d & b audiotechnik D40 Installation and operation manual

- preliminary -
DD40
Start-up manual
1.1 en

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General information
D40 Start-up manual - preliminary -
Version: 1.1 en, 07/2021, D2037.EN .01
Copyright © 2021 by d&b audiotechnik GmbH & Co. KG; all
rights reserved.
Keep this document with the product or in a safe place
so that it is available for future reference.
We recommend you to regularly check the d&b website for the
latest version of this document.
When reselling this product, hand over this document to the new
owner.
If you supply d&b products, please draw the attention of your
customers to this document. Enclose the relevant documents with
the systems. If you require additional documents for this purpose,
you can order them from d&b.
d&b audiotechnik GmbH & Co. KG
Eugen-Adolff-Str. 134, D-71522 Backnang, Germany
T [phone], F [phone]
[email protected], www.dbaudio.com

IMPORTANT SAFETY INSTRUCTIONS
Explanation of graphical symbols
The lightning symbol within a triangle is intended to alert
the user to the presence of uninsulated "dangerous
voltages" within the unit’s chassis that may be of
sufficient magnitude to constitute a risk of electric shock
to humans.
The exclamation point within a triangle is intended to
alert the user to the presence of important operating and
service instructions in the literature accompanying the
product.
Before using this product, carefully read the
applicable items of the following safety instructions.
1. Keep these instructions for future reference.
2. Read these instructions.
3. Heed all warnings.
4. Follow all instructions.
5. WARNING! To reduce the risk of fire or electric shock:
– Do not expose this unit to rain or moisture.
– Keep water or other liquids away from the unit.
– Do not place liquid filled containers, for example
beverages, on top of the unit.
– Do not operate the unit while it is wet or standing in liquid.
6. Always operate the unit with the chassis ground wire
connected to the electrical safety earth.
Do not defeat the safety purpose of a grounding-type plug. A
grounding-type plug has two blades and a third grounding
prong. The third prong is provided for your safety.
If the provided plug does not fit into your outlet, consult an
electrician for replacement of the obsolete outlet.
7. Do not use this unit if the power cord is damaged or frayed.
Protect the power cord from being walked upon or pinched,
particularly at the plugs and the point where it exits from the
apparatus.
8. The unit is intended for use in a 19" rack. Follow the mounting
instructions. When a rack on wheels is used, exercise caution
when moving the loaded rack to avoid injury from tipping
over.
9. Unplug this apparatus during lightning storms or when unused
for long periods of time.
10. Never connect an output pin to any other amplifier input or
output pin or to the earth (ground). This may damage the unit
or lead to electric shock.
11. Lay all cables connected to the unit carefully so that they
cannot be crushed by vehicles or other equipment and that no
one can either step on them or trip over them.
12. Refer all servicing to qualified service personnel. Servicing is
required when the apparatus has been damaged in any way
such as:
– Power-supply cord or plug is damaged.
– Liquid has been spilled into the unit.
– An object has fallen into the unit.
– The unit has been exposed to rain or moisture.
– The unit does not operate normally.
– The unit was dropped or the chassis is damaged.
– Do not remove top or bottom covers. Removal of the covers
will expose hazardous voltages. There are no user
serviceable parts inside and removal may void the warranty.
13. Use the mains plug as the disconnecting device and keep it
readily accessible. If the mains plug is not readily accessible
due to mounting in a 19" equipment cabinet, then the mains
plug for the entire rack must be readily accessible.
14. An experienced user must always supervise the equipment,
especially if inexperienced adults or minors are using the
equipment.
IMPORTANT SAFETY INSTRUCTIONS
d&b D40 Start-up manual 1.1 en-EN - preliminary - 3

