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Audio Dynamics- a.k.a. NAD?

M Jarve

Audio Geek and NGE Freak
After work today, I looked through the local CL for giggles and saw an ad for a "Audio Dynamics Component Stereo System". First thing I thought was that it was some sort of white-van scam, but the picture looked dead-on NAD. I figured that perhaps someone had just fumbled the name. If indeed it was NAD the asking price was stupidly good- $50 for a matched integrated amp, tuner, and CD player with all the original documentation and remotes.

I responded as quick as a bunny and found out that the guy lived only a block away. I toddled over and sure enough it was Audio Dynamics but the gear just screamed NAD.

He told me that he bought it from Montgomery Wards back in the 90's and that he had gotten a swell deal on the set- apparently there was a matching tape deck as well, but he did not want it at the time. All the equipment itself if dated 1988.

Anyhow, back to the kit. All the components were in like-new condition and the build quality was very good.

The integrated amp features 4 toshiba output transistors per channel, a very good sized toroid transformer and a bank of 4x 10,000µF caps. Power output, as per the manual, is 100WPC continuous @ 8Ω, 120WPC continuous @ 4Ω. It also gives a distinctly "NAD-esqe" dynamic power output: 150WPC @ 8Ω, 225WPC @ 4Ω, and a whopping 325WPC @ 2Ω. With the listening I've performed with the Infinity Quantum 3, it seems to have no issues whatsoever with low impedance or demanding loads. Additionally, the phono section can be attuned for either MM or MC carts, and uses FET's.

The tuner is very simple inside and contains a so-called Schotz Noise Reduction system, which, I have to say, is quite effective with my local MPR classical station. It does not collapse the image as does the high-blend on my Sony ST-5950D. I have not checked the ability to pull in distant stations yet.

The CD player is pretty high quality. The transport slides out of the chassis and features something akin to the Pioneer Stable Platter system. It uses a single Burr-Brown PCM56 DAC, and the analog output stage looks to be very well made. I have not connected it up yet, nor checked to see if it can handle burned discs.

The integrated amp features a remote that was apparently designed to control the whole series of components, with the amp controls up top, followed by the tuner, CD player, and tape deck. The remote itself is a bulky affair, and has a large, peculiar capsule shaped IR emitter window that continues over the top of the remote. Quite interesting, and it takes 4(!) AA batteries.

So, I guess I'm curious as to whether these are indeed, as I think, rebadged NAD kit, and if so, what models they appear to be based off of.

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Try the Google - looks like Audio Dynamics = ADC of cartridge fame. They were owned by BSR at some point, as printed on the back of one of the cases in the photo. Also related to DBX.
 
I have two Audio Dynamics B-200 Amps, DBX is the same, you can usually find more info on the DBX brand. I beleive mine were from some where in Mass. Mine sound great at 200 wpc.
 
perhaps they used the same asian sources as NAD at the time . i have several NAD
and Proton receivers which are VERY similar, down to the same buttons and hardware,
Schotz tuner, same amp w/ 6db headroom....

perhaps they are all of a common source..
 
perhaps they are all of a common source..

They are not the same corporation (NAD being Canadian and Audio Dynamics I think American)

NAD contract manufactured cheaply in Asia and I think that the above is probably correct.... that AD did also and whoever did the assembly subcontracted for similar components, hence the design similarities.
 
I have that tuner, very nice.

I had a Stereo Review mag that reviewed that amp, very favorable.
 
OK, I tried to take a close look at the pictures, and if I am reading the back of the top unit right, it says that it is "Certified Only To Canadian Code". Now, the picture is a little blurry, but I think that I have a fine eye for things like this. M Jarve, can you verify this? It looks like that it says it on the top left corner on the back of the unit.

Personally, after all of the NAD equipment that I have seen, I think that these really are re-badged NAD pieces. Just like the Audio Dynamics amplifier, the BX200 from DBX, could be considered a Yamaha. Personally, I am not sure, but those ADC pieces that you have are dead ringers for NAD. It could be that the units were assembled in Japan, but the parts came from NAD, or something like that. The possibilities are endless.

Does anyone have a picture of the DBX power amplifier, with the digital power meters? Lets see if you can post it so I can take a look at it!



-Jason
 
really? all the NAD stuff i have says: LONDON/BOSTON , and i always assumed NAD was an English corp first....

