D&B D6 User manual

D6 Amplifier
Hardware manual (1.2EN)

Symbols on the e uipment
Please refer to the information in the operating
manual.
WARNING!
Dangerous voltage!
General Information
D6 Amplifier
Hardware manual
Version 1.2EN, 11/2007, D2017.EN.01
Copyri ht © 2007 by d&b audiotechnik AG; all ri hts reserved.
Keep this manual with the product or in a safe place so that it is
available for future reference.
In the case of resellin 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 AG
Eu en-Adolff-Strasse 134, D-71522 Backnan , Germany
Telephone [phone], Fax [phone]
E-mail: [e-mail], Internet: www.dbaudio.com

Contents
1. Introduction......................................................................4
1.1. Intended use...............................................................................................4
1.2. Scope of supply.........................................................................................4
1.3. Maintenance/Service...............................................................................4
2. D6 Amplifier.....................................................................5
2.1. D6 based systems.....................................................................................5
2.2. Block dia ram............................................................................................5
2.3. Power supply..............................................................................................6
2.3.1. Inrush current limiter.....................................................................6
2.3.2. Mains volta e monitorin ...........................................................6
2.4. Fan.................................................................................................................6
2.5. D6 power amplifiers.................................................................................6
2.6. Di ital si nal processin ..........................................................................6
2.7. Remote control...........................................................................................6
3. Controls and indicators....................................................7
3.1. Controls........................................................................................................7
3.1.1. Power switch...................................................................................7
3.1.2. MUTE A/B switch ( reen LED)...................................................7
3.1.3. LEVEL/PUSH MENU (Di ital rotary encoder).......................8
3.2. Indicators.....................................................................................................9
3.2.1. LC Display........................................................................................9
3.2.2. ISP LED (A/B) - Input Si nal Present ( reen)..........................9
3.2.3. GR LED (A/B) - Gain Reduction (yellow).................................9
3.2.4. OVL LED (A/B) - Overload (red)..............................................9
4. Connections....................................................................10
4.1. Mains Connector....................................................................................10
4.2. Si nal inputs and link outputs.............................................................10
4.2.1. INPUT A/B and LINK A/B.........................................................10
4.2.2. INPUT DIGITAL AES/EBU and LINK......................................11
4.3. Loudspeaker output connectors - OUT A/B...................................11
4.4. REMOTE interface..................................................................................12
4.5. SERVICE.....................................................................................................12
5. Installation and operation............................................13
5.1. Rack mountin .........................................................................................13
5.2. Operation.................................................................................................14
5.2.1. Power consumption and power loss......................................14
5.2.2. Mains supply................................................................................15
5.2.3. Operatin conditions.................................................................15
6. Technical specifications..................................................16
6.1. Dimensions................................................................................................18
7. Manufacturers declarations..........................................19
7.1. EU declaration of conformity (CE symbol).......................................19
7.2. WEEE declaration (Disposal)...............................................................19
D6 Amplifier, Hardware manual (1.2EN) Contents - 1

1. Introduction
This manual describes the facilities and basic functions of the hardware
of the D6 amplifier. A detailed description of the D6 software (firmware)
menu structure and access is iven in the D6 Software manual, which is
also provided with the D6.
1.1. Intended use
The D6 amplifier is a two channel power amplifier and controller unit. It
is desi ned for use with all current d&b loudspeakers except 2-Way
Active and B2-SUB setups. A linear mode is available allowin the D6
to be used as a linear power amplifier.
NOTICE: The device complies with the electroma netic compatibility
requirements of EN 55103 (product family standard for audio, video,
audio-visual and entertainment li htin 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 unit is operated
in the immediate vicinity of hi h-frequency transmitters (e. . wireless
microphones, mobile phones, etc.). Dama e to the unit is unlikely, but
cannot be excluded.
1.2. Scope of supply
Before startin up please verify the shipment for completeness and
condition of the unit:
Qty. d&b Code Description
1 Z2700.000 D6 Amplifier
1 Z2610.xxx Power cord D6 (specific to country)
1 D2017.EN D6 Amplifier, Hardware manual
1 D2018.EN D6 Amplifier, Software manual
For any sign of obvious damage to the unit and/or the power
cord durin shipment under no circumstance connect and operate the
unit. Please contact your local dealer from whom you received the unit.
1.3. Maintenance/Service
CAUTION: Do not open the unit. No user serviceable parts inside. In
the case of any dama e to the unit under no circumstances connect and
operate the unit.
Refer servicin only to qualified service personnel authorized by
d&b audiotechnik. In particular in the case of:
- objects or liquids have entered the unit.
- the unit is not operatin normally.
- the unit was dropped or the housin is dama ed.
D6 Amplifier, Hardware manual (1.2EN) Page 4 of 20