Contents
1 Intended use.......................................................................... 5
1.1 About this manual....................................................................... 5
1.2 Loudspeaker types...................................................................... 5
2 Scope of supply.................................................................... 6
3 Technical specifications...................................................... 7
3.1 Current/power draw and thermal dissipation.......................... 9
4 Overview.............................................................................. 11
4.1 Connections.............................................................................. 11
4.2 Controls and indicators - User interface.................................. 11
5 Startup................................................................................... 12
5.1 Rack mounting and cooling..................................................... 12
5.2 Connections.............................................................................. 13
5.2.1 Mains connection................................................................. 13
5.2.2 Audio input and output connectors..................................... 14
5.2.3 SPEAKER OUTPUTS.............................................................. 15
5.2.4 Network connections (PRI/SEC).......................................... 16
5.3 Controls and indicators............................................................ 17
5.3.1 Mains power switch.............................................................. 17
5.3.2 TFT color touchscreen - User interface................................. 17
5.3.2.1 Operating concept............................................................ 18
5.3.2.2 Standby mode................................................................... 20
5.3.2.3 Mute functions................................................................... 21
6 Basic settings - Quick reference................................... 22
7 Service/Maintenance and care................................... 24
7.1 Service...................................................................................... 24
7.2 Maintenance and care............................................................ 24
7.2.1 Touchscreen cleaning........................................................... 24
7.2.2 Touchscreen calibration........................................................ 25
8 Manufacturer's declarations......................................... 26
8.1 Declaration of Conformity....................................................... 26
8.2 WEEE Declaration (Disposal).................................................. 26
8.3 Licenses and Copyright............................................................ 26
Contents
d&b D40 Start-up manual 1.1 en-EN- preliminary -4

Intended use
The d&b D40 amplifier is designed for mobile applications and
intended to be used with applicable d&b loudspeakers. A LINEAR
setup is available allowing the amplifier to be used as a linear
power amplifier.
NOTICE!
The device complies with the electromagnetic compatibility
requirements of EN 55032:2019 (product family standard for
audio, video, audio-visual and entertainment lighting control
apparatus for professional use) for the environment Class B
(residential).
Acoustic interference and malfunctions may occur if the unit is
operated in the immediate vicinity of high-frequency transmitters
(e.g. wireless microphones, mobile phones, etc.). Damage to the
device is unlikely, but cannot be excluded.
1.1 About this manual
With respect to the vast functionality and high complexity of the
device, this manual covers the basic safety instructions as well as
the vital technical specifications and instructions for startup.
A full version of this manual (Þ Reference manual) with
comprehensive information is available for download on the
related product page of the d&b website at www.dbaudio.com.
1.2 Loudspeaker types
The maximum number of cabinets driven by each channel varies
depending on their nominal impedance. It can be found in the
respective loudspeaker manual and also in the data section of
each loudspeaker product page on the d&b website at
www.dbaudio.com.
The minimum recommended impedance per channel is 4 ohms.
Nom. impedance Cabinets per channel
4 Ω 1
8 Ω 2
12 Ω 3
16 Ω 4
20 Ω 5
A list of d&b loudspeakers supported by the amplifier is included in
the Release notes of the amplifier firmware. The latest version can
be found on the d&b website at www.dbaudio.com.
1 Intended use
d&b D40 Start-up manual 1.1 en-EN - preliminary - 5

Scope of supply
Before starting up the device, please verify the shipment for
completeness and proper condition of the items.
If there is any sign of obvious damage to the unit and/or the
power cord, do not operate the unit and contact your local dealer
from whom you received it.
Pos. Qty. d&b Code Description
[1] 1 Z2850 d&b D40 Amplifier
Including:
[1.1*] 1 Z2612.xxx Power cord (specific to country*)
[2] 1 D2037.EN .01 d&b D40 Start-up manual.
Z2612.000
3-pin Schuko
CEE 7/7
Z2612.010
3-pin UK
BS 1363A
Z2612.025
3-pin U.S.
NEMA L6-20P
Z2612.035
3-pin Japan
NEMA L6-20P
Z2612.040
3-pin South Korea
KS C8305
Z2612.050
3-pin Australia
AS 3112
Z2612.060
3-pin China
GB 2099
Z2612.070
3-pin Switzerland
SEV 1011
Z2612.090
3-pin Denmark
Afsnit 107-2-D1
Z2612.100
3-pin South Africa
SANS 164-1
Z2612.110
3-pin Argentina
IRAM 2073
Z2612.120
3-pin Brazil
NBR 14136
Z2612.130
3-pin India
IS 1293
*Mains plug types and associated standards
(Similar illustrations, not in scale)
2 Scope of supply
d&b D40 Start-up manual 1.1 en-EN- preliminary -6

