30D 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 Ethernet (OCA) or CAN-Bus. User interface shall be a Web Remote interface and via remote control software.
Four analog input connectors shall be provided also acting as link output.
Two digital input connectors shall be provided, each accepting a 2 channel digital (AES3) audio signal.
Analog inputs shall be electronically balanced with an input impedance of 38 kOhm.
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.
Connector type for all audio inputs and link outputs shall be 3-pin Phoenix Euroblock male (Phoenix MSTB 2,5 / 3-STZ).
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 connectors shall be 2 x Phoenix 4-pin Euroblock female (Phoenix IPC 5/4-STF-7,62).
Output configurations shall be selectable for dual channel, mixed top/sub and 2-way active modes.
Five GPIO lines shall be provided on an Phoenix 6-pin Euroblock male (Phoenix MSTB 2,5/6-STZ) as digital control lines which can be configured either as an input or output (In/Out) and shall allow either level (Hi/Lo active) or edge (rising/falling) triggering.
In addition a FAULT contact shall be provided on an 3-pin Phoenix Euroblock male (Phoenix MSTB 2,5/3-STZ) to allow a general device error to be remotely indicated.
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.
It shall contain a signal generator offering pink noise or sine wave program.
Compensation for cable length shall be incorporated to improve impulse response.
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 universal range switched mode power supply shall be incorporated and allow mains range of 100 to 240 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.
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 1000/800 W into 4/8 ohms at a crest factor (CF) of 6 dB, all channels driven.
Damping factor (20 Hz – 200 Hz into 4 ohms) shall be >80 while the S/N ratio (unweighted, RMS) shall be >104 dBr (analog input) and >106 dBr (digital input).

The dimensions (HxWxD) shall not exceed 2RU x 19" x 435 mm (2RU x 19" x 17.1") and shall weigh no more than 10.6 kg (23.4 lb).

The amplifier shall be the 30D by:
d&b audiotechnik GmbH & Co. KG.