2. amps-preamps
  3. 162022-139155

When does my class Atoll IN200 A/B integrated switch from class A to class B?

I have an Atoll IN200 integrated amp (earlier version of this: https://www.atoll-electronique.com/en/products/integrated/integrated-in200sig/)

Having read a lot of praise about class A power, I’m wondering how to tell from specs when my integrated likely needs to switch from class A to class B?

The reason I’m curious is that I’m still wondering how my speakers might sound with a pure class A amplifier (such as Pass, etc.) but perhaps the integrated I have is already demonstrating much of that if there is a long enough delivery of class A power from it already? My speakers are 8 ohms, 87 db sensitivity, standmounts.

I apologize if this question is too simple; I hope I’ve posed it clearly.

P.S. This is not about dissatisfaction with my integrated or other gear (I have tubes, too). It's really just part of a longer term attempt to understand how different power sources change the character of a system, particularly the speakers.
128x128hilde45
hilde45's avatar
hilde45 OP
4,974 posts
 
It seems proved as BS. What I'm amazed at is that I confronted them via email with the evidence it couldn't be true and they just repeated the BS. I may give them one more chance to come clean but nothing really hangs on it -- I'm just a berserker-against-BS.
bubba12's avatar
bubba12
440 posts
 
Interesting thread. I've heard the Atoll and it's a great amp regardless. Paired with the Atohm speakers at AXPONA a couple years ago, they were top 3 at the show.

georgehifi's avatar
georgehifi
10,312 posts
 
It seems proved as BS. What I’m amazed at is that I confronted them via email with the evidence it couldn’t be true and they just repeated the BS.
If your 100% sure they said "The IN200 works in Class A up to about 40W under 8 Ohm" Ask them to come on here and prove it, and they'll get a new one ripped. 

But if they said
"The heat dissipation of all the heatsinks is 40w" this is probably correct. But this is a very different thing and has nothing to do about how high the Class-A ability is you’ll get into 8ohms.

Cheers George
hilde45's avatar
hilde45 OP
4,974 posts
 
George, I’ve quoted them verbatim. They claimed it twice. 
I like their product. That’s not in question. 
georgehifi's avatar
georgehifi
10,312 posts
 
I like their product. That’s not in question.
I not saying that it sounds bad, may sound good for all I know.

Just that there’s so much of this going on to catch out the gullible, it’s got to be pulled up, just like the "boutique" $150> snake oil ac fuses con that goes on.

Cheers George
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