Technical specifications
Operating conditions
Operating temperature (*continuous/**short-term)
–10 °C ... +40*/+50** °C (+14 °F ... +104*/+122** °F)
Storage temperature –20 °C ... +70 °C (–4 °F ... +158 °F)
Humidity (rel.), non-condensating 70%
Power supply
Switched mode power supply with automatic mains range selection and
active Power Factor Correction (PFC).
Mains connector powerCON® TRUE1 TOP
Rated mains voltage (High range) 208 - 240 V, 50 - 60 Hz
Rated mains current (High range) 13 A
Rated mains voltage (Low range) 100 - 127 V, 50 - 60 Hz
Rated mains current (Low range) 20 A
Power consumption (typical values)
Standby 12 W
Idling 130 W
Peak output 2800 W
Audio power outputs
SPEAKER OUTPUTS A/B/C/D 4 x NL4
4 CHANNEL OUTPUT 1 x NL8
Output power @ 23 °C (73.4 °F) – 230 V AC / 50 Hz into 8/4 ohms:
EIA-426B Noise CF 12 dB 4x 2000 W / 2400 W
EIA-426B Noise CF 9 dB 4x 2000 W / 1300 W
EIA-426B Noise CF 6 dB 4x 950 W / 750 W
Burst 1 kHz
20 ms full, 480 ms –20 dB 4x 1150 W / 1200 W
Long burst 1 kHz
200 ms full, 600 ms –20 dB 4x 750 W / 700 W
Sinus 1 kHz, short term–all channels
4x 2000 W, 4 ms / 2400 W, 5 ms
Sinus 1 kHz, short term–single channel
1x 2000 W, 2 s / 2400 W, 110 ms
Sinus 1 kHz, long term, +40 °C (+104 °F) into 4 ohms 4x 250 W
Maximum output voltage/current 180 Vpeak / 35 Apeak
Frequency response (–1 dB, Linear mode) 35 Hz – 25 kHz
Gain (Linear mode @ 0 dB) 31 dB
Output noise / Dynamic range
Output noise (BW 20 kHz) / dynamic range (BW 20 kHz, reference
180 Vpk)
Analog input 350 µVRMS / 111 dB
Analog input, A-weighting 250 µVRMS / 114 dB
Digital input 200 µVRMS / 116 dB
Digital input, A-weighting 150 µVRMS / 119 dB
THD+N / Crosstalk
THD+N (unweighted, 20 – 20 kHz)
4x 250 W / 8 ohms < –86 dB/0.005 %
4x 250 W / 4 ohms < –83 dB/0.007 %
Crosstalk (20 – 20 kHz) < –70 dBr
4x 250 W into 8/4 ohms
Protection circuits
Mains and power supply: Overvoltage and undervoltage,
inrush current limiter, internal fuse.
Output: Overcurrent, DC offset, HF voltage limiter, pop-noise
suppression.
Cooling: Temperature-dependent fan, self-resetting
overtemperature protection.
Analog inputs and outputs
Analog inputs (INPUT / A1 - A4) 3 pin XLR female
Pin assignment 1 = GND, 2 = pos., 3 = neg.
Input impedance 32 kOhms, electronically balanced
CMRR @ 100 Hz/1 kHz / 10 kHz >80 / >80 / >70 dB
Maximum input level (balanced/unbalanced) +25 / +18 dBu
+26.4 dBu @ 0 dBFS
Analog outputs (LINK / A1 - A4) 3 pin XLR male
Pin assignment 1 = GND, 2 = pos., 3 = neg.
parallel to input
Digital inputs and outputs
Digital inputs (IN - D1/2, D3/4) 3 pin XLR female, AES3
Pin assignment 1 = GND, 2 = AES Signal, 3 = AES Signal
Input impedance 110 ohms, transformer balanced
Sampling frequency 44.1 | 48 | 96 | 192 kHz
Word length 16 - 24 bit
Digital outputs (OUT - D1/2, D3/4) 3 pin XLR male
electronically balanced
Output modes Mains on: analog signal buffering (refresh)
Mains off/power fail: bypass relay
Network (PRI/SEC)
Connector type 2 x RJ 45 (etherCON®)
PRI Remote control via R1 (OCA/AES70)
Star topology
SEC Currently disabled
Digital Signal Processing
System start-up time < 21 sec.
Conversion 96 kHz
Latency analog input 0.3 msec.
Latency digital input (AES) 0.3 msec.
Equalizer two user definable 16-band equalizers
Filter types: PEQ/Notch/HiShlv/LoShlv/Asym
Delay 0.3 msec. - 10 sec.
Frequency generator Pink noise or Sine wave 10 Hz – 20 kHz
Controls and indicators
POWER Mains power switch
SCROLL/EDIT Digital rotary encoder
TFT color touchscreen 4.3" / 480 x 272 pixels
3 Technical specifications
d&b D40 Start-up manual 1.1 en-EN - preliminary - 7