NAD was formed in Europe originally. While its main office may or may not be there, as far as North America is concerned, I believe it is accurate to say that "The Lenbrook Group", an audio distributing company based in Canada, has purchased a significant (if not total) interest in NAD. I'm not 100% certain of my facts and I'm sure someone has more accurate information. But I do believe that the Lenbrook aquisition came in the past 10-15 years. The classic NAD products from the 80's were from a Euorpean based NAD.

j
 
From memory you are pretty bang on. The classic 3020 era stuff was from a company based in Europe that subcontracted production to Asia. By the late 80s, early 90s Lenbrooke was the Canadian distributor and they brought some folks from NAD into our store for a visit and product training. We were all quite surprised to learn that they considered themselves a Boston based company at that point, since we thought they were UK based. We were also surprised to find it was a very small company. Just a few design, graphics and marketing people which makes sense since production was farmed out. Don't quote me but I seem to remember the head count in Boston at the time being 16, maybe a bit more. Sometime after that Lenbrooke, who also distributed B&O and PSB among others, bought them out.
 
We were also surprised to find it was a very small company. Just a few design, graphics and marketing people which makes sense since production was farmed out. Don't quote me but I seem to remember the head count in Boston at the time being 16, maybe a bit more. Sometime after that Lenbrooke, who also distributed B&O and PSB among others, bought them out.

You'd be surprised at how small many of the higher end audio companies are. I remember being a bit shocked when I found out that Madrigal Audio Labs (Levinson, Proceed) were not all that larger (sales revenue wise) than the two storefront high(er) end a/v retailer I worked at.

j
 
doesn't matter . NAD , Proton , or ADC...... them's some great sounding amps. (period)

Schotz tuner, 6^db headroom , balls galore... and sound great.
 
You'd be surprised at how small many of the higher end audio companies are. I remember being a bit shocked when I found out that Madrigal Audio Labs (Levinson, Proceed) were not all that larger (sales revenue wise) than the two storefront high(er) end a/v retailer I worked at.

j



Was that during the days Mark Glazier was there? He came to our shop a few times. We were not too surprised to find out that was a small outfit before being acquired by Harman. Not much volume in the very high end.
 
Hi, just wanted to add:

I've got a Schotz tuner by Proton which was made in Taiwan in the same factory as the NADs of its time.... yes they were built there but build quality is still first-rate as far as i can tell.
 
Well, I have some more listening time in with the CA-2000E (the integrated amp), as well as the tuner. I was also able to verify that the CD player does work (quite well) and can read burned CD's- though it does have "issues" with any slight smudge or scratch.

The amplifier is brutally powerful. I was able to clock transient peaks of 29-volts into the Infinity Quantum 3 (~210-watts @ 4Ω) with no visible clipping of the signal- it should be able to meet its "dynamic power" spec without issue. The amp also showed no signs of stress when playing into the Quantum 3's for an extended period at what I consider very loud levels. The heat-sinks only became slightly hot to the touch and measured 114ºF with an ambient temperature of about 74ºF. The low/complex impedance of the Quantum 3 also never caused the amp to shutdown due to too low of an impedance.

The output stage is servo controlled and the output exhibits negligible DC offset at startup (~4.5mV) which, after about 10 minuets drops to an insignificant 0.2mV.

The integrated amp is not DC throughout, however, except through the CD input and only then when the "Direct" function is engaged. Additionally, although there is a defeatable infrasonic filter (variously attributed to either 18Hz or 15Hz with an 18dB/octave slope), the amp shows no signs of passing very low frequency signal, such as woofer movement from a slight warp in a record. Given that my Yaqin MC-10L does reproduce such movement, I have to guess that either the servo detects such low frequency oscillations as DC offset and corrects for it quite quickly, or that there is some permanently engaged infrasonic filter that is set to a lower frequency than the defeatable one.

Still, despite this, or perhaps even because of it, the amp does not seem to lack one whit for bass energy, even down to the lowest notes reproduced in any music I have. A recording of a mortar firing is reproduced with exceptional impact. Synthesized bass as well as large pipe organ has all the power and room-moving power you would expect.

Midrange and high-end are also superbly reproduced. The tonal and sonic performance of the amp is very nearly as good as I've heard from a higher-power solid-state integrated amp, particularly at high levels.

The jury is still out on its lower-level performance, and imaging. My impressions so far are not entirely favorable, but I'm still experimenting with dialing in the speakers for best sound as well.

I don't think it is quite as good as my long-lost reference integrated, the h/k PM660, but it is quite easily comparable to the Yamaha CA-1010 that I enjoyed for some time. I do like it better than my Kenwood KA-7100, however, mostly due to the CA-2000E's very high dynamic power.
 
Was that during the days Mark Glazier was there? He came to our shop a few times. We were not too surprised to find out that was a small outfit before being acquired by Harman. Not much volume in the very high end.

I think he was with Mardrigal at the time (90's) but I don't recall him visiting.

j
 
Mike, that's a great recommendation for the integrated amp. I have the T-200 tuner (twin to DBX TX-3), and after an op-amp swap, it is exceptional sounding. Congrats on the find, and thanks for letting us experience it vicariously!
 
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