
E-PAC Software manual, which is also provided with the E-PAC.
E-PAC Amplifier, Hardware manual (1.2 EN) Page 10 of 24

4.2. Indicators
4.2.1. LC Display [4]
OVLGRISP
[4] [5][6][7]
E-PAC Indicators in detail
Serves as a user interface and display for all configuration settings and
status information.
The display is illuminated and can be set to "on/off/timeout 10s."
Adetaileddescriptionofthemenustructureandaccessisgiven in the
E-PAC Software manual, which is also provided with the E-PAC.
4.2.2. ISP LED - Input Signal Present (green) [5]
Illuminates when the E-PAC input signal exceeds –30 dBu. The ISP
indication is unaffected by the setting of the level control and the MUTE
function but will not operate in STANDBY mode.
4.2.3. GR LED - Gain Reduction (yellow) [6]
Illuminates depending on the input signal:theE-PAClimiter
circuit reduces gain by more than 3 dB. This state is not critical but
shows that the system has reached its limits.
4.2.4. OVL LED - Overload (red) [7]
Illuminates depending on the input signal:
-While the green ISP-LED is lit » Overload:eithertheinput
signal level is too high or the E-PAC is trying to deliver too high an
output current. If in doubt of the reason reduce the input gainatthe
E-PAC level control. If the error message disappears, the output
current has been too high (load impedance too low caused by to
many loudspeakers connected to the E-PAC output, or a defective
cable or connector). If the condition does not change, the input signal
to the E-PAC is too high (greater than +23.5 dBu).
An overload could also be caused by accumulate the source input
INPUT+MIX IN or by high gain settings (boosts) in the single EQ
bands, while the input signal is lower than +23.5 dBu.
-Flashes (1:1 mark space) » Error:anerrormessagewillbe
displayed.
E-PAC Amplifier, Hardware manual (1.2 EN) Page 11 of 24

5. Connections
[8]
[9] [15 ][14 ][11][12 ][10 ][13 ]
5.1. Mains Connector [8]
IMPORTANT! Before connecting the device to mains voltage, check that themains
voltage and frequency corresponds to the specifications on the
configuration sticker on the rear of the E-PAC.
[8]
[9]
E-PAC Mains power
A3-pinIECsocketwithanintegratedfuseholderisprovidedfor
connecting the E-PAC to the mains power supply.
A suitable power cable is supplied.
5.2. Fuse protection [9]
Areplaceable20mmfuselocatedabovethe3-pinIECsocketis
integrated in the socket (5 A Time Lag (T)). This is connected in series to
the power supply and fails if the current drain is exceeded. There is a
spare fuse in the fuse holder.
WARNING! If the fuse has failed disconnect the E-PAC from the mains
supply before replacement.
Only use a fuse of the correct type and nominal current
value.
Before restoring power to the E-PAC all cabling should be checked for
faults. If in any doubt disconnect all signal and loudspeaker connections.
E-PAC Amplifier, Hardware manual (1.2 EN) Page 12 of 24

5.3. Signal inputs and link outputs
[15 ][14] [12] [13]
E-PAC I/O Connectors
All signal input and output connections are located on the rear panel.
These include analogue signal inputs (INPUT/MIX IN), link output (LINK)
and a NL4 loudspeaker output (SPEAKER OUT).
5.3.1. INPUT [12] and LINK [13]
Pin assignment E-PAC signal inputs
The E-PAC signal input connector is a 3 pin female XLR.
Below and wired in parallel is a 3 pin male XLR input link connector used
to feed the input signal on to the next device in the system signal chain.
5.3.2. MIX IN [14]
A3pinfemaleXLRconnectorprovidesaMIXINinput.Asecondsignal
fed to this input is summed to the main INPUT. If Left and Right
components of a stereo source are fed to the main INPUT and MIX IN
connections then a mono sum signal is derived from the speakeroutput.
Please note that the resultant output is 3 dB higher.
The output on the INPUT LINK connector is derived from the signal fed
to the INPUT connector. An additional signal fed to the MIX IN
connector will not appear at the INPUT LINK output.
5.4. Loudspeaker output connectors - [15]
The E-PAC is fitted with a single Speakon-NL4 speaker output
connector. With configuration settings which transmit full-range signal
(e.g. E3 or LINEAR) all four pins on the Speakon connector are driven,
pins 1+ and 2+ carry positive signal, 1– and 2– carry negative signal.
With SUB configurations selected pin 1+ is disconnected automatically.
This prevents mid-high cabinets from accidental damage by subwoofer
signal.
E-PAC Amplifier, Hardware manual (1.2 EN) Page 13 of 24