2. D6 Amplifier
Fig. 1: D6 Amplifier
2.1. D6 based systems
The D6 Amplifier incorporates:
- universal volta e, switch mode power supply with active power
factor correction (PFC)
- two channel Class D power amplifier
- di ital si nal processors (DSP)
- comprehensive protection circuits
- controls and indicators
- analo and di ital si nal inputs and link outputs
- REMOTE and SERVICE interface
The level control on the front panel incorporates a di ital rotary
encoder, which enables selection of all operatin modes in conjunction
with a Liquid Crystal Display (LCD).
User definable equalization and delay functions are incorporated in
each channel of the D6. The 4-band parametric equalizer provides
optional Boost/Cut or Notch filterin and the si nal delay capability
allows delay settin s of up to 340 ms (= 100 m / 328 ft) to be applied
independently to either channel. A si nal enerator offerin pink noise
or sine wave pro ram is also incorporated for test and ali nment
purposes. Each unit can be iven a unique Device Name to simplify
identification and a password protected LOCK function is also
incorporated to inhibit unauthorized set up chan es.
The D6 is housed in a 19" x 351 mm (13.8") 2 rack unit enclosure made
from steel.
2.2. Block diagram
Power
amplifier
Input
routing
Analog A
Analog B
Digital A
Digital B
Signal
generator
sine wave or
pink noise for
acoustic tests
Input
monitoring
1+/2+
1-/2-
User
EQ
Delay
t
Dynamics
Coil temp.
t°
Power supply
Information
on headroom,
temperature,
power, mains
voltage
Excursion
Channel B
System
EQ/XO
pilot signals
for load
monitoring
Channel A
LC Display
Input
Ch A
Ch B
Link A>B
analog
> LINEAR
off
D6
remote
interface
uC
> LINEAR
1+/2+
1-/2-
Z analysis
for load
monitoring
I
D6 Amplifier, Hardware manual (1.2EN) Page 5 of 20

2.3. Power supply
The switch mode mains power supply permits worldwide application
without the need for mains volta e switchin or conversion. The power
supply incorporates active Power Factor Correction (PFC) which
provides a clean and hi hly efficient sinusoidal current draw, thus
providin hi hest performance under adverse mains conditions or when
very lon power cablin is necessary.
2.3.1. Inrush current limiter
A mains inrush current limiter provides a "soft start" and enables
several units to be powered up at the same time without overloadin
the mains power supply.
2.3.2. Mains voltage monitoring
The mains volta e and frequency are recorded by the power supply
and can be viewed on the LCD display. Where volta es outside of this
ran e are present, a self-resettin protective circuit responds quickly to
isolate the internal amplifier power supply leavin only a supervisory
circuit to monitor the mains volta e. The D6 accepts mains volta es of
up to 400 VAC without dama e to the unit.
2.4. Fan
A level and temperature controlled fan is incorporated for coolin the
internal components, which allows reater coolin durin louder
pro ram material. The fan speed is consequently reduced durin quieter
passa es preventin back round noise interference. If the D6 heats up
a "Temp. Warnin " is iven out and the fan will ive full coolin power
permanently.
2.5. D6 power amplifiers
The two power amplifiers fitted to the D6 are utilizin Class D
technolo y similar to a switch mode power supply. Compared to the
known linear amplifier concept (Class A, AB, G or H) the Class D power
amplifiers produce less heat and allows for a compact and li ht wei ht
desi n.
The rated sine wave output power of each channel is 2 x 600 W into an
4 ohms load, decreasin to 2 x 350 W into a 8 ohms load.
2.6. Digital signal processing
The di ital si nal processin provides loudspeaker specific setups that
are selected usin the front panel controls. These setups include all
loudspeaker specific equalization and protection functions. The basic
latency of the D6 is 0.3 ms (analo input includin AD/DA conversion).
2.7. Remote control
The REMOTE interface (2 x RJ 45) can be used with the d&b Remote
network (CAN-Bus) to inte rate the D6 into a control and monitorin
system.
D6 Amplifier, Hardware manual (1.2EN) Page 6 of 20

