Thought that I would post this here as well, as it is very revelant to the NAD 3120 and NAD 3020.
While delving through some old archive material on audio I came across a review on the NAD 3020 from The Audio Critic, Volume 2 Number 2 - Summer/Fall 1979. The report was titled-"A Genuine Breakthrough in Inexpensive Integrated Amplifiers". Model tested was sr # 3225220 on loan from NAD. Price $175.00. Two Year Warranty. The following is the review and I quote.
It looks unassuming rather than cheap-a simple black box with a full complement of controls,including bass and treble, as well as a five-LED peak power indicator monitoring for both channels and displaying the higher output at any instant. The LED'S are labeled 1,5,10,20 and 35 watts into 8 ohms,the last is about 2 1/2 dB above the obviously ultra conservative 20/20 watt continuous power rating.
The unit came to us very highly recommended, so we threw the toughest test at it right up front. With a variety of speaker systems, we A-B-ed it against our very best pre amp/power amp combination, the Cotter System 2 feeding the Rapport Amp-1.(The latter has meanwhile become extinct.)The price ratio of A and B in this test was roughly 15 to 1. Well, what can we tell you? Everyone who was listening agreed that the NAD wasn't as good. Everyone also agreed that the difference was amazingly small. Both signal paths sounded clean, transparent, unstrained and musical. The NAD 3020 had a somewhat less open, neutral and finely detailed sound; it clipped a bit sooner;nevertheless it wasn't really a let down to switch to it because it was completely free of the hard "electronic" quality of most transistor amplifiers, cheap or expensive. If the Cotter/Rapport combination hadn't been available then and there as a reference, the NAD would have been accepted as just right-that's how good it is. By itself, it's difficult to fault it in clarity, smoothness and just plain accuracy.
We were able to make further and more detailed listening comparisons, since the 3020 can be separated into it's preamp and power amp sections via jacks in the rear. Thus it can be inserted into a reference system either as a preamp or power amp and A-B-ed against others. What we found out about it that is equally impressive. The preamp section ranks just below the top five or six separate preamplifiers we have tested so far at any price! and doesn't sound dramatically inferior to any of them. It never gets hard or overbright and is just a tad short of the ultimate in transparency. If the RIAA equalization were more accurate we could almost begin to talk about "Reference B" quality. As it is the error curve drops to -1dB at 20Hz,bunps up to + 0.2dB at 430 Hz, and shows a gradual decline above 1 kHz, down to - 0.7 db at 20 kHz in one channel, - 0.4 dB in the other. Not to bad, but not excellent. The power amplifier by itself is perhaps even more remarkable; next to the Hafler DH 200, for example, it sounds a little compressed and less open,but smoother and sweeter, without any trace of that hard glint on top. In other words, it isn't totally surpassed by the Hafler, which in turn is surpassed by only six or seven other power amps known to us, at any price. For a $175.00 amplifier with a free preamp thrown in,that's not bad at all.
The subjective perceived dynamic headroom of the 3020 can be increased by switching in the "soft cliiping" feature, of which NAD appears to be inordinately proud. In our opinion, this is a double edged gimmick that takes some of the unpleasantess out of frequent clipping when the amplifier is being pushed but also impairs the depth and three dimensional detail of the reproduced sound. Our rating of the NAD 3020 is based on it's sonic quality with the soft clipping switch in the off position.
The most interesting question, of course, is how NAD is able to do so much for so little. What do they know that others don't? New Acoustic Dimension is an international organization, originally founded and financed by a group of dealers, with offices in several countries and production facilities in Taiwan. Being dealer-based gives them a realistic outlook on consumer needs; having access to reasonably skilled labor at relatively low cost gives them an edge in price. The 3020 isn't built like a Mark Levinson amplifier but uses parts of fairly decent quality in all the important places and makes a few compromises wherever the penalty is tolerable. The designer of the entire line is Bjorn-Erik Edvardsen, a Norwegian now living in London,who has some very strong convictions about spending the available production budget on sound rather that cosmetics and sales features. He also seems to have a set of highly intelligent and effectual priorities in circuit design,giving us further evidence in support of our long-standing conviction that good thinking costs no more than bad thinking.
We were fascinated to find, for example,that the 3020 is not only bandwidth-limited to reject infrasonic and ultra-sonice garbage but also happens to use high-pass and low-pass characteristics that are very similiar to those of the state-of-the-art Cotter NFB-2 filter/buffer. Not that the Cotter filter's highly sophisticated time-domain correction is entirely duplicated, but the magnitude of the low-frequency roll-off is about the same and the measured rise time of 9 microseconds is exactly the same. What a coinidence and what a corroboration! DC-to-light freaks eat your hearts out. Correctly bandwidth-limited systems simply sound better. Large output transistors that are coasting most of the time, not much feedback, a very carefully designed power supply, and no current limiting protective circuitry are some of the plausible reasons of the 3020's sonic success. Without any allowance for its low price, this must be considered a thoroughly modern amplifier, designed with total awareness of errors of the past and obviously capable of handling complex speaker loads with aplomb. We're impressed beyond our wildest expectations.
The one thing that remains to be seen is whether or not the NAD 3020 will perform as impressively after years of heavy use as it does when it's new. We gave our sample as much of a beating as we could and found no change taking place, but we can't make any unqualified promises. It just isn't a mil-spec amplifier. It would be a pity, though, if all the $1,000.00 preamps and $1,000.00 power amps that are better built but don't sound nearly as a good outlived it to pollute the ears of our children. End Review/End Quote.
So here we are some 25 years after the introduction of the NAD 3020. While I no longer have my 3020 due to FP&L frying the 3020 with a power surge, I do have the 3120, which is the same unit sans the tone controls and LED'S. I can attest that the peformance has remained faithful all these years. This unit along with the NAD 4020 Tuner now occupy my office at work. Everyday I have to chase staffers out of the office, so I can get some work done! My reference system at home is my Forte Class A system. Yes it is better that the 3120. But the funny thing is, I have yet to get tired of listening to the 3120 and apparently my co-workers don't either.
Truly this is a product that has stood the test of time and has remained faithful. It just doesn't get much better than this. No wonder this has in the ensuing years become an icon in audio.
