McCormack Power Drive DNA-1 Amplifier


This is the very first McCormack DNA-1 to come into our shop. It's quite a nice pieces with very impressive design and engineering.

Hailing from the mid 1990's.

150W per channel makes it a very capable performer, able to drive most speakers with authority and grace.

Cosmetic condition is close to perfect with no significant signs of wear.

We performed a light service where it was re-biased and thoroughly tested in our lab.

In our long term listening test it performed flawlessly and we can see why these have such a loyal following.

Best of all it comes in its original box, but we'll also provide extra packing as needed for safe transit.

The original manual completes the set.

From a 1995 Stereophile review written by Robert Harley:

The best word to describe the McCormack Power Drive DNA-1 is "musical." It consistently offers an involving, satisfying musical experience. Apart from the specific performance attributes detailed in the body of the review, listening to music through the DNA-1 was just plain enjoyable. This is one solid-state amplifier I could be happy with for a long time. Further, the DNA-1 represents an extraordinary value; this combination of musicality and sheer output-power muscle are unprecedented at the price, in my experience."

Rated power output:
150 WPC RMS into 8 ohms (21.8dBW)
300 WPC RMS into 4 ohms (21.8dBW)
500 WPC RMS into 2 ohms (21.0dBW)
(bandwidth and distortion not specified)

Output current:
50A peak per channel

Input impedance:
100k ohms

Input sensitivity:

Frequency Response:
-3dB at 0.5Hz and 250kHz

Rise time:

Slew rate:

S/N ratio:
88dB, "A" weighted

Damping factor:
>100 (1kHz, 8 ohm load)

Output impedance:
±0.1 ohm

DC offset:

Signal polarity:

19" W by 7" H by 15" D

Shipping weight:
53 lbs.

The SkyFi Testing Process for Solid State Amplifiers:
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.

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 everything reads 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 then 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 be also be tested.

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.



Original Box





Not Applicable


Yes - Power

Physical Condition


Working Condition


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