D20 Amplifier

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d&b audiotechnik

The 2RU, four (4) channel D20 amplifier is ideally suited to mobile and installation applications which require low to medium Sound Pressure Level (SPL) capabilities.  The D20 features the same Digital Signal Processing (DSP) platform as the latest generation of d&b amplifiers, containing configurations for all d&b loudspeakers except the J-Series and the M2 monitor, plus a linear mode.

The equal ratio of signal input to amplifier output channels increases application flexibility particularly for monitor, frontfill or effect channel use.  The LoadMatch function integrated within the D20 amplifier electrically compensates for the properties of loudspeaker cable used.

The D20 incorporates Class D amplifiers utilizing a power supply with active Power Factor Correction (PFC) suitable for mains voltages 100 - 240V, 50 - 60Hz and maintains a stable output when used with weak or unstable mains supplies.  An NL8 provides all outputs on a single connector for loudspeaker multicores.  Dual channel mode is driven through four individual NL4 connectors, while Mix TOP / SUB and 2-Way Active mode output configurations for applicable d&b loudspeakers are available via two central NL4 connectors.  etherCON and RJ45 connectors enable access to the d&b Remote network through OCA via Ethernet and through CAN-Bus respectively.

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Manufacturer d&b audiotechnik

The signal delay capability of the D20 enables user definable settings of up to 10s (= 3,440m / 11,286ft), which can be applied independently to each channel.  The same applies to the two 16-band equalizers, providing optional parametric, asymmetric, shelving or notch filtering.

The D20 incorporates a colour TFT touchscreen, offering quick access to the menu structure, while the rotary encoder can be used for fine adjustment.  The front panel and the integrated touchscreen are tilted up for easy operation when the amplifier is below eye level.

Digital Signal Processing
Equalizer 2 x 16-band
Latency analog and digital inputs 0.3 msec.
Delay setting 0.3 - 10000 msec.
Configurations current d&b loudspeakers (except SL-Series, J-Series, M2) and linear mode
Function switches d&b loudspeaker specific circuits
Frequency generator Pink noise or Sine wave
Sampling rate 96 kHz/27 Bit ADC/24 Bit DAC

Controls and indicators
Power Mains power switch
Scroll/Edit Digital rotary encoder
Display Colour TFT touchscreen, 3.5"/320 x 240 pixel
(h x v)
Colour TFT

INPUT ANALOG (A1 - A4) 3 pin XLR female
ANALOG LINK (A1 - A4) 3 pin XLR male
INPUT DIGITAL (D1/2, D3/4) 3 pin XLR female AES 3
DIGITAL LINK (Output) 3 pin XLR male
Sampling Digital AES/EBU 48 kHz/96 kHz
Speaker outputs A/B/C/D NL4
Mix TOP/SUB / 2-Way Active output A/B and C/D NL4
4 Channel output NL8
CAN 2 x RJ 45 parallel
ETHERNET 2 x etherCON®, 10/100 Mbit Ethernet
Mains connector powerCON®-HC

Data (linear setting with subsonic filter)
Maximum output power per channel
(THD+N < 0.5%, all channels driven)
CF = 6 dB at 4 / 8 ohms
CF = 12 dB at 4 / 8 ohms
4 x 1000/800 W
4 x 1600/800 W
S/N ratio (unweighted, RMS)
Analog input
Digital input
> 104dBr
> 106dBr

Power supply
Type Universal range switch mode power supply with active PFC
Rated mains voltage 100 - 240 V, 50 - 60 Hz

Dimensions / weight
Dimensions (H x W x D) 2 RU x 19" x 460 mm/18.1"
Weight 10.8kg