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d&b E-Series 2928 d&b E-Series

The D6, D12 and D80 amplifiers

Two decades have passed since d&b embarked on integrating

Digital Signal Processing (DSP) into power amplifiers. It is over

ten years since all d&b amplifiers used this technology and

included analog and digital signal inputs, extensive loudspeaker

control, configuration and protection functions, user definable

equalization, delay and the all embracing remote control

functionality as standard.

The d&b amplifiers sit right at the very heart of the d&b systems,

providing sophisticated control capabilities as well as the power

to efficiently drive d&b loudspeakers in whatever the particular

application. The amplifiers are developed and manufactured by

d&b and incorporate loudspeaker specific setups. Sophisticated

protection circuits modelling thermal and mechanical driver

behaviour are provided, resulting in the sustained reliability of

d&b systems. Switchable functions for precisely tailoring system

response in a wide variety of applications are also included,

integrating complete loudspeaker system management into the

amplifier. The digital elements are specified and constructed to

achieve outstanding audio performance while maintaining a very

low latency of 0.3 msec The amplifiers are designed specifically

for use with d&b loudspeakers, have remote control, monitoring

capabilities and switch mode power supplies. To simplify

configuration, the output mode of the amplifier can be configured

as Dual Channel, Mix TOP/SUB or 2-Way Active modes

depending on the application. The user definable equalization

and delay functions incorporated in each channel of all d&b

amplifiers are intended for tuning in applications such as infills,

frontfills or under balcony delays, without the need for external

processors. A signal generator offering pink noise or a sine

wave program is also incorporated for test and alignment

purposes.

d&b amplifiers

contain functions to allow system status

monitoring and protection features, increasing the longevity of

d&b systems. They provide the d&b System check function, which

is designed to verify the system performs within a predefined

condition; this can be used to report the system condition after a

show. Input monitoring can detect incoming pilot tones to verify

the integrity of the signal path to the amplifier, while the Load

monitoring function determines the status of the loudspeaker

impedance. Both d&b System check and Load monitoring can

determine the status of an LF or HF driver in systems with multiple

elements, even if these are crossed over passively. Automatic and

continuous impedance monitoring, along with Input monitoring

are designed for incorporation in applications specified to the

requirements of International Standard IEC 60849 ‘Sound

Systems for Emergency Purposes’.

d&b amplifiers feature two control interfaces. Firstly, the front

panel rotary encoder, combined with the display, provides full

access to settings and functions. Secondly, by utilizing the d&b

Remote network, the amplifiers can be remotely controlled and

monitored from a virtual centre. Every amplifier channel can be

assigned a unique channel and device name to simplify

identification. The Wink function, which can be enabled remotely,

flashes the display backlight to clearly identify specific amplifiers

in a system. An integrated password protected LOCK function

prevents unauthorized changes.

A powerCON

mains connector socket is fitted on the rear

panel. The switch mode power supply of each amplifier

incorporates mains overvoltage protection, inrush current limiting

and loudspeaker protection at start up. Temperature and signal

controlled fans cool the internal assemblies. d&b amplifiers

offer analog and digital AES/EBU signal inputs, with link

outputs for each channel. The AES/EBU link output carries a

refreshed signal, while a power fail relay is incorporated to

prevent interruption of the signal chain, in the event of a power

failure.

The D12 amplifier incorporates d&b SenseDrive for accurate

control of LF drivers in d&b loudspeakers driven 2-Way Active or

in actively driven d&b subwoofers. When the D12 is fitted with

EP5 connectors and appropriate 5-wire cabling, d&b SenseDrive

can be used resulting in an extremely precise bass performance

even at high levels. The LoadMatch function integrated within the

D80 amplifier enables the electrical compensation of

loudspeaker cable properties, without the need for an extra

conductor. This results in an increased accuracy of audio

reproduction over a bandwidth of up to 20 kHz preserving the

tonal balance when cable lengths of up to 70 m (230 ft) are

used.

Firmware updates containing new loudspeaker configurations or

additional functions can be loaded to the amplifiers via the d&b

Remote network.

At the time of print, certain functions required within applications specified to achieve

compliance with IEC 60849 such as Input and Load monitoring are not implemented in

the D80 amplifier, please contact your distributor for further information

powerCON

is a registered trademark of the Neutrik AG, Liechtenstein

D6 D12 D80

User interface Encoder/LC display Encoder/LC display Encoder/colour TFT touchscreen

Output channels 2 2 4

Input channels 2 AES or analog 2 AES or analog 4 AES or analog

Latency 0.3 msec 0.3 msec 0.3 msec

User equalizers (per channel) 4-band 4-band 2 x 16-band

Delay 340 msec/116.9 m 340 msec/116.9 m 10 sec/3440 m

Rated output power

2 x 300 W into 8 ohms

2 x 600 W into 4 ohms

(THD+N < 0.1%)

2 x 750 W into 8 ohms

2 x 1200 W into 4 ohms

(THD+N < 0.1%)

4 x 2000 W into 8 ohms

4 x 4000 W into 4 ohms

(THD+N < 0.5%, 12 dB crest factor)

Output routing

Dual Channel

w/o B1 and B2

Dual Channel, Mix TOP/SUB

2-Way Active

Dual Channel, Mix TOP/SUB

2-Way Active

Output connectors NL4 NL4/EP5/NL8 NL4/EP5 plus central NL8

Cable compensation No SenseDrive LoadMatch

Mains voltage

Wide range switch mode

power supply

100/200V or 120/230V

Wide range switch mode

power supply

Weight (kg/lb) 8/17.6 13/28.7 19/42

Dimensions 2 RU x 19” x 353 mm 3 RU x 19" x 353 mm 2 RU x 19" x 530 mm

Remote CAN CAN OCA via Ethernet/CAN

Airflow

Comparison of the D6, D12 and D80 amplifiers

1 2 ... 10 11 12 13 14 15 16 17 18 19 20 21

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