The McIntosh C24, while visually similar to the C22 was McIntosh's first solid-state preamp. This is also one of the most transparent preamps they made, and is also one of the most collectible. This example was built late-1964, has excellent glass, and has just been fully serviced.

RESTORATIONS

• Full 30-point service check
• Rebuilt can capacitor
• Replaced bias capacitor
• Cleaned controls, switches, and chassis

SPECS

Type   Solid-state stereo preamplifier

Response 20-20kHz (+0 -0.5dB)

Distortion 0.1%. Noise and hum -75dB aux, -60dB phono

Output rated 2.5v, 10v max

Input sensitivity and impedance aux 0.20V at 250k, phono 2mV at 47k. L+R out 2.5v with control (+6 -6 dB re main output)

Tone controls dual concentric bass and treble each +18 -18dB

Loudness flat to max. LF filter 50Hz at 12dB/octave

HF filter 5kHz at 12dB/octave

Phase switch left channel speaker line

Dimensions 16"w x 5.44"H x 11"D

Weight 17 lbs.