Rolling KT150s in Primaluna hp integrated


I’m a mere five hours into these.  This is an alive and kicking tube.  It’s like it had a double espresso before the music starts.  I’m hearing big and strong delivery, but that’s so overwhelming that I cannot focus on midrange.  It’s clear I need some time with these. 
128x128jbhiller
@georgehifi  PrimaLuna emphasizes that they run their tubes about 1/2 -2/3 as hard as other manufacturers in order to NOT overrun the tubes, especially since PL encourages listeners to tube roll with expensive NOS tubes. I believe the amp also gets a more stable load and presumably lower distortion with not running the tubes so hard and hot. 

@a25105 In the Sta Cruz Mtns, gets up to the high 90s and tops 100' as well. problem is, I live in an old barn converted into a home with cinder blocks under the wood siding. Absorbs heat like a mo-fo. No AC. I would come home from work and not be able to listen to my system! And no plans to move soon.
But the heat from the PL Integrated is from the tubes and the 3 Large Transformers hiding in the back under the metal cover .... 
1graber2
@georgehifi
PrimaLuna emphasizes that they run their tubes about 1/2 -2/3 as hard as other manufacturers in order to NOT overrun the tubes, especially since PL encourages listeners to tube roll with expensive NOS tubes. I believe the amp also gets a more stable load and presumably lower distortion with not running the tubes so hard and hot.
Grabber, "running a tube hard or not" is just the bias setting for the tube. It has nothing to do with the heater/filament current which is the main producer of heat that comes from a tube amp.

Cheers George
Great idea George! I didn't think of that. Comparing test results through a Hickcock tube tester probably won't tell me all I need to know with regard to the effects of cryoing the original tubes and comparing directly.  
Great idea George! I didn't think of that.
I would also mark them so they go back in the same position in the amp.

Cheers George  
I agree with almost everything in this review of KT150s and the PL Dialogue Premium HP.  The characteristics of the KT150 in this amp are accurately described in my view.  http://www.hifi-advice.com/blog/review/analog-reviews/amplifier-reviews/primaluna-dialogue-premium-t...