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Conrad Johnson MF2300 amplifier In very good conditionA highly prestigious piece of audiophile equipment.A few fins on the side rear were dented. They could be pulled out, likely rather easily.Other than that, minty.The Conrad-Johnson MF-2300 is a highly regarded, premium solid-state stereo power amplifier. Revered by audiophiles, it is designed to mimic the rich, musical liquidity of tube amplifiers while delivering the authoritative bass and control of a high-powered solid-state unit. Key FeaturesTube-Like Sound: Employs an output stage using four pairs of MOSFETs per channel to achieve a warm, silky-smooth midrange and high-end. Speaker Compatibility: Capable of driving difficult, low-impedance loads (like electrostatic or ribbon speakers) with ease, delivering up to one-third more power into lower impedances. [1, 2, 3]Premium Build: Built with premium internal components, including all-polystyrene capacitors in the audio circuit, machined gold-plated OFC input connectors, and robust binding posts. Later models added Vishay resistors at critical points to extend the open-loop frequency response. [1]Thermal Management: Features massive heatsinks that allow the output transistors to run cool, promoting long component lifespan.Technical SpecificationsPower Output: 240 Watts per channel into 8 ohms (can output nearly 400 Wpc into 4 ohms) both channels driven from 20 Hz to 20 kHz.Frequency Response: 20 Hz to 20 kHz (+0, -0.25 dB).Total Harmonic Distortion (THD): Less than 1%.Sensitivity: 2.0 V to rated power.Hum and Noise: 98 dB below full power output.Input Impedance: 100k ohms.Shipping to states in longitude of Colorado, farther west or rural parts of the Midwest will be a little more, billed separately
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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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