McIntosh C28 Preamp - Complete Collectors Set

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Absolutely gorgeous C28 from the best era of McIntosh, part of our Holy Grail collection.

This is a complete single owner set including the original box with packaging, owner's manual, and wood case.

A perfect set for a collector or enthusiast and priced accordingly. Working and looking perfect all around.

Repair Notes:
• Full power supply recap performed in-house with SkyFi branded replacement capacitors as shown in our listing photos.
• Phono trim pots bypassed.

Please see the owner's manual link below for full technical specifications:

Click here for a PDF copy of the original McIntosh C28 Sales Brochure

Click here for a PDF copy of the original McIntosh C28 Owners Manual

Our Testing Process for Preamplifiers at SkyFi:

We start with a visual inspection of all internal components to make sure there are no signs of stress or aging. Capacitors are checked for telltale sings of bulging or leaking, resistors are checked for signs of overheating or cracking, and transistors are checked for signs of stress or damage. Special attention is paid to the power supply which is the most common source of failure for preamps. We then power up the unit and run a simple 1k sine wave while monitoring the low voltage output on an oscilloscope for signs of distortion or noise to get a baseline.

At this point we will lubricate and clean all switches and potentiometers (that are not sealed) with a high quality contact cleaner, and then re-test all functions for any signs of noise or scratching.

Final testing involves putting actual music through the preamplifier We have learned over time that some issues are only noticeable to a trained ear while listening to a familiar source material. Our test bench has reference vintage Kef speakers that we are super familiar with which will quickly reveal any discrepancies. Some preamps will then move into the listening room where they will be tested with our in-house reference system.

Please click here for detailed specifics regarding our specialized packing process that separates us from the rest.