Technical specifications
Fan noise emission
Rack mounted, measured on axis, 1 m (3.3 ft) to front panel, A-weighting.
Min. RPM 30 dB(A)
Max. RPM 50 dB(A)
Ambient temperature 23 °C / 73.4 °F
Dimensions and weight
Height x width x depth 2 RU x 19" x 465 mm (18.3")
Weight 13.8 kg / 30.4 lb
D40 enclosure dimensions in mm [inch]
d&b D40 Start-up manual 1.1 en-EN- preliminary -8

Technical specifications
3.1 Current/power draw and thermal dissipation
Measurement references
For all noise signals, the values are measured at the maximum level
just before any amplifier limiter activity (no Gain Reduction).
Noise CF 12 dB: Noise signal according to EIA-426-B with a
crest factor of 12 dB.
This represents the use case of live music or less compressed
recorded music.
Noise CF 9 dB: Noise signal according to EIA-426-B with a crest
factor of 9 dB.
This represents the use case of music with medium compression.
Noise CF 6 dB: Noise signal according to EIA-426-B with a crest
factor of 6 dB.
This represents the use case of heavily compressed music.
Sinus (100 ms): 1 kHz sine wave signal, 0 dBFS input level and
a duration of 1 s.
The RMS current value is calculated over a 100 ms time window.
This window is stepped in increments of 10 ms over the recording.
The resulting value is the highest current within a window of
100 ms.
230 V AC / 50 Hz / 0.5 Ω Source impedance - all channels driven
State Load
[ohms]
Mains
current
[A RMS]
Power
factor
Input
power
[W]
Output
power
[W]
Power
loss
[W]
BTU/hr kCal/hr
Standby - 0.27 0.17 10.7 - 10.7 37 9
Standby Wake on Audio - 0.30 0.25 17.0 - 17.0 58 15
Idling - 0.77 0.72 129 - 129 440 111
Noise CF 12 dB 8 ohms
4 ohms
6.1
7.6
0.95
0.96
1333
1663
1025
1214
308
449
1051
1533
265
386
Noise CF 9 dB 8 ohms
4 ohms
11.8
8.1
0.98
0.97
2618
1791
2085
1311
533
480
1820
1636
459
412
Noise CF 6 dB 8 ohms
4 ohms
10.2
8.8
0.98
0.98
2272
1960
1790
1436
482
524
1644
1790
414
451
Sinus max. 1 s 8 ohms
4 ohms
15.6
15.5
-
-
-
-
-
-
-
-
-
-
-
-
208 V AC / 60 Hz / 0.5 Ω Source impedance - all channels driven
State Load
[ohms]
Mains
current
[A RMS]
Power
factor
Input
power
[W]
Output
power
[W]
Power
loss
[W]
BTU/hr kCal/hr
Standby - 0.30 0.19 11.6 - 11.6 40 10
Standby Wake on Audio - 0.32 0.25 16.5 - 16.5 56 14
Idling - 0.85 0.72 127 - 127 433 109
Noise CF 12 dB 8 ohms
4 ohms
6.8
8.6
0.96
0.96
1347
1700
1029
1221
318
479
1085
1633
273
412
Noise CF 9 dB 8 ohms
4 ohms
13.3
9.2
0.98
0.97
2656
1827
2072
1321
584
506
1994
1726
503
435
Noise CF 6 dB 8 ohms
4 ohms
11.6
9.9
0.99
0.98
2320
1990
1802
1438
518
552
1770
1883
446
475
Sinus max. 1 s 8 ohms
4 ohms
17.5
17.5
-
-
-
-
-
-
-
-
-
-
-
-
d&b D40 Start-up manual 1.1 en-EN - preliminary - 9