3. Controls and indicators
3.1. Controls
3.1.1. Power switch
The power switch [1] is a rocker switch type. It does not isolate the unit
from mains power.
-OFF
The unit is switched off except the overvolta e protection circuit. The
power consumption is low (1 W typical).
-ON
The unit is switched on and ready for operation.
3.1.2. MUTE A/B switch (green LED)
When the mains power switch is set to the on position, the MUTE A/B
switches (push buttons) [2] can be used to mute the respective amplifier
channel or place the D6 in Standby mode.
Note: The settin of the MUTE A/B switch is stored in the D6 when the
mains power is turned off or disconnected. After switchin on or
reconnectin the unit it will revert to its previous status.
MUTE / STANDBY
- A brief press of the MUTE (A or B) switch will mute the correspondin
channel A or B. The channel is unmuted by briefly pressin the
correspondin MUTE switch.
- A lon er press (approx. 1.5 s) of MUTE A or B places the D6 in
Standby mode. Briefly pressin the MUTE A or B switch a ain powers
on the D6 ready for use. The D6 may also be powered back on by
remote control from Standby mode.
D6 Amplifier, Hardware manual (1.2EN) Page 7 of 20

Status indication
The switch incorporates a reen LED indicator which indicates three
different states – ON, MUTE and STANDBY.
-LED illuminates permanently ⇒ ON (unmuted)
The D6 is ready for use.
-LED regular flashing (1:1 duty cycle): ⇒ MUTE
The correspondin channel of the D6 is muted however the power
amplifiers remain powered but receive no si nal from the controller.
A connected loudspeaker is therefore still damped.
-Regular short flashes (1:8 duty cycle): ⇒ STANDBY
In Standby mode the loudspeaker outputs are electronically isolated
and the D6 idles, drawin minimal mains power. Only the most
essential functions are provided. Display and network remain
functional, the display illumination will be switched off after 10 s.
Note: When the D6 is set to STANDBY (or the mains power is turned
off) the movement of the loudspeaker cones in the cabinets connected is
no lon er damped by the power amplifier output. This removal of the
dampin makes them susceptible to excitation by other loudspeakers in
the surroundin s. Audible resonances may occur, and even absorption
of low frequency sound ener y as the undamped loudspeakers act like
a "bass trap". To permanently mute sin le subwoofer cabinets when
others are operated at the same time it is therefore preferable to use
the MUTE function instead of STANDBY. The Standby mode, however,
can be of advanta e with mid/hi h systems, because it will remove any
residual noise from the system.
3.1.3. LEVEL/PUSH MENU (Digital rotary encoder)
Operation, confi uration and status viewin of the D6 are all accessed
via the front panel di ital rotary encoder - LEVEL/PUSH MENU [3]. In
the main menu the encoder acts as a level control. Pushin or turnin
the encoder ives access to different menu levels or enables
confi urations or values to be entered.
Brief press
Alternatin between level control of channel A or B.
Long press (approx. 1 s)
Access to the menu level. A detailed description of the D6 menu
structure and access is iven in the D6 Software manual, which is also
provided with the D6.
D6 Amplifier, Hardware manual (1.2EN) Page 8 of 20

