Further down there was thread about your CA-100 running hot. I just got my CA-101 today. Have had it rocking the living room at appreciable levels for over 5 hours now, and it's barely warm to the touch.
It is really a different beast from my Assemblage ST-40 tube amp. Has more of a "in your face" sound to it. It's not bad, just very transparent compared to the ST-40. Maybe the ST-40 rolls off the highs a bit and I am used to it's sound. The CA-101 seems to present everything as it is, without much of a sonic character of it's own. It does not have the slight harshness that my Carver A-500x could exhibit at times.
Classe CP-50 Preamp
Classe CA-101 amplifier
Philips SACD-1000 player
Yamaha NS-1000M monitors
Running tempature isn't a good indicator of whether an amp is Class A or AB. If it runs warm but not hot, it could be due to inefficient heat transfer from the output stage to the heat sinks. Best to call Classe' on the subject.
I owned one and it dissipated only 400 W heat at idle. Despite Krell's claim of Class A operation to full output, the last Krells to actually do it were the heroically-massive KRS monoblocks.
based on emitter resistor voltage drop measurement and AC line power draw. But it runs pretty hot (meat thermometer dropped into a cylindrical gap of same size in heat sink gave reading of 130-140 deg,) even though it seem to have much more heat sink surface are compared to the KSA-150.
...to an MDA-300 monoblock, Krell cranked the bias up a bit more to run closer to 60 W Class A (out of 300 W into 8 ohms).
I think each KRS-200 monoblock dissipated 1.6 kW continuous at idle. Now that is a LOT of heat! Alastair Robertson-Aikman of SME owns a pair to power 2 Quad ESL63's/channel.
I agree. There are outstanding class AB biased amps out there and they are usually more "practical" from a power consumption and heat dissipation stand point compared to full class-a. My AB biased push-pull tube amp sounds better to me than the class-A biased Aleph 3 and the tube amp draws less power.
Are you using your Tubes to drive Klipsch speaker's? I would imagine that the Pass Amp would do better with other speaker's instead of Horns.Just wondering if that be the case.
No amp in whatever class is a guarantee of good sound.There are synergy issues not to be over looked,but Krell's,Pass and a few other's usually get Class A ratings because of the non-synergy issues they overcome with most speaker's.Just a thought.
I am looking at Monarchy's for my next set of amps and they are Class A.Never owned a Class A amp before,but my amp is Bias'd toward Class A and is very transparent for a modified mid-price piece of gear and it's A\AB.
No, I'm driving regular ole dynamci speakers that have a couple 8" drivers and a concentric brass tweater. They are Tannoy Definition D500 speakers. The class-A biased 30-wpc Aleph 3 is an outstanding amp but in my application I prefer the AB biased push-pull 70-wpc CJ Premier 11a tube amp.
Scott - When I had my Thiel CS 1.5 speakers and the Classe CA-100, the amp ran a little on the warm side but never too hot. At least not compared to my Pass Labs Aleph 3 which is biased 100% class-a 100% of the time.
I did notice an over all improvement going to the larger CA-200 amp but again, this was with my less than efficient Thiel speakers. The Thiel CS 1.5's are rated at 4 Ohms nominal with a sensitivity of 86dB. If your speakers are somewhat efficient, the CA-101 should be more than adequate.
I think I was commenting on how hot the Aleph 3 runs. The Classe amps are more or less biased class AB and shouldn't run too hot.
Congrats on the new setup!
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