Pass Labs Aleph 3 clone power amp. [Archive]

View Full Version : Pass Labs Aleph 3 clone power amp.

andyrlb

28-08-2022, 12:47

Joe Henry built class A clone which I bought just a few weeks ago on here ( plenty of info on here )
The ONLY reason I’m selling is because I’ve had a result on a pair of monoblocks.

There is a little ding on the rear right cooling fin .

Price is what I paid £650 , collection only from Milton Keynes for established members .

Dimensions
50cm Wide
40cm Deep
22cm High

Speaker protection
Dual toroidal transformers
Dual 50 amp bridge rectifiers
Dual power supplies
160,000uf Elna capacitors
Double-sided thick gilded PCB boards
Power Soft start circuit
Blue LED on/off switch
Input differential Transistors using the new US FU9210
DC blocker
Precise matching mosfets
Supply rail fusing
XLR balanced inputs
RCA inputs
Audio grade binding posts

SPECIFICATIONS
Gain 20 dB
Freq. Response - 0.5 dB at 2 Hz, 100 KHz
Power Output 30 watts/ch 8 ohms
60 watts/ch 4 ohms
60 watts/ch 2 ohms
Maximum Output 23 volts, 8 amps
Distortion (1KHz) 0.2% @ 30 watts, 8 ohms
1% @ 60 watts, 4 ohms
1% @ 60 watts, 2 ohms
Input Impedance 23 Kohm
Damping factor 100
Crosstalk > -80 dB 20-20 KHz

https://uploads.tapatalk-cdn.com/20220828/c68861eb913daf5d05f047f357c352e8.jpg

https://uploads.tapatalk-cdn.com/20220828/36176e2e907076444693a12b84747021.jpg
https://uploads.tapatalk-cdn.com/20220828/b15e94051c75021f2b84a9424907e44e.jpg
https://uploads.tapatalk-cdn.com/20220828/3ed61c0b332b97375369d6dd6574ccd9.jpg
https://uploads.tapatalk-cdn.com/20220828/6cd7c0c63c0355967e42c6907400b85b.jpg
https://uploads.tapatalk-cdn.com/20220828/40ba42ff4ca2cbd97a196148004ccd2a.jpg

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andyrlb

28-08-2022, 12:51

I may consider a swap for a quality preamp but it must have a remote control.

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Filterlab

29-08-2022, 16:52

Here's the internals. You won't find many components laid out like this; work of art...

https://i.ibb.co/7nJTpw5/IMG-2593.jpg (https://ibb.co/hBRndPj)

https://i.ibb.co/LP8fsNt/IMG-2594.jpg (https://ibb.co/b3PnGbB)

https://i.ibb.co/L8DdZn3/IMG-2595.jpg (https://ibb.co/80ng76H)

https://i.ibb.co/1mgz0ZP/IMG-2596.jpg (https://ibb.co/CHcPwBY)

https://i.ibb.co/VvGmxK6/IMG-2597.jpg (https://ibb.co/GVDT9hm)

andyrlb

29-08-2022, 17:25

Thanks Rob [emoji1303]

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philv

29-08-2022, 17:40

andyrlb

29-08-2022, 17:43

Lovely.
Tempted...but...
Just exactly how would i hide it from the other half?
Quite often i can buy gear and she won't even notice for months.
But i measured this out.
Can an amp actually get any bigger?

You could put a cushion on it Phil and say it’s a pouffe [emoji1787]

It’d be a great match for your kefs [emoji6]

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Filterlab

29-08-2022, 18:34

Thanks Rob [emoji1303]

You're very welcome good sir. :D

Just exactly how would i hide it from the other half?

You could tell her that it emits a frequency which is proven to make skin look younger and more vibrant.

:D

Filterlab

29-08-2022, 18:38

Can an amp actually get any bigger?

Yes.

https://i.ibb.co/N12n36F/76768-ED4-F34-C-4268-ACB9-C2-AA7513-DFA8.jpg (https://imgbb.com/)

And that's a monoblock.

:lol:

Barry

30-08-2022, 14:57

Lovely.
Tempted...but...
Just exactly how would i hide it from the other half?
Quite often i can buy gear and she won't even notice for months.
But i measured this out.
Can an amp actually get any bigger?

It is about the same size as one of my Levinson ML-2 monoblocks.

But yes, there are much bigger amplifiers than the Aleph clone - Colin Wonfor's TOCA monoblock for example:

https://static.wixstatic.com/media/b6554c_a7180a420aca40748b0e36dc6851be9c~mv2.jpg/v1/fill/w_280,h_280,fp_0.29_0.23,q_90/b6554c_a7180a420aca40748b0e36dc6851be9c~mv2.jpg

I saw these at an audio show at Heathrow many years ago. From their size, and at a distance, I thought they were speakers, but was puzzled by the granite fascias! Only by looking round the back and seeing the full height heatsinks and cable connections did I realise they were single channel amplifiers. :eek:

I believe the amps were an exercise in seeing how much Class A audio power could be wrought from a 13A mains supply.

Filterlab

30-08-2022, 19:34

Blimey o'reilly!

andyrlb

01-09-2022, 13:48

Sold

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