Technical specifications
120 V AC / 60 Hz / 0.2 Ω Source impedance - all channels driven
State Load
[ohms]
Mains
current
[A RMS]
Power
factor
Input
power
[W]
Output
power
[W]
Power
loss
[W]
BTU/hr kCal/hr
Standby - 0.22 0.37 9.8 - 9.8 33 8
Standby Wake on Audio - 0.29 0.46 16.2 - 16.2 55 14
Idling - 1.29 0.84 130 - 130 444 112
Noise CF 12 dB 8 ohms
4 ohms
12.2
11.5
0.96
0.96
1378
1304
1023
893
355
411
1211
1402
305
353
Noise CF 9 dB 8 ohms
4 ohms
13.4
12.9
0.97
0.97
1535
1483
1150
1025
385
458
1315
1564
332
394
Noise CF 6 dB 8 ohms
4 ohms
14.6
14.3
0.98
0.98
1675
1643
1250
1143
425
500
1450
1705
366
430
Sinus max. 1 s 8 ohms
4 ohms
22.2
23.0
-
-
-
-
-
-
-
-
-
-
-
-
100 V AC / 60 Hz / 0.2 Ω Source impedance - all channels driven
State Load
[ohms]
Mains
current
[A RMS]
Power
factor
Input
power
[W]
Output
power
[W]
Power
loss
[W]
BTU/hr kCal/hr
Standby - 0.22 0.44 9.6 - 9.6 33 8
Standby Wake on Audio - 0.31 0.52 16.0 - 16.0 55 14
Idling - 1.46 0.88 128 - 128 437 110
Noise CF 12 dB 8 ohms
4 ohms
15.1
14.4
0.97
0.97
1367
1360
1031
904
336
456
1367
1556
344
392
Noise CF 9 dB 8 ohms
4 ohms
16.6
16.0
0.98
0.98
1581
1521
1140
1014
441
507
1505
1730
379
436
Noise CF 6 dB 8 Ohm 4
Ohm
18.2
17.8
0.99
0.99
1738
1707
1246
1138
492
569
1675
1941
422
489
Sinus max. 1 s 8 Ohm 4
Ohm
28.2
27.9
-
-
-
-
-
-
-
-
-
-
-
-
d&b D40 Start-up manual 1.1 en-EN- preliminary -10

Overview
4.1 Connections
[1] Mains connector socket.
Refer to Þ Chapter 5.2.1 "Mains
connection" on page 13.
[3] Output connector panel.
Refer to Þ Chapter 5.2.3 "SPEAKER
OUTPUTS" on page 15.
[2] Audio INPUT (analog/digital) and
LINK connectors.
Refer to Þ Chapter 5.2.2 "Audio
input and output connectors"
on page 14.
[4] Network (PRI/SEC).
Refer to Þ Chapter 5.2.4 "Network
connections (PRI/SEC)" on page 16.
4.2 Controls and indicators - User interface
[6] TFT color touchscreen
4.3" / 480 x 272 pixels.
[7] Rotary encoder SCROLL/EDIT.
Refer to Þ Chapter 5.3 "Controls and
indicators" on page 17
and .Þ Chapter 5.3.2 "TFT color
touchscreen - User interface"
on page 17
[5] Mains power switch.
Refer to Þ Chapter 5.3 "Controls and
indicators" on page 17, following
Þ Chapter 5.3.1 "Mains power
switch" on page 17.
4 Overview
d&b D40 Start-up manual 1.1 en-EN - preliminary - 11

