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d&b Audiotechnik D20 Amplifier 4ch NL4

The 2 RU four 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 signal delay capability enables user definable settings of up to 10 s (= 3440 m/11286 ft), 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.

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 V - 240 V, 50 - 60 Hz 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 RJ 45 connectors enable access to the d&b Remote network through OCA/AES70 via Ethernet and through CAN-Bus respectively.



 POWER  Mains power switch
 SCROLL/EDIT  Digital rotary encoder
 Display  Colour TFT touchscreen, 3.5"/320 x 240 pixel
 ISP, GR, OVL A/B  Colour TFT
 Equalizer  2 x 16-band PEQ/notch/shelving/asymmetric
 Latency analog and digital inputs  0.3 msec.
 Delay setting  0.3 - 10000 msec.
 Configurations  current d&b loudspeakers (except J-Series and M2 monitor) 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
 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®
 Maximum output power per channel (THD+N < 0.5%, all channels driven)  
 CF = 6 dB at 4 / 8 ohms  4 x 1000/800 W
 CF = 12 dB at 4 / 8 ohms  4 x 1600/800 W
S/N ratio (unweighted, RMS)  
Analog input > 104 dBr
Digital input > 106 dBr
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