Top Audio Video 2011

Hardly prolific, but Copland always comes up with something of note when they can be bothered. The CTA506 (UK price is 4498 to give you an idea) is based on the KT120 power tube, which is turning out to be the valve du jour. It’s a new variant of the 6550/KT88 power tube, able to deliver approximately 30% more power than a KT88. A pair of KT120 tubes in push-pull configuration should be good for nearly 200 watts; here, Copland extracts a conservative 90Wpc. The CTA506 push-pull output stages uses of a pair of matched KT120s in fixed ultralinear configuration, with active tube regulation courtesy of two 6550s. The CTA506 is terrific-looking, too, in a handsome chassis fitted with a grooved front panel.

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