3.2. Indicators
3.2.1. LC Display
The LC-Display [4] serves as a user interface and display for all
confi uration settin s and status information.
The display is illuminated and can be set to "on/off/timeout 10 s."
A detailed description of the menu structure and access is iven in the
D6 Software manual, which is also provided with the D6.
3.2.2. ISP LED (A/B) - Input Si nal Present (green)
Input - analog
The ISP LED [5] Illuminates when the D6 input si nal exceeds –30 dBu.
The ISP indication is unaffected by the settin of the level control and
the MUTE function but will not operate in STANDBY mode.
Input - digital
Illuminates when the D6 di ital input is locked to 48 or 96 kHz and the
si nal exceeds –57 dBFS (FS = Full Scale). The ISP indication is
unaffected by the settin of the level control and the MUTE function but
will not operate in STANDBY mode.
3.2.3. GR LED (A/B) - Gain Reduction (yellow)
The GR LED [6] illuminates dependin on the input si nal. The D6 limiter
circuit reduces ain by more than 3 dB. This state is not critical but
shows that the system has reached its limits.
3.2.4. OVL LED (A/B) - Overload (red)
The OVL LED [7] illuminates dependin on the input si nal ⇒Overload.
Either the input si nal level is too hi h or ain reduction exceeds
>12 dB.
- If in doubt reduce the input ain at the D6 level control. If caused by
the ain reduction, the OVL LED stops illuminatin . If the condition
does not chan e, the input si nal to the D6 is too hi h ( reater than
+25 dBu).
An overload could also be caused by accumulatin the source input
A+B or by hi h ain settin s (boosts) in the sin le EQ bands, while the
input si nal is lower than +25 dBu.
Flashes (1:1 mark space) ⇒ Error
An error messa e will be displayed alterin with the device name.
D6 Amplifier, Hardware manual (1.2EN) Page 9 of 20

4. Connections
D6
VOLTAGE SEE LABEL
~ 50/60 Hz, 1000 W
MAINS SUPPLY
DIGITAL AES/EBU ANALOG
OUT
B
OUT
A
CH A
CH B
SERVICEREMOTE
4.1. Mains Connector
The D6 is a protective class 1 unit.
WARNING!
A missin earth ( round) contact may lead to dan erous
volta es in the housin and controls and may lead to electric
shock.
- The unit must only be connected to mains volta e supply with
protective earth.
D6
VOLTAGESEE LABEL
~50/60 Hz, 1000 W
MAINSSUPPLY
DIGITAL AES/EBU ANALOG
OUT
B
OUT
A
CHA
CHB
SERVICEREMOTE
D6
ÉZ2700.000WË
D6
100-127V / 220-240V
Z270000000001
WEEE
0615
APowerCon
®1 mains connector [8] is fitted on the rear panel and an
appropriate mains lead is supplied.
Before connectin the device to mains volta e, check that the mains
volta e and frequency correspond to the specifications on the
confi uration sticker on the rear of the D6.
CAUTION: For any si n of obvious dama e to the power cord and or
mains connector the power cord must not be used and must be
exchan ed before further use of the unit.
4.2. Signal inputs and link outputs
NOTICE: To meet the EMC requirements only shielded cablin and
proper fitted connectors must be used.
4.2.1. INPUT A/B and LINK A/B
Fig. 2: Pin assignment ANALOG INPUT/LINK
A 3 pin female XLR input connector [9] is provided for channel A and B.
The inputs are electronically balanced.
Wired in parallel is a 3 pin male XLR input link connector [10] used to
feed the input si nal on to the next device in the system si nal chain.
1PowerCon
® is a re istered trademark of the Neutrik AG, Liechtenstein
D6 Amplifier, Hardware manual (1.2EN) Page 10 of 20

