Classe DR-2 vs Classe DR-3


Does anyone know the differences between these 2 vintage class
A running amps produced by Dave Reich?
lula
Hello from germany, I'm looking for such CLASSE or ELESON
amp. ! Could you help maybe?
Regards, Wolfgang
A local friend of mine had either the DR-2 or DR-3 I don't remember which one. I think it was 25 wpc? Anyway, it is probably the best sounding amp I have heard or one of the top 2. These amps sound wonderful and I told my friend to keep it and never sell it...lol. Of course he did because he has huge inefficient speakers. Highly recommend these amps if you can find one.
Having owned DR-2, DR-3, DR-3B, DR-3VHC, I can confidently say they are nice amps with abaility to drive tough speaker loads. That said, compared to Mark Levinson ML-2 they sound grainer and more electronic. Better yet are the Pass Aleph amps, which are some of the most natual sounding SS amps ever made.
Sorry, I have not seen this thread in some time.

To answer Nurxhunter: Forced air should not be used because it raises the bias current. The amplifier, by design, seeks to reach equalibrium between temperature and electrical operating point. If you've ever had to wait for an amplifer to "settle in" for it to sound its best, it is because of this. As it is, the bias current of these amplifiers is quite high because of genuine class A operation, forcing it to go higher will shorten the life of the output devices because they will try to run hotter even though forced air may seem to make it run cooler. It was designed to be perfect without forced air - the huge heatsinks take care of that just fine.

You may also note that these amplifiers run cooler the harder you push them (as opposed to class AB amplifiers which get hotter) - that's because some of the power that is otherwise dissipated by the heatsink at idle is now going into your load. In other words, these amps run hottest during idle.
does the dr-3 also have the brick which is supposed to be placed between the heatsinks? what exactly is is for. I bought a dr-2 without the brick as the previous owner lost it and it seems to work just fine