The Direct injection module shall provide the functions of transformer isolation, impedance matching and attenuation into a low impedance active balanced input. The module shall be able to accept a maximum input level of at least 30dBu provide switchable attenuation from 0 to 30dB and output the signal into a balanced 600 Ω load.

Input connectors shall include two quarter inch jack sockets and one 3-pin XLR socket, all linked. Input impedance shall be 1M Ω (jacks sockets), 20K Ω (XLR only).

The output shall be transformer balanced and isolated, with a source impedance of 150 Ωs, capable of driving a 10dBu signal into a 2k_ load. The output connector shall be a 3-pin XLR socket.

An earth lift switch shall be provided to disconnect input and output grounds when required.

The unit shall obtain power from a 48V phantom supply.

The unit shall achieve or exceed the following specifications:

Output noise -100dBu. 20Hz to 20kHz unweighted, with input terminated by 10k Ω resistor
Distortion (THD+N) < 0.01% @ 1 kHz, +4dBu
Frequency response +0.5/-1dB 20Hz to 20kHz
Power consumption <10mA

The Direct Injection Module shall be the Klark Teknik model DN100 and no alternative option is available.

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