Oxmoor 4x4 Buffer Amplifier #1

The Model 4x4 is a compact, four-channel audio buffer/mixer/distribution amplifier. Any of four inputs can be assigned to any (or all) of the four outputs. Internal jumpers are used to configure the unit, thus affording complete flexibility with security from unauthorized tampering.

While it is an exceptional distribution amplifier, with four independently adjustable gain stages, the 4x4 does more than distribute audio. Its mixing capability enables it to combine up to four inputs to drive a single output. Two independent mixing buses enable signals to be mixed before or after the gain stages. The 4x4 can be used as a zone mixer or a line driver. It is ideal for matching different signal levels to perform such common conversion tasks as interfacing hi-fi equipment with professional audio systems. The 4x4 can accomplish this while also providing both a stereo output and a mono sum.

Front panel gain trimmers provide ±15 dB of gain adjustment that may be assigned to the inputs or outputs. RF suppression circuitry safeguards against radio-frequency interference. Input and output stages are electronically balanced and fitted with standard 3-pin, XLR-type connectors.

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