Copland CTA407

CoplandSKU: 00506242238

Color: Black
Price:
Sale price€5.865,00 Regular price€6.900,00

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Description

Copland has always maintained that the amplifier is the interface between the signal sources and the loudspeaker system; any information that is lost or misinterpreted in this position is lost forever and, conversely, any additional information that is introduced is amplified. Amplifiers are considered everyday appliances and while some are of standard quality and construction, others successfully deviate from the conventional, they remind us of the pursuit of perfection, a human virtue we like to recognize and approach.

the Copland tube amp with the right mix of minimalism and electronics

Copland CTA407 tube amplifier

The aesthetics of most Copland amps are one of no-nonsense luxury. However, with the CTA407 tube amplifier the design simplicity has been compromised with the addition of a fair amount of electronics to support the audio stages of the amplifier.

The forty LED diodes on the front panel (10 for each tube), display the bias system and diagnostics of the tubes used in the CTA407. For those who do not wish to see them always on, it is possible to deactivate them.

One of the advantages of the CTA407 amplifier is the automatic regulation for whichever tube, of the 6550/KT88/KT120/KT150 family, is used in the final stage. The self-bias adjustment system of the CTA407 is not only lossless, but is an integrated part of the internal high-pass filtering, which perfectly matches the transfer function of the amplifier and greatly improves its overall quality.

discover the features and power of the Copland CTA407 tube amplifier

Evolution of the Copland CTA405 amplifier

The Copland CTA407 features five line inputs, including a monitor tape loop, and an MM phono input, capable of accommodating high output moving coil and moving coil cartridges. It is an evolution of the Copland CTA405 amplifier, the object of desire of audiophiles around the world since its launch more than a decade ago. The push-pull output stages consist of a pair of power valves per channel, in a fixed ultra-linear configuration, which feature the low distortion of the triodes and the generous power of the tetrodes. Normally a pair of 6550 or KT family valves in push-pull configuration can deliver a power of over 100W. Moderating the power output, the CTA407 delivers 2x50W in class A/AB high bias mode. In practice, this means that the amplifier delivers most of its power in class A. Thanks to the excellent quality of the output transformers used, almost perfect linearity is achieved before the use of feedback, reducing internal compensation networks of the delay and ensuring high stability after the negative feedback closing loop at 18 dB.

The power and dynamics of the Copland CTA407 tube amplifier

CTA407 reproduces music extraordinarily accurately, without ever mentioning listening fatigue, with strong dynamics and a wide flexibility in the choice of speakers. The low noise from the amplifier itself is a joy, especially for owners of highly efficient speaker systems.

CTA407 employs a motorized volume control and can be controlled in its main functions by the Copland RC102A remote control.

TECHNICAL SPECIFICATIONS :

Power 50W + 50W RMS at 4/8 ohms
THD < 0.5% at all levels
Frequency response 10Hz - 100kHz (-1dB)
Preamplifier valves 2x 12BH7, 1x ECC83
Final valves 4x 6550/KT88
Self-bias Yes, for 6550/KT88/KT90/KT100/KT120/KT150
Operating class A/AB
Entrances 5 line inputs, tape loop, phono MM
Remote control Yes, including RC102A
Final valves diagnostic LED indication Yes, 40 front LEDs for bias
Output transformer Linear 5Hz - 100kHz
Motorized volume control Yes
Negative feedback 18dB
Push-pull output stages 2x power tubes per channel, ultra-linear fixed configuration
Loop tape monitor Yes

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