FS - Joe Henry pass labs aleph 3 class a power amp clone

[philv]

Joe henry built to higher spec than his usual excellent offerings.

Collection from eton wick, near Windsor.

It owes me 680. So -

£680.

Or a deal against an audio innovations 700/800.


Photos to follow.

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

[philv]

https://i.imgur.com/82rKacv.jpg
https://i.imgur.com/rkfOHU5.jpg
https://i.imgur.com/Es5xmrY.jpg
https://i.imgur.com/enw5dsj.jpg
https://i.imgur.com/WPouBzl.jpg
https://i.imgur.com/VEtWLiy.jpg
https://i.imgur.com/WFvTrW4.jpg
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https://i.imgur.com/78w4bAM.jpg
https://i.imgur.com/tCurrYl.jpg
https://i.imgur.com/yhpOG8W.jpg

[Barry]

Beautifully built Nelson Pass design, and given the quality of construction a bit of a bargain. GLWS

[bumpy]

Hi
How old is this amp please and could you detail the improvements that make this a higher spec? Also how hot does it get with prolonged use?

Thanks
Chris

[philv]

Hi
How old is this amp please and could you detail the improvements that make this a higher spec? Also how hot does it get with prolonged use?

Thanks
Chris

I was going by the actual size of the unit and cooling fins, and the dual toridal transformers.
I have written to Joe Henry or clarification of spec and age.

For me, it only ever got warm, never hot.

[philv]

There was another joe henry aleph 3 sold on the se forums in 2019.

Smaller case, one toridal trabsformer.

https://theartofsound.net/forum/showthread.php?66179-FS-Pass-First-Watt-Aleph-3-clone

[philv]

Hi
How old is this amp please and could you detail the improvements that make this a higher spec? Also how hot does it get with prolonged use?

Thanks
Chris

pm sent with reply infor from Joe Henry.

[philv]

I emailed Joe Henry for further info about this amp.

It is indeed higher spec than normal.

He stated -

'This was built in october 2017. It was not the standard build.
This was built with good separation of the channels in mind.
Hence 2 toroidal transformers
2 Power supplies.
4 50Amp bridge rectifiers (2 each channel)
Speaker protection
Soft start module
EMI filtering
DC Blocker Module
You could say 2 monoblocks in one casing.
One picture Attached.'

This is a bargain.

https://i.imgur.com/zzM6gKu.jpg

[philv]

up

[philv]

Really enjoying this so withdrawn.
Sounds wonderful.

[Gregje]

Good decision!

[philv]

Back up for sale.
Briefly, until i change mind again!

[philv]

Sold