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FPB Series - Hot Running?

I'm sure the FPB series of Krell amps aren't cool running, but how hot do they run? Too hot to touch? Will they heat a medium sized room to uncomfortable levels without extra cooling? I'm specifically asking about the FPB-200 and FPB-300 - no interest in the 600. Thanks, Kirk
kthomas
kthomas OP
911 posts
 
Thanks to all who responded. My room is 14x18 and on the interior of the house, so ventilation / air circulation is an issue, and it sounds like one of the FPB (probably any pure class-A amp) would overheat the room. -Kirk
itsalldark
182 posts
 
I have a FPB-200c and it does get warm but not hot. Prior to this amp I had a KAV-250 which got extremely hot.
kthomas OP
911 posts
 
Itsalldark - That's interesting. It runs LESS hot than the KAV-250? That's the amp I have now, so I'm familiar with how hot it runs - definitely uncomfortably warm to the touch. I had assumed that a pure class A amp would run even hotter, but perhaps the plateau biasing keeps it cooler. Thanks, Kirk
itsalldark
182 posts
 
I was surprised as well, no comparison as far as heat build up or sound. Go for thr FBP200C, you will love it.
bob_bundus
1,834 posts
 
I don't get it - I had a KAV250a that was practically stone cold @idle; the top cover was always only slightly warm. Maybe it wasn't biased correctly & that's why I didn't care much for its sound?
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