McIntosh C28 // Vintage / Solid-State Preamplifier (26X09)

The McIntosh C28 is one of the quintessential solid-state preamps of the 1970s—smooth, warm, and unmistakably Mac from the first twist of a knob. Known for its rich midrange, effortless musical flow, and that classic glass-and-aluminum swagger, the C28 remains a favorite for anyone who wants vintage charm without sacrificing everyday usability. This unit has been fully serviced, giving it fresh life where it counts, and features brand-new front glass, restoring that iconic McIntosh glow to showroom beauty.

Musical, reliable, and visually stunning, this C28 is everything people love about vintage McIntosh—now tuned up, refreshed, and ready for decades more listening pleasure.

S/N: 26X09

RESTORATIONS

• Replaced the 4 power supply electrolytic caps
• Cleaned and verified all pots and switches
• Changed out all bad lights
• Repainted top chassis cover
• New OEM top cover decal
• New OEM top and bottom front bezels
• New OEM glass faceplate

FACTORY SPECS

Type   Solid-state stereo preamplifier

Frequency response   20Hz to 20kHz

Total harmonic distortion   0.1%

Gain   62dB (MM), 20dB (line)

Input sensitivity   2.5mV (mic), 2mV (MM), 250mV (line)

Signal to noise ratio   78dB (MM), 90dB (line)

Output   250mV (line), 2.5V (Pre out)

Semiconductors   26 x transistors, 4 x diodes, 2 x bridge rectifiers

Fits Cabinet   L12, L11, L52, L62

Dimensions   16"W x 5.43"H x 15"D

Weight   25 lbs.

LINER NOTES

The McIntosh C28 is a high quality stereo pre-amplifier. Each channel of the C28 consists of four parts, a low level amplifier, high level amplifier, active filters and headphone amplifier. Common regulated power supplies furnish power to both channels.