Positioned at the very heart of d&b's system approach, the D12 and D6 amplifiers both use Digital Signal Processing (DSP) to provide loudspeaker configurations and sophisticated protection circuits. They have user definable 4-band equalizers, a digital delay capability of up to 340 msec and 220 msec respectively and a signal generator offering pink noise or sine wave program for test and alignment purposes. Both amplifiers utilize switch mode power supplies with overvoltage protection. The D12 has both analog and AES/EBU digital signal inputs, and the digital elements of the amplifier are specified and constructed to achieve audio performance meeting, or exceeding, that of analog devices.

D12 amplifier

The D12 amplifier is a two channel power amplifier developed and manufactured by d&b utilizing Digital Signal Processing (DSP) to incorporate loudspeaker specific configuration information and functions. It is designed for use with d&b loudspeakers, has both digital and analog signal inputs as well as link outputs, remote control and monitoring capabilities and a switch mode power supply. The level control incorporates a digital rotary encoder enabling selection of all operating modes in conjunction with a Liquid Crystal Display (LCD). User definable equalization and delay functions are incorporated in each channel of the D12 and can be used for applications, such as front fills, or under balcony delays, without the need for external processors. The 4-band parametric equalizer provides optional Boost/Cut or Notch filtering and the signal delay capability allows delay settings of up to 340 msec. (= 100 m/328 ft) to be applied independently to either channel. A signal generator offering pink noise or sine wave program is also incorporated for test and alignment purposes. Each unit can be given a unique Device Name to simplify identification and a password protected LOCK function is also incorporated to inhibit unauthorized set up changes.

The D6 amplifier is a two channel power amplifier and controller unit. It is designed for use with the d&b fullrange loudspeakers (passive systems) and subwoofer systems.

A linear mode is available allowing the D6 to be used as a linear power amplifier.

Block Diagram (click to enlarge)

The D6 Amplifier incorporates:

• universal voltage, switch mode power supply with active power factor correction (PFC)
• two channel Class D power amplifier
• digital signal processors (DSP)
• comprehensive protection circuits
• controls and indicators
• analog and digital signal inputs and link outputs
• REMOTE and SERVICE interface

The level control on the front panel incorporates a digital rotary encoder, which enables selection of all operating modes in conjunction with a Liquid Crystal Display (LCD).

User definable equalization and delay functions are incorporated in each channel of the D6. The 4-band parametric equalizer provides optional Boost/Cut or Notch filtering and the signal delay capability allows delay settings of up to 340 msec. (= 100 m / 328 ft) to be applied independently to either channel. A signal generator offering pink noise or sine wave program is also incorporated for test and alignment purposes. Each unit can be given a unique Device Name to simplify identification and a password protected LOCK function is also incorporated to inhibit unauthorized set up changes.

The D6 is housed in a 19" × 353mm (13.9") 2 rack unit enclosure made from steel.

Controls and Indicators

Connections