D&B Audiotechnik D20 Four Channel Amplifier

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.

The D20 Touring rack assembly

The D20 Touring rack assembly is designed as a fully equipped and prewired system rack, providing mains power distribution, connector interfaces and all internal cabling for three D20 amplifiers[1]. It is equipped with a 32 A CEE mains power connector, a mains distribution device with a 32 A mains link, and a loudspeaker connector panel.

All internal audio and remote connections are fully prewired. A loom comprising two AES3 cables and one CAT5/etherCON[2] is supplied, providing patch cabling for a network connection and four AES3 channels. The D20 Touring rack assembly is provided with either a DS10 Audio network bridge, which comes supplied with all necessary cabling, or a 1 RU drawer.

The DS10 Audio network bridge interfaces between Dante networks and AES3 digital audio signals, while also providing distribution of Ethernet control data. The DS10 can deliver up to sixteen Dante network channels via AES3 digital signal outputs, and is intended to integrate directly into a D20 Touring rack assembly. The front panel of the DS10 is designed to align with the input panel of the D20 Touring rack assembly. The DS10 can be powered by one of the auxiliary mains outputs. All necessary patch cabling and links are supplied with a D20 Touring rack assembly including a DS10.

The 10 RU Touring rack houses a 19" internal shockmount steel frame accommodating three D20 amplifiers and the requisite connection panels. It comes with two sliding doors, a perspex window at the front, four wheels, six handles and recessed stacking moulds at the top.

The DS10 Rack upgrade kit contains everything required to replace the drawer within the D20 Touring rack assembly with a DS10. This kit includes a DS10 Audio network bridge, a powerCON[2] to powerCON[2] mains cable, an Ethernet patch cable and two AES3 XLR patch cables.

Technical Data

• Digital Signal Processing
• Equalizer
• 2 x 16-band PEQ/notch/shelving/asymmetric
• Latency analog and digital inputs
• 0.3 ms
• Delay setting
• 0.3 - 10000 ms
• 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
• ISP, GR, OVL A/B
• Colour TFT
• Connectors
• 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 AES3
• 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®
• 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
• 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
• 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
• 10.8 kg/23.8 lb

[1] The Touring rack assembly does not come with D20 amplifiers.

[2] etherCON® and powerCON® are registered trademarks of Neutrik AG, Liechtenstein.