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The Conrad-Johnson MV-75A is a vintage 75-watt-per-channel stereo vacuum tube power amplifier known for its rich tonal warmth and straightforward audio circuit design. SpecificationsPower output: 75 watts per channel into 8Ω (stereo), 150 watts into 8Ω (mono)Frequency response: 20Hz to 20kHzTotal harmonic distortion: 1%Signal to noise ratio: 90dBSpeaker load impedance: 4Ω to 16ΩValve complement: 4 x 6550, 2 x 6CG7, 1 x 5751Local pick up / inspection / purchase available at Archer High Fidelity in Falls Church, VA. We are a vintage sales and service specialist covering the Washington DC metro area.All major credit cards accepted, as well as PayPal, check on clearing, and Venmo.Any other questions, please feel free to ask.
Condition is unspecified, so the real value hinges on whether it’s been serviced and is operating cleanly, but at US$1,500 this sits below the US$1,194–US$4,011 typical spread and just under the US$2,106 median, so it reads as a solid buy rather than a stretch. For a Conrad-Johnson tube power amp, that’s a sensible entry point if the cosmetics and electronics are decent.
These MV-series amps are well liked for a big, airy, slightly romantic presentation with real drive, especially on efficient speakers or anything that benefits from tube texture without going soft. The upside here is straightforward: if it’s original, quiet, and not needing immediate restoration, you’re paying a fair-to-good price for a respected classic.
Independent perspective — not a price guarantee. Always verify condition, accessories and provenance before purchase.
Conrad-Johnson emerged in the mid-1970s from the dissatisfaction of two American economists and audiophiles, Dr. William Conrad and Dr. Lewis Johnson, with the inconsistent performance of contemporary amplifiers. Founded in the United States, the company launched its inaugural product, the all-vacuum-tube PV-1 preamplifier, in 1977, quickly earning critical acclaim and establishing a benchmark for musicality. This debut propelled Conrad-Johnson into the forefront of the tube renaissance, with the iconic MV75 power amplifier following in 1978, solidifying its heritage as a pioneer in high-end audio craftsmanship.
The brand specializes in vacuum-tube preamplifiers and power amplifiers, renowned for their warm, engaging sound that prioritizes musical satisfaction over sterile measurements. While tube designs remain its cornerstone, Conrad-Johnson expanded into solid-state amplifiers and phonostages in the 1980s, alongside limited ventures like the Sonographe turntable line and electronics acquired in the late 1980s. All components are hand-built in the USA using simple circuits and premium custom parts, reflecting over four decades of refined design philosophy.
Conrad-Johnson holds an exalted position in the high-end market as an American classic, beloved by audiophiles for gear that "just sounds right." Its products command lust among enthusiasts worldwide, blending vintage appeal with sustained relevance, and consistently rank among the most musically rewarding options available.
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