Vintage AmplifierCollectors archive

Marantz 7 Preamplifier with RCA Tubes

Marantz First posted September 2012

Archived listing from the original vintage-amplifier.com. Prices, seller details and purchase links have been removed; this page is a reference record, and nothing here is for sale. About this archive.

Marantz 7c Preamplifier
Marantz 7c Preamplifier
From the original site

Vintage Marantz 7 Serial # 7-20181. Excellent….Excellent ….Conditions.

All Original….See pictures. All 12AX7 is RCA …Great Britain.

Added in 2026

About this model

A Model 7, serial 7-20181, described as all original with RCA 12AX7 tubes made in Great Britain. The original post's title calls it a 7C; the listing itself simply says Marantz 7, and we have not found a reliable explanation of the C suffix. A later serial than the 7-17912 unit in the archive, it would date from a few years later in the production run, which began in 1958.

At a glance
MakerMarantz, New York, USA
ModelModel 7 stereo preamplifier
Serial7-20181 (listing)
Tubes12AX7, RCA made in Great Britain (listing)

Questions collectors ask

What do Marantz 7 serial numbers tell you?

They indicate roughly where a unit falls in the production run, which started in 1958 and lasted more than twelve years.

What tubes does a Marantz 7 use?

Six 12AX7s. This example had RCA tubes made in Great Britain.

Sources: Sound & Vision: Is This the Holy Grail of Classic American Hi-Fi?.

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