Marantz Model 7C (1960–1966)
A tube-powered stereo preamplifier from Marantz’s golden era, designed and built in the USA.
Overview
The Marantz Model 7C is a vacuum tube stereo preamplifier produced from 1960 to 1966. Designed and manufactured in the USA, it stands as one of Marantz’s most iconic audio components. Known for its robust tube complement and enduring design, the Model 7C was part of Marantz’s legendary 1960s lineup and is widely regarded as a classic in tube audio. It was later reissued in modified forms, including a 1996 replica, but the original 7C remains a sought-after collector’s item.
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 features a strong tube complement. While detailed circuit topology and component layout for the original 7C are not documented in the provided sources, the design is recognized for its influence on later high-fidelity preamplifiers.
Context
The Model 7C was part of Marantz’s iconic 1960s product line, grouped among "Legendary Products" with the Model 8 amplifier, 2270 and 2325 receivers, and Model 9 monoblocks. It was succeeded by solid-state variants like the Model 7T, 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, with prices reaching astronomical levels. Restoration projects are documented, and service manuals are available, indicating ongoing support and interest in maintaining these units.
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