Class A SS is not the way to go, because those amps run hot at idle.
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I have to laugh everytime I read about SOOOO much heat from tube equipment. I don't presently own any tube gear, but I've been an audiophile for 50 years, which is to say that I grew up with tube gear. So many audiophiles today act like they are in Dante's inferno. Must be extremely sensitive to a little warmth. Don't you have air conditioning? Not trying to hack anyone off, but to me it's just hilarious. Oh well, what the heck.
you must not live in Florida. I have 2 AC units for my 2 story house, and during the summer months, even with both units running, my audio room during the daytime is very warm. If I turn on my 845 based mono tube amps, within 45 minutes, I am down to my shorts. I think heat is a very valid concern.
I've never owned a tube amp, although I'll likely make the plunge eventually. However, I've owned a Plinius SA 102 amp (140 WPC in class A) for approx. 14 months, and have never had any problems with it heating up my 15' x 20' x 7' room. Yes, the amp runs hot to the touch, and I give it plenty of room to breath, but I'd be surprised if my room temperature even goes up 1/2 degree when I'm running it in class A.
Although Class A power amps are known for their great sound, they are very inefficient and will use a lot of power even when idling. It will be hot!! You may want to consider a Class A/B power amp which switches from Class A to Class B when full current is not being demanded of the power amp, which is probably 95% of the time.
Pinkus: I own land in Leesburg, Fl, but I never lived there. However, I did live in Tehran, Iran for 2 years in l965, l966, l966 where the temperature hit 110 degrees and my all tube system didn't bother me at all. I also have 2 Ac units in my current home in Tennessee (3500 sq ft) and I ran a Krell FPB200 which is a hot box, no trouble at all. I guess some people can't take the heat as well as others. I can sympathize with you. Enjoy the music.
Well I live in the SanFernando Valley of LA. It do get hot here in Chatsworth; no doubt about it. I ran CJ monos for years. Those be the Premiere 5's and 8's (28 tubes) I also had two dif. 845 SET monos and I never worried about my toaster going on the fritz.
I now have the CJ 350 ss. Mine runs cool to warm depending on how hard you push it.I can also say it is just a better amp than the 5/8's. I also had the Belles 350a ref. and it runs as cool as the CJ 350ss. Neither of these amps ever had me wanting me to go back to tubes. The cost of operation is soooo much nicer,too,w/ no tubes to replace.
I've got a Pass Aleph 5 - the mini furnace I call it. That baby can really crank out the btu's. And on a cold winter's night here in Maine, me and the Mrs just curl up next to that baby. Granted, it does not throw as much heat as the Waterford, but she has waaayyy lower Thd that that old beater wood stove. Hope this helps.
Your Pass will not run any cooler when it "switches", er I mean, leaves class A and transitions into B. What an interesting thread as I'm taking the digital plunge and trying a bel canto S300. My ARC VT100MKII is currently out of service at the moment (re-tube, patiently waiting for tubestore to restock 6550C; btw upscale deserted ARC VT owners, for no *real* reason; therefore I suspect the tubes may be questionable to begin with and the ARC VT's bear that out but, more than likely, whoever is re-tubing/biasing is not doing it properly).
I live in Virginia and summers can be quite toasty. Even with a good central AC our townhouse seems like it struggles to stay cool on those 95 degree humid as @#[email protected]# days. The tube amp will only make matters a bit more toasty. I will not be going to solid state for the preamp though, as this is where most of the magic comes from.
Minnesota has actually recorded the highest dewpoints anywhere in the world. We get very humid summers, with highs in the upper 90s and low 100s (usually in July). The smallest window air conditioner I could find will easily keep up with our S-30 in my living room- its class A and 30 watts per channel.
But- I would be looking into a class AB tube amplifier before I went with transistors! A class A transistor amp is going to make nearly the same heat as a class A tube amp- the filaments are a minor concern. IOW most of the heat comes from the class of operation. So a class AB tube amp will make **less** heat than a class A transistor amp will, assuming that they are about the same power.