4.2.2. INPUT DIGITAL AES/EBU and LINK
Fig. 3: Pin assignment DIGITAL INPUT/LINK
Digital INPUT
(AES/EBU)
Digital LINK
Power fail (Bypass)
Buffer
Fig. 4: Digital INPUT Bypass
A 3 pin female XLR AES/EBU [11] (AES 3) input and a 3 pin male XLR
LINK output [12] is provided.
The balanced input utilizes a transformer and is electrically isolated.
The di ital LINK output may be used to feed a refreshed input si nal to
the next device in the system si nal chain. The si nal shape (the risin
and trailin ed es of the si nal) and level are refreshed with an analo
si nal amplifier.
A power fail relay is incorporated to prevent interruption of the si nal
chain should there be a power failure. In this situation, the di ital input
si nal bypasses the analo buffer amplifier and is routed directly to the
LINK output.
4.3. Loudspeaker output connectors - OUT A/B
WARNING!
The amplifier's output pins can carry dan erous volta es.
- 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 ( round). This mi ht lead to
electric shock or dama e the unit.
AMP A
OUT A
INPUT A
AMP B
OUT B
INPUT B
Fig. 5: NL4 Loudspeaker output
connectors and channel assignment
The D6 amplifier is supplied with NL4 output connectors [13]. Pins
1+/2+ and 1—/2— are wired in parallel and carry si nal.
Pin equivalents of the amplifier's output connectors and the type of
loudspeaker cabinets are listed in the table below.
D6 Output NL4 Speaker type NL4
+ 1 + / 2 + TOP + 1 +
— 1 — / 2 — TOP — 1 —
Tab. 1: D6 pin assignment SUB + 2 +
SUB — 2 —
Tab. 2: Pin assignment
loudspeaker
D6 Amplifier, Hardware manual (1.2EN) Page 11 of 20

4.4. REMOTE interface
The D6 is fitted with a 2-wire serial remote control interface, (2 x RJ 45
[14]) carryin CAN-Bus si nals.
All pins of both connectors are wired in parallel allowin either to be
used as the input or output. Where remote control networkin conforms
to a "Bus or Rin topolo y" one connector is used for the incomin
si nal and the second connector allows for direct connection to another
device (daisy chainin ) or for terminatin the last device at the end of a
CAN-Bus se ment.
The reference round of the CAN-Bus is hard wired to common round
(protective earth) of the device.
Pin Signal Remark
1-
2-
3-
4 CAN_H "CAN hi h bus" si nal (active hi h)
5 CAN_L "CAN low bus" si nal (active low)
6-
7-
8-
Enclosure GND CAN Ground
The "CAN Ground" is routed via the cable shieldin . Within the CAN-
Bus network, shielded cables and shielded RJ 45 connectors must be
used while the cable shieldin must be connected to both sides of the
RJ 45 connector.
A detailed description of remote control via the d&b Remote network
(CAN-Bus) is iven in the technical information TI 312 (d&b code
D5312.E.) which can be downloaded form the d&b website under
www.dbaudio.com.
4.5. SERVICE
The SERVICE interface [15] (USB type B connector) allows operatin
software and loudspeaker confi uration updates to be loaded into the
unit.
A detailed description of the update procedure is iven in the D6
Software manual, which is also provided with the D6.
D6 Amplifier, Hardware manual (1.2EN) Page 12 of 20

5. Installation and operation
NOTICE: Observe the followin conditions and ensure that ...
- no moisture or liquids will enter the unit
e. . rain, excessive humidity or steam, oil steam or splashes or
knocked over liquids (e. . Drinks)
- no additional heat will have an impact to the unit
e. . excessive heat from additional equipment or direct sunli ht
- no dust or other small particles will enter the unit. In combination with
moisture this could lead the unit to malfunction.
Observe the operatin conditions and limits as iven in the technical
specifications.
5.1. Rack mounting
D6 amplifier enclosures are desi ned to fit into a standard 19"
equipment rack or cabinet.
When specifyin a rack, be sure to allow extra depth (10 cm / 4" is
usually sufficient) to accommodate the cables and connectors at the rear
of the amplifier.
When mountin amplifiers into a 19" rack cabinet, do not just rely on
fixin and supportin amplifiers by their front panels. Provide additional
support ...
- usin shelves fixed to the inner sides of the cabinet
- or the mountin holes provided on the amplifier rear mounted rack
ears.
This advice is particularly important if amplifiers are bein racked up for
tourin use.
C
oo
l
a
ir int
a
k
e
3
4
8
m
m
[13 7
"
]
19"
2 R
U
100 mm
[
4"
]
free s
p
ac
e
airflow
support
on both
sides
Please ensure, whatever the mountin or rackin arran ement, that
adequate cool airflow is provided to avoid a build-up of hot air inside
the rack leadin to overheatin . When settin up the amplifier, do not
block or cover the rear panel air intake or the vents on the front panel
of the amplifier.
If amplifiers are installed in cabinets we recommend usin additional fan
modules with front mounted filters that can be easily replaced without
openin the sealed cabinets.
D6 Amplifier, Hardware manual (1.2EN) Page 13 of 20

