McIntosh "Mac-Kit" 30 Monoblock - Rare One Year Production!

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Here we have a very rare McIntosh Mac-Kit 30 monoblock tube amp.

This was the one year only (!), '60-'61 kit version of the legendary MC30. Same specs, etc.

The production numbers on these were very low (I've read under 200), and they rarely come up for sale. Many of these didn't sell as kits, but were actually factory built and then sold.

This monobock received a professional ground up restoration including the replacement of all critical components, and stainless chassis.

To commission a restoration of this level would cost thousands of dollars alone in labor and parts.

Perfect for a mono project - or as a pair if you have a second one.

We also have a standard MC30 currently listed on our store for an excellent pairing.

Our Testing Process for Amplifiers (Tube) 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 tubes are inspected for signs of stress overheating or cracking.

We then power up the unit carefully and run a simple 1k sine wave while monitoring the output on an oscilloscope for signs of distortion or noise. Finally we run the amplifier to its full rated power into the appropriate resistive load provided by our Sencore amplifier tester. If there is an issue, it will usually be noticeable at this point. If it all looks clean we will often test for THD (Total Harmonic Distortion) measured by our Keithley distortion meter, and compare it against the original manufacturers specifications. The amplifier the remains powered on to "burn in" on our test bench for a few hours to make sure there are no heat related issues. If there are balanced inputs available they will also be tested.

We also test all tubes for output gain and leakage on our calibrated B&K 747 tester against the original manufacturers specifications. If needed, the tubes will be replaced from our vast NOS (New Old Stock) vintage or modern inventory.

Final testing involves pushing actual music thorough the amplifier. We've learned over time that some issues are only noticeable to a trained ear while listening to familiar source material. Our test bench has reference vintage Kef speakers that we're very familiar with which quickly reveal any discrepancies. Some amplifiers will then move into our listening room where they are tested with our in-house reference speakers of choice.

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