Startup
5.1 Rack mounting and cooling
Rack mounting
The enclosure is designed to fit standard 19" equipment racks or
cabinets.
NOTICE!
When mounting applicable d&b devices into 19" equipment racks
or cabinets, it is strongly recommend that you:
▪Always fix the device at its front AND rear-mounted
rack ears using appropriate rack mounting screws and U
washers, as shown in the graphic opposite.
▪ Alternatively use shelves fixed to the inner sides of the
equipment rack or cabinet.
Cooling
Thermal conditions are a vital factor to ensure operational safety of
the power amplifiers. The amplifiers are equipped with two internal
fans that draw cool air from the front into the housing and channel
the warm air towards the back of the device.
▪ Please ensure that adequate cool airflow is provided.
▪ Do not block or cover the front panel air intake or the vents on
the rear panel.
▪ If the amplifiers are installed in sealed cabinets (e.g. in fixed
installations), use additional fan modules with filters that can be
easily replaced without opening the sealed cabinets.
▪ Do not combine the amplifiers with D6 or D12 amplifiers in one
rack.
▪ Do not rack up the amplifiers together with other devices
producing additional heat with opposing airflow.
5 Startup
d&b D40 Start-up manual 1.1 en-EN- preliminary -12

Startup
5.2 Connections
5.2.1 Mains connection
WARNING!
Potential risk of electric shock or fire.
The device is a protective class 1 unit. A missing earth (ground)
contact may cause dangerous voltages in the housing and controls
and may lead to electric shock.
▪ Connect the device to mains power supplies with protective
earth only.
▪ If there is any sign of obvious damage to the power cord
and/or mains plug, do not use the power cord and replace it
before further use.
▪ Please ensure the mains connector is accessible at any time to
disconnect the device in case of malfunction or danger.
If the mains plug is not readily accessible due to mounting in a
19" rack, then the mains plug for the entire rack must be readily
accessible.
▪ Do not connect or disconnect the mains plug under load.
Before connecting the device to mains voltage, check that the
mains voltage and frequency correspond to the specifications on
the rating label next to the mains connector socket on the rear
panel of the unit.
Mains voltage range:
100 to 240 V AC, ~50/60 Hz, 1800 W.
A powerCON® TRUE1 TOP mains connector socket [1] is fitted on
the rear panel and an appropriate power cord [1.1] is supplied.
d&b D40 Start-up manual 1.1 en-EN - preliminary - 13

Startup
5.2.2 Audio input and output connectors
The rear panel features eight audio input connectors with the
following assignments:
▪ four analog inputs (A1 - A4) with corresponding link outputs.
▪ two digital AES3 inputs (D1/2 and D3/4 - four channels) with
corresponding outputs.
Each input channel can be routed to any of the output channels A
to D Þ Input routing.
Analog INPUT and LINK (A1 - A4)
A 3-pin female XLR input connector is provided for each channel.
Wired in parallel is a 3-pin male XLR input link connector used to
feed the input signal onto the next device in the signal chain.
Specifications
Pin assignment 1 = GND, 2 = pos., 3 = neg.
Input impedance 32 kOhms, electronically balanced
CMRR @ 100 Hz/1 kHz / 10 kHz >80 / >80 / >70 dB
Maximum input level (balanced/unbalanced) +25 / +18 dBu
+26.4 dBu @ 0 dBFS
LINK (A1 - A4) 3 pin XLR male
parallel to input
Digital input and output (IN/OUT - D1/2 - D3/4)
Two 3-pin female XLR digital input (IN) connectors (D1/2 and
D3/4) are provided, each accepting a 2-channel AES (AES3)
digital audio signal.
The corresponding 3-pin XLR male digital output (OUT) can be
used to feed a refreshed input signal to the next device in the
signal chain. The signal shape (the rising and falling edges of the
signal) and level are refreshed using a latency free analog buffer
amplifier.
A power fail relay is incorporated to prevent interruption of the
signal chain should there be a power failure. In this situation, the
digital input signal bypasses the analog buffer amplifier and is
routed directly to the output (OUT).
Specifications
Pin assignment 1 = GND, 2 = AES Signal, 3 = AES Signal
Input impedance 110 ohms, transformer balanced
Sampling frequency 44.1 | 48 | 96 | 192 kHz
Word length 16 - 24 bit
OUT (D1/2 - D3/4) 3-pin XLR male
electronically balanced
analog signal buffering (refresh)
Power Fail Relay (Bypass)
d&b D40 Start-up manual 1.1 en-EN- preliminary -14