5.2. Operation
5.2.1. Power consumption and power loss
The power required from the mains supply and the waste heat
produced by the amplifiers power loss vary dependin on the load
impedance and the si nal levels and characteristics (e. . speech, music).
In practice, the theoretical peak power consumption of a system will
only be sustained for a short period of time. Basin mains current and
air conditionin plant requirements on the peak power consumption of
the sound system would result in a enerously over-specified
installation. The key factor in power consumption calculations is the crest
factor (CF) of the music or speech si nal - the ratio of peak to
sustainable RMS volta e of the si nal.
A crest factor of 2.4 represents 1/3 of the maximum sine output power
and it can be seen as the worst case si nal that can be accessed in real
world conditions. A proper power distribution should be able to handle
the current ratin s iven in the table below referrin to CF 2.4. Usin
the D6 temporarily with well known si nals of hi her crest factor, the
power distribution can be downsized within the ran e iven in the table.
The table ives power fi ures for various types of si nal waveforms.
They were measured on a D6 drivin a 4 ohm load (both channels) to
the clippin point of both channels usin a sine wave burst si nal of
24 dBu with a variable duty cycle. The mains power supply used for the
measurements supplied an ideal sine wave with 230 V/50 – 60 Hz at
an internal resistance of 0.5 ohms (0.12/0.1 ohms for 115/100 V)
equivalent to a mains lead of 20 m (65.6 ft) with a cross section of
1.5 mm2 (6 mm2 / 8 mm2 for 115/100 V).
Signal
waveform
CF Duty Pout [W] Pin [W] Ploss [W] Iin [A] Uin [V]
Sinus 1.4 1/1 1200 1560
1645
1715
360
445
515
6.8
14.3
17.2
230
115
100
Hi hly compressed
music*
2.4 1/3 400 520
550
570
120
150
170
2.3
4.8
5.7
230
115
100
Music with low
dynamic ran e
4.0 1/8 150 215
220
220
65
70
70
1.0
2.0
2.2
230
115
100
Tab. 3: D6 Power balance
Key:
CF: Crest factor, Duty: Duty cycle, Pout[W]: Max. avera e output power (sum of both channels), Pin[W]: Input power (effective power)
Ploss: Power loss (thermal power), Iin[A]: Resultin current, Uin [V]: Mains volta e
* Maximum practicable operation
D6 Amplifier, Hardware manual (1.2EN) Page 14 of 20

5.2.2. Mains supply
The table below indicates the number of devices per phase conductor
when full output power is required.
Mains supply Number of devices
230 V / 16 A Max. 4
115/100 V / 15 A Max. 2
In the USA and Japan we recommend the use of mains leads with a
hi h cross section (min. 4 mm2 / AWG 12).
5.2.3. Operating conditions
The followin dia ram shows the thermal operatin ran e within which
the technical data will be maintained. The operation beyond this ran e
is possible for a short time and for thermal reasons this will tri er the
amplifier protection circuit into thermal overload.
Fig. 6: Average maximum total output power vs. ambient temperature
As explained in section 5.2.1, a worst case si nal with a CF of 2.4 is
producin 1/3 of the rated sine output power or 200 watts at 4 ohms
per channel (400 watts total).
- The thermal mana ement of the D6 is desi ned to deliver this power
for an unlimited amount of time within an ambient temperature of
up to 40° C (104° F).
-With higher ambient temperatures, the maximum avera e
output power that can be delivered without enterin thermal
protection, is reducin linearly as shown in the dia ram above.
- When usin the D6 at its upper temperature limit of 45° C
(113° F), the maximum continuous output power is 340 watts total
or 170 watts per channel.
A ain referrin to section 5.2.1 - Tab. 3 - "D6 Power balance" - the unit
will work properly with e. . 150 watts total when either
- runnin 4 ohms loads when the si nal has a CF of 4.0
- or runnin 8 ohms loads if the worst case si nal with a CF of 2.4
needs to be handled.
The maximum possible output power of 2 x 600 W at 4 ohms, which for
thermal reasons could only be supplied in short term (within minutes), is
unaffected by the ambient temperature.
D6 Amplifier, Hardware manual (1.2EN) Page 15 of 20