5.5. REMOTE interface [14]
[11] [10]
E-PAC Remote interfaces
5.5.1. REMOTE [10]
1......8 1......8 Pin 1 n.c.
Pin 2 n.c.
Pin 3 n.c.
Pin 4 CAN_H
Pin 5 CAN_L
Pin 6 n.c.
Pin 7 RIB Data +
Pin 8 RIB Data -
Shield CAN Ground
18
......
Pin assignment for remote control (RJ45)
The E-PAC is fitted with a two-wire serial remote control interface, (2 x
RJ 45) carrying both the RIB and CAN-Bus signals. All pins of both
connectors are wired in parallel allowing either to be used astheinput
or output. Where remote control networking conforms to a 'BusorRing
topology' one connector is used for the incoming signal and the second
connector allows for direct connection to another device or for
terminating in case of a CAN-Bus network. The interface connections for
the RIB (pin 7/8) are opto-coupled, while the connections fortheCAN-
Bus (pin 4/5) are hard wired to common ground (protective earth).
Pin Signal Remark
1-
2-
3-
4CAN_H"CANhighbus"signal(activehigh)
5CAN_L"CANlowbus"signal(activelow)
6-
7RIBData
8RIBData
Enclosure GND CAN Ground
RJ45 pin assignment on d&b devices
The "CAN Ground" is routed via the cable shielding. Within theCAN-
Bus network, shielded cables and shielded RJ 45 connectors must be
used while the cable shielding must be connected to both sidesofthe
RJ 45 connector.
AdetaileddescriptionofremotecontrolviadbCAN(CAN-Bus)isgiven
in the technical information TI 312 (d&b code D5312.E.).
5.6. SERVICE [11]
The D-SUB-9 SERVICE interface (RS 232 female) allows operating
software and loudspeaker configuration updates to be loadedintothe
unit.
IMPORTANT! To connect the computer to the SERVICE connector a standard RS-232
connection cable (D-SUB-9 serial cable female/male - 1:1) must be
used (serial extension cable).
Pin Signal Remark
2RxD
3TxD
4DTR
5 GND Signal
7RTS
E-PAC Amplifier, Hardware manual (1.2 EN) Page 14 of 24

6. Installation and operation
6.1. Installation
AsingleE-PACmaybeinstalledina9.5"equipmentrackorastandard
19“ equipment rack or flightcase. A single E-PAC or a pair side-by-side
may be installed in a standard 19" equipment rack or flightcase. E-PACs
require two rack units and, including connectors, a minimum rack depth
of 40 cm (16"), mounting ear to rack rear panel.
E-PAC with solo rack mount kit
(Z2501)
E-PACs with dual rack mount kit (Z2502) E-PACs with 9.5” rack mount kit
(Z2503)
IMPORTANT! It is recommended that additional support be provided withintherack
by using the rear mounted rack ears [3]. This is particularly important if
E-PACs are being racked for road use.
The E-PAC enclosure can get hot during operation, therefore allow a
gap of at least 2 cm (3/4") between an E-PAC and the rack top/bottom
panels, or other equipment above or below (see figure on the left). This
is not necessary between adjacent E-PACs.
When installing E-PACs always allow sufficient free air flowaroundthe
enclosure and never block or cover the rear panel air intake vent or the
front panel air outlet vent. If E-PACs are to be installed in sealed
equipment racks, then additional fan modules will be needed.TheE-
PAC air intake is on the rear panel; therefore external fans should
supply air to the rear side of the rack.
2 cm / 0.8" Vent
2 cm / 0.8" Vent
OVLGRISP
E-PAC
LEVEL
PUSHMENU
MUTE
POWER
OVLGRISP
E-PAC
LEVEL
PUSHMENU
MUTE
POWER
OVLGRISP
E-PAC
LEVEL
PUSHMENU
MUTE
POWER
OVLGRISP
E-PAC
LEVEL
PUSHMENU
MUTE
POWER
cooling air
100 mm [4"]
free space
338 mm
[13.3"]
support
on both
sides
20 mm [3/4"]
vent below
20 mm [3/4"]
vent above
Convection type cooling.
Enclosure can get
hot during operation.
CAUTION !
E-PAC Rack mounting / Installation
E-PAC Amplifier, Hardware manual (1.2 EN) Page 15 of 24

