McIntosh C33 Vintage Audio Preamplifier with Wood Cabinet

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Full featured analog vintage preamp from McIntosh, made nearby in Binghamton NY.

One of the best vintage preamps featuring a full built-in EQ to help get the most out of your vintage speakers.

Also has an internal 20W x 2 amplifier powerful enough to drive efficient bookshelf speakers, making it perfect for a small bedroom or office without the need for an additional amplifier.

The built-in loudness compensator is perfect for listening at low levels while still getting full dynamic range from your speakers.

There's also an outboard speaker relay module for switching speakers from the front controls of the amp. Rare option that is included with your purchase.

Super clean unit with no signs of corrosion or abuse. Great bright chrome-work, with nearly intact glass and lettering. Near perfect.

Tested, serviced, and working as it should.

Includes a really clean original walnut wood case with McIntosh Panloc hardware.

Please see our photos or the links below for full specifications.

McIntosh C33 Original Sales Brochure

McIntosh C33 Manual

The SkyFi Testing Process for Preamplifiers:

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.