Aleph P VS. Aleph L...Questions

Mark A. Gulbrandsen · 8th February 2004, 08:26 PM

I'm not a design engineer but obviously the major differences are that they are balanced and unbalanced designs but if one took the "L" ver 1 circuit and added Q-17 and associated components would there be any performance gains. I am assumming that Q-17 and parts are there in the "P" ver. 2 to allow cross coupling...but what other benefits are there? Or would there be any? Just looking at ways to improve the basic "L" itself.

Thanks in advance for any tips and answers!

Mark

zygibajt · 8th February 2004, 11:03 PM

The half of Aleph P1.7 seems to be almost the same as the L circuit,accept that negatie CCS.
I'm no expert here ,but I think that applying this CCS to Aleph L might bring some benefits.

Also if you want better sound than Aleph L build Aleph P.
Even using it unbalanced (negative input grounded and negative output unused) it sounds better than L.Not a whole lot but quite a bit better.Just a couple of mosfets and resistors more ,and still no need for balanced volume control.

Bartek

Mark A. Gulbrandsen · 9th February 2004, 01:15 AM

That is part of what I was wondering. Why don't I just build half of the P instead? For single ended use what benefit does the other half give me?

Mark

Peter Daniel · 9th February 2004, 01:18 AM

You could feed the preamp single ended and use balanced interconnects to the amps. If there is any advantage to balanced line, you would still benefit here.

zygibajt · 9th February 2004, 07:38 AM

I think even when used unbalanced in/unbalanced out Aleph P will sound better than half of it.I guess other half brings some improvements,some distortion cancelation,makes it diffrent/better preamp.

Bartek

8th February 2004, 08:26 PM	#1
Mark A. Gulbrandsen diyAudio Member Join Date: Sep 2001 Location: Salt Lake City	Aleph P VS. Aleph L...Questions I'm not a design engineer but obviously the major differences are that they are balanced and unbalanced designs but if one took the "L" ver 1 circuit and added Q-17 and associated components would there be any performance gains. I am assumming that Q-17 and parts are there in the "P" ver. 2 to allow cross coupling...but what other benefits are there? Or would there be any? Just looking at ways to improve the basic "L" itself. Thanks in advance for any tips and answers! Mark

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8th February 2004, 11:03 PM	#2
zygibajt diyAudio Member Join Date: Jun 2003 Location: Wroclaw	The half of Aleph P1.7 seems to be almost the same as the L circuit,accept that negatie CCS. I'm no expert here ,but I think that applying this CCS to Aleph L might bring some benefits. Also if you want better sound than Aleph L build Aleph P. Even using it unbalanced (negative input grounded and negative output unused) it sounds better than L.Not a whole lot but quite a bit better.Just a couple of mosfets and resistors more ,and still no need for balanced volume control. Bartek

9th February 2004, 01:15 AM	#3
Mark A. Gulbrandsen diyAudio Member Join Date: Sep 2001 Location: Salt Lake City	That is part of what I was wondering. Why don't I just build half of the P instead? For single ended use what benefit does the other half give me? Mark

9th February 2004, 01:18 AM	#4
Peter Daniel diyAudio Member Join Date: Jul 2002 Location: Toronto, Canada	You could feed the preamp single ended and use balanced interconnects to the amps. If there is any advantage to balanced line, you would still benefit here.

9th February 2004, 07:38 AM	#5
zygibajt diyAudio Member Join Date: Jun 2003 Location: Wroclaw	I think even when used unbalanced in/unbalanced out Aleph P will sound better than half of it.I guess other half brings some improvements,some distortion cancelation,makes it diffrent/better preamp. Bartek

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