6. Technical specifications
Displays
ISP A/B..................................................................Input Si nal Present indicator ( reen)
GR A/B.........................................................................Gain Reduction indicator (yellow)
OVL A/B...........................................................................Overload/Error indicator (red)
MUTE A/B......................................................................Mute/Standby indicator ( reen)
Liquid Crystal Display (LCD).....................................Graphic display / 120 x 32 Pixel
Controls
POWER..............................................................................................................Power switch
MUTE A/B........................................................................................Mute /Standby switch
LEVEL/PUSH MENU......................................................................Di ital rotary encoder
access to all functions (Channel A /B) includin :
Level control..................................–57.5 dB to +6 dB with 0.5 dB detents
Input matrix.........................................................................................A, B, A+B
Functions.......................Loudspeaker specific circuits CUT/HFA/HFC/CPL
4-band equalizer...........................................................Optional PEQ/Notch
Delay settin ..........................................0.3 to 340 ms with 0.1 ms detents
Confi urations......................Current d&b loudspeakers and linear mode
.....................................................except 2-Way Active and B2-SUB setups
Channel couplin .....................common access to Delay, EQ, Delay+EQ
Protection..............................Operator input inhibit /password protection
Remote control.....................................................................................CAN-Bus
Device name................................................................15 alphanumeric di its
Display illumination......................................................Off/On/Timeout 10 s
Frequency enerator..............Pink noise or Sine wave, 10 Hz to 20 kHz
...........with 1 Hz detents, Level: –57.5 dB to +6 dB with 0.5 dB detents
Buzzer.......................................................Audible si nal for error messa es
Monitoring according to IEC 60849
‘Sound Systems for Emergency Purposes’
Input monitorin ................................................................Detectin external Pilot si nal
Load monitorin .......................................................Continuous impedance monitorin
..............................................................................usin Pilot si nal at 10 Hz and 20 kHz
System check..............................................................Manual impedance measurement
...........................................................................to calibrate before, and verify after use
Connectors
INPUT ANALOG CH A / CH B...........................................................XLR 3-pol. female
.........................................Pin assi nment: 1 = GND, 2 = pos. si nal, 3 = ne . si nal
Input impedance.......................................................44 kohms, electronically balanced
Input CMRR, 100 Hz...........................................................................................< – 70 dB
Input CMRR, 10 kHz............................................................................................< – 50 dB
Maximum input level..............................................................................................+25 dBu
LINK ANALOG CH A / CH B................................................................XLR 3-pol. Male
.........................................Pin assi nment: 1 = GND, 2 = pos. si nal, 3 = ne . si nal
.......................................................................................................................parallel to input
INPUT DIGITAL AES/EBU.......................................................XLR 3-pol. female, AES 3
.........................................................Pin assi nment: 1 = GND, 2 = Si nal, 3 = Si nal
Input impedance.........................................................110 ohms, transformer balanced
Synchronization.................................Word-Sync: PLL-locked to source (slave mode)
LINK DIGITAL (Output).............................................................................XLR 3-pol. male
..........................................................................................................electronically balanced
..........................................................................................................analo si nal bufferin
.......................................................................................................power fail relay (Bypass)
.........................................................Pin assi nment: 1 = GND, 2 = Si nal, 3 = Si nal
D6 Amplifier, Hardware manual (1.2EN) Page 16 of 20

