McIntosh C11 (1961–1963)

A vacuum tube stereophonic preamplifier from McIntosh, produced during the early stereo era.

Overview

The McIntosh C11 is a stereophonic preamplifier made by McIntosh from 1961 to 1963. It is all tube, and the company's official name for it is "Stereophonic Pre-amplifier." Detailed technical documentation is scarce. The C11 is recognized as part of McIntosh's early stereo lineup. One owner reports running a C11 with an MC240 amplifier for casual listening and calls it a satisfying vintage setup.

Specifications

Response	20-20kHz (+0.5 -0.5dB)
Distortion	0.2%
Noise and hum	-85dB high level

Design

The C11 is a vacuum tube preamplifier, built entirely with tube circuitry. It was designed after the McIntosh C22 (1963 edition), which suggests a shared design lineage within McIntosh's early stereo control centers.

Market

A recently serviced unit was listed for sale in October 2025, so these are still usable and maintainable. One owner reported a slight hum, a known issue that may be correctable. One listing shows an asking price of $5,590. Another auction received 31 bids, with a current bid of $1,666. Owner's manuals are available separately for $74.95.