Danish-based amplifier maker Copland has just informed us of their new CTA408 Integrated Amplifier.
Copeland has aimed the CTA408 at those who prefer the ease of a single chassis amplification solution, and yet still demand the performance of separates.
The new model certainly looks to cover everything an integrated should, including separate MC and MM phono inputs, monitoring in/outputs, and a dedicated Class A headphone amplifier. Moreover, and perhaps more importantly, it also possesses a startup procedure that vastly prolongs the tube life.
Over the years we have seen advances in technology that offer new possibilities for circuit optimisation, using components and technology mainly unavailable for the previous designers of tube amplifiers.
We are told that inside the CTA408 is one of the most carefully conceived tube amplification engines available. This architecture features driver stage tubes supported by MOSFET circuitry and many individual power supplies that are designed to operate with constant power. This design isolates power stage fluctuations from entering the input stages and eliminating reverse modulation towards the AC supply grid.
The phono pre-amplifier is a J-FET model with active RIAA equalisation that utilises more than one hundred discrete components inside a noise-shielding box of its own.
The output transformers, naturally, are a 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. Additionally, multiple layers of interleaving wires ensure 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 plainly demonstrate that the everlasting sound qualities of tubes can be extended into regions nowadays dominated by solid stage designs.
The substantial power tubes are aesthetically pleasing, and so Copeland decided to make them visible behind lateral perforations on the front panel.
CTA408 TECH SPECS
- Output power: 2x75W into 3 ohms or 8 ohms load Nominal speaker impedance: 4 & 8 ohms
- Line input impedance: 50 K ohms
- Phono input impedance: 47 K ohms (MM) / 50, 100, 470 Ohms (MC) Line Inputs sensitivity: 250 mV
- Phono sensitivity: 3.0 mV (MM) / 0.26 mV (MC) Frequency response: 5 Hz – 100 kHz -3dB
- T.H.D: Better than 0.9 %
- Signal/noise IHF-A): Better than 90dB Phase: Non-Inverting
- Global Feedback: 15 dB
- Vacuum tubes: 4 pcs. KT150 2 pcs.12BH7
- 2 pcs. 6072A / 12AY7
- Power consumption: Max.400 W
- Dimensions: 435mm (w) x 220mm (H) x 460mm (D)
- Shipping weight: 26 Kg
HEADPHONE AMPLIFIER SECTION
- Output Impedance: 9 ohms
- Gain: 17.5 dB
- Frequency response: 10 Hz – 200 kHz / -3dB
UK price is £6,398 inc. VAT
Visit to Copland. for more info.