Marantz Model 7C (1960–1966)

A tube stereo preamplifier from Marantz's golden era, designed and built in the USA.

Overview

The Marantz Model 7C is a vacuum tube stereo preamplifier built from 1960 to 1966. It was designed and manufactured in the USA. It has a big tube complement and a design that has lasted, and it is widely regarded as a classic of tube audio. It was reissued later in modified forms, including a 1996 replica, but the original 7C is still the one collectors go after.

Specifications

Rated Output / Maximum Output (1 kHz) Pre out	2V/15V
Frequency characteristic (FM, AM, FM Multiplex, TV, Aux, Tape-play)	20 Hz ~ 40 kHz ± 1 db
RIAA deviation	20 Hz to 20 kHz ± 1 dB
Input Sensitivity / Impedance Microphone	1.4mV/1M Ω
Input Sensitivity / Impedance Phono1, 2	1.2mV/47k Ω
Input Sensitivity / Impedance Tape-Head	2.5mV/1M Ω
Input Sensitivity / Impedance (FM / AM, FM Multiplex, TV, Aux, Tape-play)	140mV/330k Ω
Maximum Allowable Input (1 kHz) Microphone	140mV
Maximum Allowable Input (1 kHz) Phono1, 2	140 mV
Maximum Allowable Input (1 kHz) Tape-Head	300mV
Power supply voltage	100 VAC, 50Hz/60Hz
Power consumption	35W
External dimensions	Width 391 x Height 155 x Depth 261 mm
Weight	5.0kg

Design

The Marantz Model 7C uses vacuum tube technology and has a strong tube complement. The provided sources don't document the circuit topology or component layout of the original 7C. The design is recognized for its influence on later high-fidelity preamplifiers.

Context

The Model 7C belonged to Marantz's 1960s product line, grouped under "Legendary Products" with the Model 8 amplifier, the 2270 and 2325 receivers, and the Model 9 monoblocks. Solid-state variants like the Model 7T succeeded it, but the 7C remains the most celebrated tube version. Its design influenced future audio engineers and products, including the Luxman CL-38U.

Market

Original Marantz Model 7C units are highly collectible, and prices have reached astronomical levels. Restoration projects are documented, and service manuals are available.

eBay Listings

Marantz MODEL 7C vintage audio equipment - eBay listing photo 1

Vintage Marantz Model 7C Stereo Vacuum Tube Preamp Preampli

$4,600

See all Marantz MODEL 7C on eBay

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