This is my Nikko Alpha ONE amplifier from 1976.
I have found that I prefer low powered (under 50 wpc) to high power. I seem to connect with the music, and have a more intimate experience with what I am listening to. Especially three piece jazz trios, or solo instrument performances. Also true with voice, female voices are more realistically represented with low power amps, at least to my ears.
But, having owned some pretty powerful amplifiers from Phase Linear, Carver, McIntosh, Crown, Yamaha, Harman Kardon Citation, Sansui, Great American Sound, SUMO, ADCOM and Krell, the Nikko Alpha ONE is stand out gem.
This amp doesn’t have the aggressive nature of the Phase Linear 400, or the Power of a McIntosh MC2300, but it does have a stunning sound. Easily distinguishing itself from other amplifiers I’ve owned with similar power ratings. The excellent ADCOM GFA 555 for example, has the same power rating and plenty of muscle. What it doesn’t have is the finesse of the Nikko Alpha ONE. The Phase Linear 400 and the ADCOM GFA 555 along with the Crown xli1500 are all weight lifters to be sure. But the Nikko is like an a well toned athlete wearing a tight T-Shirt. Strength, muscle power but with reserve. It’s a silent thunder that is there when you need it.
Similar to my favorite amp of all time the SUMO Andromeda, the Nikko Alpha ONE has substantial weight to its performance. Bass is presented with restrained authority, but when listening you realize that if necessary, there is more on tap, much more. You can sense it.
Pink Floyds Dark Side of the Moon is one of my favorite LP’s, filled with subtleties and powerful dynamics. The full width of the recording is represented by the Nikko Alpha ONE like a ballet dancer with poise and control and punch of Mike Tyson. Surprisingly the amp doesn’t seem to run out of headroom. The power delivery is authoritative and smooth and the sound isn’t fatiguing.
If I had never experienced the SUMO Andromeda, this would be my favorite amplifier.
The build quality is exceptional. Heavy case work, mil spec epoxy circuit boards, high quality component parts and masterful circuitry.
This from Nikko’s circuit description “Voltage amplification is carried out in two differential amplification circuits. The first stage uses high resistant PNP Low Noise Transistors. The second stage amplification is accomplished with a current mirror circuit and a bass time constant which is better than a boot strap circuit. The power amplification uses a 3-Stage Darlington connection where in the last stage four power transistors are arranged in parallel, constituting a purely complementary quadruple push-pull operation. In view of superior sound quality in the most recently used power range, the first stage has been designed to drive 100 watts, the second, 30 watts, both in Class A operation.”
The sound of the amplifier is breathtaking. As with the Nikko Beta ONE preamp, I wonder why everyone in vintage HIFI isn’t talking about this amp all the time? Those in the know, know.
I can think of two speaker designers who test their speakers with this amplifier, and given the circuit description I can understand why. This is a sophisticated amp, with an eloquent circuit and an astonishingly good sound.
More to come!







































