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V20 Integrated

V20 Integrated Amp
 
The V20 is a completely new concept in valve amplifier design. Forget all other more conventional designs, the V20 is a totally ''clean sheet of paper'' design.
 
The output valves are the indirectly heated ECC83 twin triode type, 10 per channel, operated in a parallel push pull class ''A'' circuit featuring Enhanced Triode Mode, as used in both the EAR 859 Single-Ended Triode Amplifier, and the EAR 861 push-pull triode amplifier. This circuit provides superb linearity and very low distortion. In addition, the V20 uses Tim's highly developed Balanced Bridge Mode ultra-wide-bandwidth output transformer, and no overall feedback. 
 
The key design parameters were to extend frequency response at both ends of the spectrum, improve low level detail, and provide optimum loudspeaker coupling. All of these points have been successfully achieved in the V20, with superb reliability from the low priced triode output valves. (All valves in the V20 are true triode valves.) 
 
The circuit is not the only new thing with this amplifier, the case work is new and unique. Tim wanted a more natural, harmonious look to his new amplifier, something less aggressive than traditional designs with exposed industrial looking iron transformer cores, hard angles, and valves stuck up in the air. The fascia is rounded, in a kind of half moon shape, with left & right channel valves positioned on opposing sides of the amplifier. Finish is exemplary, with wood-capped valve covers, heavy chrome-on-brass fascia, and gold plated control knobs. 
 
The name V20 was inspired by Tim's passion for the motor car, and in particular, the famous V12 Jaguar engine. The original prototype had twelve output valves, and we at Yoshino could not resist calling it a V12 amplifier engine! Tim decided to uprate the project when the true potential of this new circuit became apparent, and it crystallised as the present V20 specification, with no less than twenty output valves. 
 
Comparisons to the best motor car engine in the world are very valid, for this amplifier is so very smooth & sophisticated. There is very little to give this amplifier away as a valve amplifier: openness, speed & authority are three good words to describe it. 
 
The amplifier offers 20 watts per channel, has 5 line inputs, and can be connected to any loudspeaker load from 4 to 16 ohms. It is perfectly stable into any load, and will offer years of reliable service. 
 
 
Specification
Weight - 22kg
Size - 42cm(W) x 44cm(D) x 13.5cm(H)
Power Consumption - 150 V/A
Input Impedance - 47kOhms
Input Sensitivity - 40OmV
Signal to Noise Ratio - 93dB (Less than 0.4mv
Output Damping Factor - 10
I.M.D. - less than 0.5%
Valve List - 6pc ECC83 (12AX7) 4 pc ECCS2 (12AU7)
Power Output - 20 watts per channel 20Hz to 20kHz
Power Bandwidth - 12Hk-80kHz -3dB (Half power)
 

 

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