The CTA405 is an integrated valve amplifier with five line-level inputs, including a tape monitor loop, and a built in RIAA phono circuit accommodating moving magnet and high output moving coil cartridges.

A complete line stage similar to the one found in the Copland CTA305 preamplifier is installed separately together with a dedicated power supply, providing a low output impedance buffer between the amplifier interconnect cables and the level control prior to the power amplifier.

The push pull output stages consist of a pair of matched 6550 power valves in fixed ultra-linear configuration, delivering the low distortion of triodes combined with the power of tetrode valves.

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