Any word when the Pass X2 preamp Service imanual is available?

hifimaker · 3rd November 2004, 08:11 PM

Any word when the Pass X2 preamp service manual is available?
The pass website said coming soon.

How cool will that be?

-David

Nelson Pass · 3rd November 2004, 08:51 PM

I'll ask.

hifimaker · 4th November 2004, 07:38 PM

Thanks Nelson, I have shifted nearly all my hobby time activity back to hifi. Your designs are wonderful and fun to build and listen too.

you're the BEST!

-David

hifimaker · 12th November 2004, 12:05 AM

Gentle bump....

Hi Nelson, Just a suggestion... stare into this thread....

Publish it soon..

publish it soon...

-David

GRollins · 12th November 2004, 12:29 AM

Enough X material has been published that you ought to be able to throw together an X preamp circuit with your eyes closed by now.
I'll make a prediction--with the arguable exception of Wayne's volume control, the circuit will be pretty much what you would come up with if you put your mind to it. That's not to say that the circuit doesn't sound good...it's that by the time the dancer removes her seven veils, you'll take one look and say,"Hey, I know her!" It's the veils that add the element of mystery.
I've already tried several different X preamp topologies. Others have done it, too. Conceptually, it's not difficult. Just start with a BOSOZ and X it. I'm sure there'll be a few details that differ, but not enough to make you tear your hair out when you see the "real" schematic.
Nelson,
If the volume control is the holdup, just blank that part of the schematic. That way the dancer retains at least one veil, and you folks retain your intellectual property. The circuit itself will keep a lot of people busy just by itself.

Grey

moe29 · 12th November 2004, 01:48 AM

Grey,

Don't you know by now?

It's those damn dot.com-ers backing up the patent ofice!!!

jh6you · 12th November 2004, 04:06 PM

I believe Aleph P1.7 is "X."
We could mod it with +/- rails.
I don't know what is "2" of "X2".
I don't think that 2 means 2 stages because Nelson loves simplisity and, according to him, X works best when the circuit is getting simpler. I guess that P1.7 and X2 have the same heart and the same musical sense.

Drinking a cup of Chinese tea...

Lucas_G · 26th December 2004, 05:15 PM

I too am very curious!

Does anybody know whether the X-2 sounds different or better than the Aleph P 1.7?

Lucas

P.S.: How about posting the X-2 on New Years Eve?

Darry · 10th March 2005, 06:48 AM

Hello,

The 2 versions of the service manuals of the PASS X2 preamplifier are available.
http://www.passlabs.com/downloads.htm

The version 1 is complete.

For the version 2, there are no schematic of UGS3 and UGS4 circuits. The UGS circuits are the subject of a different service manual. It is not available.

Maybe that Nelson !!!

Regards

Darry

JEKYLL · 10th March 2005, 07:04 AM

Wonderful!

3rd November 2004, 08:11 PM	#1
hifimaker diyAudio Member Join Date: Oct 2003 Location: San Jose	Any word when the Pass X2 preamp Service imanual is available? Any word when the Pass X2 preamp service manual is available? The pass website said coming soon. How cool will that be? -David

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3rd November 2004, 08:51 PM	#2
Nelson Pass The one and only Join Date: Mar 2001	I'll ask.

4th November 2004, 07:38 PM	#3
hifimaker diyAudio Member Join Date: Oct 2003 Location: San Jose	Thanks Nelson, I have shifted nearly all my hobby time activity back to hifi. Your designs are wonderful and fun to build and listen too. you're the BEST! -David

12th November 2004, 12:05 AM	#4
hifimaker diyAudio Member Join Date: Oct 2003 Location: San Jose	Gentle bump.... Hi Nelson, Just a suggestion... stare into this thread.... Publish it soon.. publish it soon... -David

12th November 2004, 12:29 AM	#5
GRollins diyAudio Member Join Date: Feb 2001 Location: Columbia, SC	Enough X material has been published that you ought to be able to throw together an X preamp circuit with your eyes closed by now. I'll make a prediction--with the arguable exception of Wayne's volume control, the circuit will be pretty much what you would come up with if you put your mind to it. That's not to say that the circuit doesn't sound good...it's that by the time the dancer removes her seven veils, you'll take one look and say,"Hey, I know her!" It's the veils that add the element of mystery. I've already tried several different X preamp topologies. Others have done it, too. Conceptually, it's not difficult. Just start with a BOSOZ and X it. I'm sure there'll be a few details that differ, but not enough to make you tear your hair out when you see the "real" schematic. Nelson, If the volume control is the holdup, just blank that part of the schematic. That way the dancer retains at least one veil, and you folks retain your intellectual property. The circuit itself will keep a lot of people busy just by itself. Grey

12th November 2004, 01:48 AM	#6
moe29 diyAudio Member Join Date: Dec 2002 Location: Florida	Grey, Don't you know by now? It's those damn dot.com-ers backing up the patent ofice!!!

12th November 2004, 04:06 PM	#7
jh6you Account Disabled Join Date: Aug 2002 Location: Near to the Pacific Ocean	I believe Aleph P1.7 is "X." We could mod it with +/- rails. I don't know what is "2" of "X2". I don't think that 2 means 2 stages because Nelson loves simplisity and, according to him, X works best when the circuit is getting simpler. I guess that P1.7 and X2 have the same heart and the same musical sense. Drinking a cup of Chinese tea...

26th December 2004, 05:15 PM	#8
Lucas_G diyAudio Member Join Date: Nov 2002 Location: Netherlands	I too am very curious! Does anybody know whether the X-2 sounds different or better than the Aleph P 1.7? Lucas P.S.: How about posting the X-2 on New Years Eve?

10th March 2005, 06:48 AM	#9
Darry diyAudio Member Join Date: Mar 2005 Location: Southwest	Hello, The 2 versions of the service manuals of the PASS X2 preamplifier are available. http://www.passlabs.com/downloads.htm The version 1 is complete. For the version 2, there are no schematic of UGS3 and UGS4 circuits. The UGS circuits are the subject of a different service manual. It is not available. Maybe that Nelson !!! Regards Darry

10th March 2005, 07:04 AM	#10
JEKYLL diyAudio Member Join Date: Jan 2004 Location: FRANCE	Wonderful!

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