Well the RATA must be good if you prefer it over the Stasis. Don't sell it cheap.
( Sure is HOT > we've just started a week long heat-wave )
The amplifier really seems interesting > but that must surely be power supply over-kill 😕
I still prefer lots & lots of watts with anti-clip circuitry to prevent ANY significant distortion. FAST IS A MUST HAVE !
Not laughing. Looks interesting. Besides, I was Rat ***** last night.
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Well I don’t really understand the workings of amps ( apart from my Stasis 2 ) but apparently the use of the 2 x 500va transformers as opposed to the usual 2 x 60va transformers takes the amp from 30wpc to 60wpc without any distortion at maximum volume 🤷♂️
I'm thinking that because the amp. is capacitor-coupled output, the output stage is probably biased @ half the rail-voltage >
meaning the amp. is probably Class A. This would explain the 'massive' power supply and said sublime sound 🙂
meaning the amp. is probably Class A. This would explain the 'massive' power supply and said sublime sound 🙂
Guys it really doesn’t get that hot especially compared to some class A amps I’ve had in the past like Alchemist, Musical fidelity, Marantz pm4 and many more .
None of this makes even the slightest sense. It's clearly a low bias amp using premium parts. OP has unfortunately failed to provide a circuit.
Yes, I failed to look at the heatsinks > it couldn't possibly be Class A.
I now think this amp. is quite a curiosity.
It might just be a 'time old' design ( with modern premium parts ) that actually uses the output capacitor to block fluctuating DC offset.
I now think this amp. is quite a curiosity.
It might just be a 'time old' design ( with modern premium parts ) that actually uses the output capacitor to block fluctuating DC offset.
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What it would be is a stiff +/-35V power supply. That will put out the necessary +/-31V swing with realistic transistor and emitter resistor losses. It takes 500VA transformers to keep the supply stiff - any less and you either won’t get that much power OR you need more starting voltage. Those heat sinks should be good enough for 15 watts each, or (35^2)/(10*8) which is worst case at 8 ohms. Since it never goes that high with music, it will tolerate 4 or 2 ohms unless you’re turning it up to distortion.
An amplifier with a 100 or 200VA transformer, making loosesy-goosey +/-45V (or even 50V) rails would put out the same power, run HOTTER, and subjectively sound dirtier with less bass when run to clipping. And probably be marketed as a higher power amp.
An amplifier with a 100 or 200VA transformer, making loosesy-goosey +/-45V (or even 50V) rails would put out the same power, run HOTTER, and subjectively sound dirtier with less bass when run to clipping. And probably be marketed as a higher power amp.
Anyway we are not using our equipment to listen to music but we are using the music to hear our equipment....this one might be just fine for the job....
My question is, where do you find all this weird and wonderful stuff?
Just the usual places but I think the key is taking risks on buying items that the frugal hifi weirdo’s won’t touch because it’s not boxed or doesn’t have a service history and perhaps more importantly they don’t know how it sounds, I like the not knowing and I’ve found that the stuff that those guys will buy because it’s “safe “ is boring or just average ( Naim for example 😉 )