6.1.1. E-PAC Rack mount kits
[1]
[2]
[3] [4]
[5]
[K]
E-PAC Rack mounting kit items
The solo rack mount kit Z2501 allows one E-PAC to be mounted either
to the left or the right hand side in a standard 19" equipment rack or
flightcase.
The solo rack mount kit (Z2501) includes the following parts:
-4xmountingrails[1]
-1xfrontrackmountingbracket[2]
-1xrearmountedrackear[3]
-1xfrontblankingpanel[5]
-6xAllenscrews[S]
-1xAllenkey[K]
The dual rack mount kit Z2502 allows two EPACs side-by-side to be
mounted in a standard 19" rack or flightcase.
The dual rack mount kit (Z2502) includes the following parts:
-8xmountingrails[1]
-2xfrontrackmountingbrackets[2]
-2xrearmountedrackears[3]
-2xconnectorbrackets[4]
-16xAllenscrews[S],
-1xAllenkey[K]
The solo rack mount kit Z2503 allows one E-PAC to be mounted in a
9.5“ equipment rack or flightcase.
The solo rack mount kit (Z2503) includes the following parts:
4 x mounting rails [1]
2 x front rack mounting brackets [2]
2 x rear mounted rack ears [3]
8 x Allen screws [S]
1 x Allen key [K]
Assembly
[1]
[2]
[S]
The mounting rails [1] are inserted into channels located in the side
walls of the E-PAC aluminum enclosure. The different fittings
[2,3,4 and 5] are attached using countersunk Allen (Hex) screws [S]
using the supplied Allen key [K].
E-PAC Amplifier, Hardware manual (1.2 EN) Page 16 of 24

6.2. Dimensions
OVLGRISP
E-PAC
LEVEL
PUSH MENU
MUTE
POWER
REMOTE
Made in Germany
MIX IN INPUTSPEAKER OUT INPUT LINK
SERVICE
www.dbaudio.com
CAUTION
RISKOF ELECTRIC SHOCK
DO NOT OP EN
E-PAC
Z2500000101236
E-PAC front view E-PAC rear view
483 [19.00"]
465 [18.30"]
76 [3.00"]
OVLGRISP
E-PAC
LEVEL
PUSH MENU
MUTE
POWER
OVLGRISP
E-PAC
LEVEL
PUSH MENU
MUTE
POWER
190 [7.48"] 336 [13.23"]
88 [3.46"]
OVLGRISP
E-PAC
LEVEL
PUSH MENU
MUTE
POWER
88 [3.46"]
338 [13.31"]
357 [14.06"]240 [9.45"]
222 [8.74"]
76 [3.00"]
OVLGRISP
E-PAC
LEVEL
PUSH MENU
MUTE
POWER
E-PAC enclosure dimensions in mm [inch]
E-PAC Amplifier, Hardware manual (1.2 EN) Page 17 of 24

6.3. Operation
6.3.1. Electromagnetic compliance
The device complies with the electromagnetic compatibilityrequirements
of EN 55103 (product family standard for audio, video, audio-visual
and entertainment lighting control apparatus for professional use) for
the environments E1 (residential), E2 (business and commercial), E3
(outdoor use in urban areas) and E4 (outdoor use in rural areas).
Acoustic interference and malfunctions may occur if the unitisoperated
in the immediate vicinity of high-frequency transmitters (e.g. wireless
microphones, mobile phones, etc.). Damage to the mainframe is unlikely,
but cannot be excluded.
6.3.2. Power consumption and power loss
The power required from the mains supply and the waste heat
produced by the amplifiers power loss are variable figures depending
on the load impedance and the signal levels and characteristics (e.g.
speech, music).
In practice, the theoretical peak power consumption of a system will
only be sustained for a short period of time. Basing mains current and
air conditioning plant requirements on the peak power consumption of
the sound system would result in a generously over-specified
installation. The key factor in power consumption calculations is the crest
factor of the signal - the ratio of peak to sustainable RMS voltage of the
signal.
Power input and electrical (⇒thermal) power loss for different signal
and load conditions can be derived from the graphs shown below.
196
80
50
300
120
78
--
159
60
34
102
86
47
156
125
85
123
118
79
1.4 2.8 3.5 1.4 2.8 3.5 1.4 2.8 3.5
0
100
200
300
400
500
Cre st f ac t or
4 ohms (LO IMP)8 ohms
16 ohms
power [W]
loss
output
Maximum output power and power loss of E-PAC for different signal
characteristics (Crest factors) at full level.
E-PAC Amplifier, Hardware manual (1.2 EN) Page 18 of 24

510 100 200
30
100
400
consumption
loss
power [W]
average output power [W]
510 100 200
30
100
400
consumption
loss
power [W]
average output power [W]
Power consumption and loss of E-PAC as a factor of output
power (WRMS into 8 ohms) with pink noise signal
Average power consumption and loss of E-PAC as a factor of
output power (WRMS into 16 ohms) with pink noise signal
E-PAC Amplifier, Hardware manual (1.2 EN) Page 19 of 24