D80 Architectural specifications

The amplifier shall be four channel incorporating digital signal processors (DSP) to provide loudspeaker specific configurations and functions and dedicated protection circuits. It shall be equipped with digital and analog signal inputs as well as link outputs, remote control and monitoring capabilities via CAN-Bus or Ethernet (OCA). User interface shall be via a TFT color touchscreen in conjunction with a digital rotary encoder and via remote.
Four input and input link connector shall be provided while two of the connectors shall be configurable for analog or digital (AES3) audio signals.
Analog inputs shall be electronically balanced with an input impedance of 38 kOhm while the analog link output is linked in parallel to the analog input connector.
The digital inputs shall be transformer balanced with an input impedance of 110 ohm while the digital link output shall be electronically balanced providing analog signal buffering (refresh) and power fail relay (Bypass). Sampling shall be 48 / 96 kHz / 2 Ch/n and Word-Sync: PLL-locked to source (slave mode) synchronization.
Signal processing shall utilize 96 kHz sampling rate with 27 Bit ADC / 24 Bit DAC conversion while the latency shall not exceed 0.3 msec.
The output connector options shall be 4 x NL4 or 4 x EP5. A four channel out connector (NL8) shall be provided for loudspeaker multicore purposes.
Output configurations shall be selectable for dual channel, mixed top/sub and 2-way active modes.
It shall incorporate two user definable 16-band equalizers for independent application to each channel allowing parametric filters, notch, hi- and lo- shelve filters as well as asymmetric filters.
A signal delay capability of up to 10 sec. (3440 m / 11286 ft) shall be incorporated for independent application to each channel.
Compensation for cable length shall be incorporated to improve impulse response.
It shall contain a signal generator offering pink noise or sine wave program.
Load monitoring and System check functions shall be included to ascertain the status of the loudspeaker impedance. Load monitoring shall allow impedance monitoring to determine the status of an LF or HF driver in systems with multiple elements, even if these are crossed over passively.
Input monitoring shall be included to allow detection of incoming pilot signals.
A Fallback function shall be available to enable the definition of primary (Regular) and secondary (Fallback) signal paths for analog and digital input signals with two different modes (Manual or Auto). It shall ensure that any secondary or emergency signal fed to the Fallback inputs is transmitted when required.
A Override function shall be available to allow a dedicated analog input to be set as a major signal path with highest priority for general messages or emergency services.
An AutoStandby function shall automatically switch the amplifier to Standby mode after a predefined time when the incoming signal level at the individually specified inputs drops below a defined threshold. The function shall be independent of the mute status of the respective channels. An AutoWakeup function shall automatically repower the amplifier, when an input signal is present and exceeds a defined threshold.
A switch mode power supply shall be incorporated and allow automatic mains range selection for use with 220 - 240 V AC and 100 - 120 V AC, 50 - 60 Hz mains power supply voltages. Mains voltage monitoring, mains inrush current limiter, self-resetting overtemperature, under- and overvoltage protection shall be incorporated as well as mains current limiting.
Power factor compensation (PFC) shall be incorporated to provide a clean and efficient sinusoidal current draw.
It shall have temperature and signal controlled fans for cooling the internal assemblies.
The power amplifier channels shall have ground fault protection, output pop-noise suppression, DC offset protection, output HF voltage limitation, output current limitation/protection and self-resetting overtemperature protection.
The output power shall be: 4 x 2600/2000 W into 4/8 ohms at a crest factor (CF) of 6 dB, 4 x 4000/2000 W into 4/8 ohms at a crest factor (CF) of 12 dB, all channels driven.
Damping factor (20 Hz - 200 Hz into 4 ohms) shall be >100 while the S/N ratio (unweighted, RMS) shall be >110 dBr (analog input) and >114 dBr (digital input).
The dimensions (H x W x D) shall not exceed 2RU x 19" x 530.5 mm (2RU x 19" x 20.9") and shall weigh no more than 19 kg (42 lb).

The amplifier shall be the D80 by:
d&b audiotechnik GmbH & Co. KG.