Startup
5.2.3 SPEAKER OUTPUTS
WARNING!
Potential risk of electric shock.
The amplifier output pins can carry dangerous voltages.
▪ Only use isolated loudspeaker cables with correctly fitted
connectors.
▪ Never connect an amplifier output pin to any other input or
output connector pin or protective earth (ground).
The amplifier is supplied with four NL4 output connectors
(A/B/C/D) one for each amplifier output channel Þ Dual
Channel configuration.
In addition, two NL4 connectors are provided, one for each pair of
amplifier output channels to allow either Mix TOP/SUB (A/B MIX,
C/D MIX) or 2-Way Active (2-WAY/2-Way) configurations.
All NL4 connector pins are hardwired and permanently driven
using the following pin assignments:
SPEAKER OUTPUTS pin assignments
AMP SPEAKER OUTPUTS
A B A/B C D C/D
A1+/1–
2+/2–
1+/1–
B 1+/1–
2+/2– 2+/2–
C 1+/1–
2+/2–
1+/1–
D 1+/1–
2+/2– 2+/2–
Output modes and connector assigments - exemplary
Dual Channel - Dual Channel
A/B - C/D
Mix TOP/SUB - Mix TOP/SUB
A/B MIX - C/D MIX
or...
2-Way Active - 2-Way Active
2-WAY - 2-WAY
Dual Channel - Mix TOP/SUB
A/B - C/D MIX
or...
Dual Channel - 2-Way Active
A/B - 2-WAY
Note: A detailed description of the applicable output modes is given in the D40 Reference manual which can be downloaded from the
related product page at www.dbaudio.com.
For further information regarding the applicable output modes for each loudspeaker system, please refer to the relevant loudspeaker manual.
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Startup
4 CHANNEL OUTPUT
NOTICE!
The 4 CHANNEL OUTPUT connector is only intended as an
interface to a rack panel or to loudspeaker multicores and
breakout adapters.
Do not connect any loudspeaker cabinet, neither passive nor active
systems, to this connector, otherwise there is a risk of damaging the
loudspeaker components or the amplifier.
The centered NL8 connector carries the output signals of all four
amplifier channels with the following pin assignment:
1+/— = Channel A pos. / neg. 2+/— = Channel B pos. / neg.
3+/— = Channel C pos. / neg. 4+/— = Channel D pos. / neg.
5.2.4 Network connections (PRI/SEC)
The device allows standard remote control via the d&b Remote
network using the d&b R1 Remote control software or the
integrated Web remote interface.
For this purpose, use the upper RJ45 (PRI) connector socket
(1 Gbit/100 Mbit – peer-to-peer) requiring star topology network
wiring. Daisy-chaining is not supported.
Note: The bottom RJ45 connector socket (SEC) is not enabled
but is reserved for future feature implementations.
LED indicators
The two LED indicators above the respective connector in use
indicate the following states:
Green Illuminates permanently when the device is connected
to an active network and flashes as long as a data
stream is transmitted.
Yellow ▪ Is off when the speed is 100 Mbit.
▪ Illuminates permanently when the speed is 1 Gbit.
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Startup
5.3 Controls and indicators
5.3.1 Mains power switch
The on/off rotary switch [5] is located on the bottom right of the
front panel.
OFF Mains isolation is not provided. The internal power
supplies are off but remain connected to the mains.
ON The unit is switched on and ready for operation.
5.3.2 TFT color touchscreen - User interface
NOTICE!
The touch panel utilizes a thin flexible sheet that may be damaged
by sharp objects or heavy treatment.
The user interface consists of a 4.3" TFT color touchscreen [6] with
a resolution of 480 x 272 pixels and an additional digital rotary
encoder [7].
The resistive touchscreen responds to pressure and therefore can
be operated by a fingertip, even when wearing gloves or by an
appropriate stylus tip (pen).
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Startup
5.3.2.1 Operating concept
Home screen
From the Home screen, the menu structure of the operating
software is divided into two main axes, the «Device» setup and the
«Channel» setup.
