I am the second owner of these amplifiers and have owned them since 2012. These are older and were not designed for KT-150 tubes. The can use El-34, 6L6, KT-66, KT-77, 6550, KT-88, KT-90, KT-120, and KT-150 (but will not produce full power of 170 wpc with the KT-150).They will be supplied with a used and in good working condition tube set including Tesla EL -34 tubes purchased from Quicksilver, and a generic power cord. The chrome fronts are difficult too photograph and the flash makes it appear that there are scuffs on the front edge. I can send additional photos if you are interested. Serial number 409 and 410. I have the original boxes, but would prefer a local sale. From the Quicksilver Audio web site: Powerful, musical, and effortless–this is the sound of the Quicksilver Audio V4. As with all Quicksilver Audio amplifiers, the V4 Mono Amplifiers are all tube and hand wired point-to-point. A bias meter is mounted in the chassis and individual controls allow each output tube to be biased separately. Matched quads will work best but are not necessary. The low screen voltage on the output tubes (300 volts) makes them last for thousands of hours of “on” time. Specifications
Power Output 120 watts into 4 or 8 ohms from 20 Hz to 40 KHz
Power Bandwidth 22 Hz to 40 KHz
Peak Power 180 watts at 1 KHz
Input Sensitivity 1.5 volts
Input Impedance 100 Kohms
Tube Complement
1-12FQ7 input
1-12BH7 driver
4-EL-34 outputs
Finish Nickel chassis
Carbide black capacitor and transformer cover
Dimensions 7 7/8"H, 13 3/4"D, 16 3/4"W
Weight 51 lbs., 56 lbs. shipping weight Please see the review quotes below: "The V4 recreates a musical event on a scale and with a solidity, roundedness, and three-dimensionality matched by few and surpassed by no other amplifiers, with sensational dynamic-range to boot. " Paul Seydor, the absolute sound,October 2002. "Connecting the Quicksilver Audio V4s quickily revealed that these were very good sounding amps indeed. Space, delicacy, transparency, and overall musical believability were of high order." Bascom King, Audio, February 1998sound quality.
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