Copland CTA408

The Copland CTA408 Integrated Amplifier is intended for those who  prefer the ease of a single chassis amplification, still wanting the  performance of separates. It offers such amenities as separate MC and MM  phono inputs, Monitoring in/outputs, Headphone amplifier and a startup  procedure that vastly prolongs the tube life.

During the last decades, advances in technology has offered new  possibilities for circuit optimization, using components and technology  mainly unavailable for the previous designers of tube amplifiers.

Inside the CTA408 is one of the most carefully conceived tube amplification engines available.

• Driver stage tubes supported by MOSFET circuitry.

• Numerous individual power supplies, designed to operate with  constant power, thereby isolating power stage fluctuations from entering  the input stages and eliminating reverse modulation towards the AC  supply grid.

• Dedicated Class A headphone amplifier, (speaker output mutes on headphone insertion)

• Excellent J-FET- Phono-amplifier. Active RIAA equalization employing  more than one hundred discrete components inside a noise-shielding box  of its own.

• The output transformers are Copland in-house design, fine-tuned for  optimal power bandwidth. The massive core size of the transformers  prevents core saturation, and they are able to transfer full power well  below 20Hz to the loudspeakers with a minimum of phase shift. Multiple  layers of interleaving wires ensures a superb linearity. The extended  high frequency performance reduces the requirements for internal lag  compensation after the amplifiers 15dB negative feedback loop is closed.

• The amplifier power plant is based on the KT150 power valves. These  valves are the latest variant of the legendary 6550/KT88 power valves  and in the CTA408, they surely demonstrate that the everlasting sound  qualities of tubes can be extended into regions nowadays dominated by  solid stage designs.