The navigation buttons allow for direct vertical access to the
specific submenus while the tab structure on the right side of each
submenu provides a clear horizontal order.
In addition, the Home screen gives direct access to the Network
subscreen.
The Home screen can be accessed from any screen or menu at
any level using the Home button ( ).
Home screen access chart
Hierarchy
level
A detailed description of the «Device» and «Channel» setup menu structure and screen contents is given in the D40 Reference manual, which can be downloaded from the
related product page at www.dbaudio.com.
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Startup
Cursor conventions
The graphical user interface features two types of cursors, the
«Position» and the «Edit» cursors.
Position
cursor
The Position cursor marks the selected menu item by
a white frame. Depending on the type of screen
item, the Position cursor allows you to either activate
a function, navigate through the menu or enter Edit
mode Þ Edit cursor.
Edit
cursor
In Edit mode, the Edit cursor is marked by a yellow
frame. Turning the encoder to the right (clockwise)
increases the current value, turning the encoder to
the left (counterclockwise) decreases it.
To leave Edit mode press the encoder or simply
select the respective menu item again. The color of
the frame will change from yellow back to white
again Þ Position cursor.
Interaction
The operating concept allows different methods of interaction and
configuration.
Touchscreen in combination with the rotary encoder
This method may preferably be used to set values of input fields
such as Gain settings, CPL, Delay or EQ settings.
▪ Select menus, menu items and/or function elements by selecting
the relevant item.
▪ Enter/edit values by turning the encoder.
▪ Confirm entered/changed values by selecting the respective
item again or the confirmation button («OK») or pushing the
encoder.
Rotary encoder only
This method is mainly intended for users who are familiar with the
user interfaces of other d&b amplifiers.
▪ Select menus, menu items and/or function elements by turning
the encoder to move the Position cursor to the relevant item.
▪ Access the selected item or function element by pushing the
encoder.
▪ Enter/edit values by turning the encoder.
▪ Confirm entered/changed values or leave Edit mode by
pushing the encoder.
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Startup
5.3.2.2 Standby mode
To switch the device to Standby mode, proceed as follows:
1. Select the «Power» button on the top right of the home screen.
↳A dialog appears allowing you to either select the Back
button ( - Cancel), «Mute all» or «Standby».
2. Select «Standby».
↳When the device is in Standby mode, both the «Power»
button on the right and the green Power on indicator on the
left are switched off. In addition, on the «Device view»
button, Standby flashes alternating with the Device name.
In Standby mode, the user interface of the device is still
operable.
The operating state (Standby mode) is stored when the
«Power» button is set to 'Off' and is restored when the
«Power» button is set back to 'On' again.
In Standby mode, the main power supply and the power
amplifiers are switched off to save energy. The display and
controls remain active to allow repowering of the device by
remote control or by selecting the «Power» button on the
Home screen.
3. To repower the device, select the «Power» button again.
Notes on Standby
When the device is set to Standby (or the mains power is
switched off), the movement of the loudspeaker cones in the
connected cabinets 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 "bass
trap".
To permanently mute single subwoofer cabinets while others
are operated at the same time it is therefore preferable to use
the Mute function instead of Standby. However, the Standby
mode can be useful with mid/high systems as it removes any
residual noise from the system.
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