Opinions on Potential Amp Build

[M6NTL]

Hi,
I would appreciate the opinions of the 'amp specialists' in this here forum, as to what this looks like (on the surface anyway, obviously without a schematic it's hard to be sure) - looks like it operates in Class A for all the power I'll ever use.
Many thanks in advance...

https://www.ebay.com/itm/122441080945

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[Firebottle]

It's a class AB certainly but how much is class A is wholly dependent on the standing current.

That isn't given so very difficult to know.

[M6NTL]

It's a class AB certainly but how much is class A is wholly dependent on the standing current.

That isn't given so very difficult to know.

Thank you for your reply.
The listing states max 100W in Class A, so I guess that depends on bias.
Cheers...

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[M6NTL]

Hmmmmmmmm,
After a bit more thinking, I think I might just build a Pass F5...

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[grog]

F5 would be better for sure, but they give off a lot of heat, also depending on how nice you want it to look, the case/heatsinks can be expensive,
i'm also looking to build an F5, but might also build a ESP P101 for something cooler running. https://sound-au.com/project101.htm

[M6NTL]

F5 would be better for sure, but they give off a lot of heat, also depending on how nice you want it to look, the case/heatsinks can be expensive,
i'm also looking to build an F5, but might also build a ESP P101 for something cooler running. https://sound-au.com/project101.htm

Interesting read, thank you!

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[Blackdog]

I wouldn't trust that to run more than 10 watts class A. There is not enough heat sinking, and the fins run the wrong way to dissipate the heat.

[M6NTL]

I wouldn't trust that to run more than 10 watts class A. There is not enough heat sinking, and the fins run the wrong way to dissipate the heat.

Thanks for the advice.

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[JRead]

Hello M6NTL,

I agree with Blackdog, when I saw 100 Watts Class A a little work out resulted in 344 Watts continuously to be dissipated by those heat sinks, at +/- 45 Volts about 3.8 Amps.
The 10 Watts would be fine though, few speakers actually need more, most of the time we listen to about 0.25 Watts.

Cheers - J

[M6NTL]

Hello M6NTL,

I agree with Blackdog, when I saw 100 Watts Class A a little work out resulted in 344 Watts continuously to be dissipated by those heat sinks, at +/- 45 Volts about 3.8 Amps.
The 10 Watts would be fine though, few speakers actually need more, most of the time we listen to about 0.25 Watts.

Cheers - J

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