OUT A/B...........................................................................................................................NL4
.....................................................................................Pin assi nment: 1+/2+: Output +
.....................................................................................................................1–/2–: Output –
REMOTE...................................................................................................2 x RJ 45 parallel
SERVICE.................................................................................................................USB Typ B
Protection circuits
Mains inrush current limiter............................................................1.5 A RMS at 230 V
........................................................................................................3 A RMS at 115/100 V
Speaker switch on delay..................................................................................Approx. 2 s
Self-resettin overvolta e protection...................................................Up to 400 VAC
Self-resettin overtemperature protection...........................................75 °C / 176 °F
Output short circuit protection......................................................................±40 A peak
Output DC protection.....................................................................................max. ±10 V
Data (linear setting with subsonic filter)
Rated output power (THD+N 0.1 %)................................................................................
........................................................2 x 350 W into 8 ohms, both channels are driven
........................................................2 x 600 W into 4 ohms, both channels are driven
Frequency response (–3 dB)..................................................................28 Hz to 30 kHz
THD+N (20 Hz – 20 kHz).....................................................................................< 0.1 %
IM (SMPTE)................................................................................................................< 0.1 %
S / N ratio (unwei hted, RMS, analo input)................................................>105 dBr
S / N ratio (unwei hted, RMS, di ital input)..................................................>110 dBr
Dampin factor (20 Hz – 1 kHz / 4 ohms)..............................................................>90
Crosstalk (20 Hz – 20 kHz)..............................................................................< – 65 dBr
Digital Signal Processing
Samplin rate..........................................................96 kHz / 27 Bit ADC / 24 Bit DAC
Basic delay analo input incl. conversion (AD/DA)............................................0.3 ms
ADC Dynamic........................................................................................................> 110 dB
Input Dynamic........................................................................................................> 127 dB
DAC Dynamic........................................................................................................> 110 dB
Power consumption (typical values)
Standby.............................................................................................................................4 W
ON, without si nal.......................................................................................................48 W
ON, Standard si nal* at 4 Ohms (2 x 75 W)...................................................215 W
..........................................................*Standard si nal: Pink noise, 1/8 nominal power
Power supply
Switch mode power supply...................................................................................................
.........................................................................with active power factor correction (PFC)
Mains connector....................................................................................PowerCon® (blue)
Operatin ran e (min./nom./max.)................................85/115/130 V, 50 / 60 Hz
low ran e
..............................................................................................170/230/266 V, 50 / 60 Hz
hi h ran e
Mains fuse............................................................................2 x 8 A Time la (T), internal
5 x 20 mm, hi h breakin capacity
D6 Amplifier, Hardware manual (1.2EN) Page 17 of 20

Operating conditions
Temperature ran e*...................................................0° C to 40° C / 32° F to 104° F
.............................................*sum of avera e output power of 2 x 200 W (400 W)
................................................................................into 4 ohms for continuous operation
Temperature ran e**.................................................0° C to 45° C / 32° F to 113° F
..........................................................**reduced output power or short term operation
Humidity (rel.), avera e..........................................................................................< 80 %
Dimensions, weight
Hei ht x width x depth.................................................................2 RU x 19" x 351 mm
.................................................................................................................2 RU x 19" x 13.8"
Wei ht.............................................................................................................8 k / 17.6 lb
6.1. Dimensions
Fig. 7: Dimensions in mm [inch]
D6 Amplifier, Hardware manual (1.2EN) Page 18 of 20

7. Manufacturers declarations
7.1. EU declaration of conformity (CE symbol)
This declaration applies to the D6 amplifier manufactured by d&b
audiotechnik AG consistin of the amplifier unit.
d&b D6 Amplifier, Z2700
All products of type D6 startin from variant Z2700.000 are included,
provided they correspond to the ori inal technical version and have not
been subject to any later desi n or electromechanical modifications.
We herewith declare that said products are in conformity with the
provisions of the followin EC directives includin all applicable
amendments.
A detailed declaration is available on request and can be ordered from
d&b or downloaded from the d&b website at www.dbaudio.com.
7.2. WEEE declaration (Disposal)
Electrical and electronic equipment must be disposed of separately from
normal waste at the end of its operational lifetime.
Please dispose of this product accordin to the respective national
re ulations or contractual a reements. If there are any further questions
concernin the disposal of this product please contact d&b audiotechnik.
D6 Amplifier, Hardware manual (1.2EN) Page 19 of 20

D2017.EN.01, 11/2007 © d&b audiotechnik AG
d&b audiotechnik AG, Eugen-Adolff-Str. 134, D-71522 Backnang, Germany, Phone [phone], Fax [phone]_______