I´m wondering how comercial Amps can give up to 70-80w /channel class A.
But we can olny get about 25w on the same amount of cooling area?
But we can olny get about 25w on the same amount of cooling area?
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Maybe because the commercial amps are only class A for the first few Watts of power, then slip to A/B.
Domestically, something in the corner too hot to touch is usually a heater and not an amplifier.
Domestically, something in the corner too hot to touch is usually a heater and not an amplifier.
In the 70's and 80's they were a lot of commercials gimmicks around class A in order to appealed to the Audiophile who wanted the best of both world by promising class A with high power. They were just that : gimmicks.
In the context of Pass Labs this topic may also mean the extended class A area of mosfets used without degeneration.
Square law push pull class A amp can theoretically produce up to x4 the power of a regular class A amp with the same idle dissipation.
😀😀😀: VFet CSX1 😀😀😀
I have experience with Luxman during my highschool years in the early 90s. Back in Canada I was plenty loud with the M-117 (same as M-03) rated 200w x 2 @ 8 ohms. I used Klipsch Chorus speakers.
Today, with wee bit more efficient Klipschorns, the 20 watts x 2 in my CSX1 is EASILY as loud as my Luxman setup back then. Quite simply the 20 watts does not reflect it's true power output. 😎
As a reference on speaker efficiency, Klipsch has been know to exaggerate these figures on their speakers. If I recall correctly, the Chorus were 99db sensitivity and the Khorns 104db. Correct me if i'm wrong but for every 3db in loudness you need a doubling in wattage, and to get a perceived double in SPL you need a x10 factor of amplifier wattage. Me think 5db difference on speaker, with 10 times rated wattage difference 20 watts vs 200watts - there's something i'm missing in this math. Either the speaker efficiency ratings are not right, or the Luxman 200 watts per chan output rating is not right, or the square law excessively exaggerates the true output rating in PP amps.
The two amps that I recall being true Class A were the Krell KSA-50 and KSA-100. They were well reviewed by Stereophile. I wish I could listen to a KSA-50 to hear how it compares to a First Watt amp.
cute Brute, having own charm
though, no Finesse you'll find in each Papamp
proper specimen should make nail sing
though, no Finesse you'll find in each Papamp
proper specimen should make nail sing
although I never heard one, boulder makes classA amps
here is cheap one 🙂
Boulder?s New $195,000 Super Amplifiers An outstanding 1,500 Class A Watt 450 lbs model 3050 monoblocks! Plus an interview with Boulder?s Rich Maez Article By A. Colin Flood
here is cheap one 🙂
Boulder?s New $195,000 Super Amplifiers An outstanding 1,500 Class A Watt 450 lbs model 3050 monoblocks! Plus an interview with Boulder?s Rich Maez Article By A. Colin Flood
those Precognition gimmicks are good for General Audiophoolery**
not saying that amps are not good, just MumboJumbo is what is always pulling my nerve
though, they (whoever wrote silly claims) can't be bothered with my ramblings, not their target group, for sure
** in Audio - only at LP Cutter lathes, precognition was good thing
not saying that amps are not good, just MumboJumbo is what is always pulling my nerve
though, they (whoever wrote silly claims) can't be bothered with my ramblings, not their target group, for sure
** in Audio - only at LP Cutter lathes, precognition was good thing
Naim Audio seems to be doing well with their Class B amplifiers. What's their secret and command to charge a high price tag?
Class A operation by definition is when “the active element remains conducting all of the time”. Various biasing schemes fulfill this criterion. But only some of them are meaningful in context of power audio amplifier. Class A operation is a tool for overcoming the problems of Class AB operation investigated here Power amp OUTPUT STAGE measurements shootout. Not all Class A implementations are successful in that. Conversely, some Class AB implementations can get pretty close.
I have a pair of Pass Labs XA60.5 amps, info claims they are class A. That's 30w output per heatsink and they do get fairly warm.
Only 70-8W class A/channel? What lightweights! 😀
Pass Labs XS300 mono blocks give you 300 watts of pure Class A power per channel!
Here is a link to the full range of Pass Labs Class A amplifiers.