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Old 2nd January 2008, 02:30 PM   #1
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Default preamplifier Pass X2.0/1

I have been searching on the forum for members who buit this preamplifier but couldn't find anybody.

I already have built the aleph 1.7 and before to invest money for good parts i would like to build something else to check out if another version could satisfy my needs better than the aleph P.

I would like to know if anybody have tried this pre and the eventual impressions.
I have the service manual for the X2 rev.0 and rev.1 and the only difference seems to be the positive rail voltage supply that from 85V goes up to 90V.
I was wondering if anybody has a more updated service manual.
The last version should be the X2.5 ...i don't know...something like rev.3 or rev.4.


Thanks in advance for the attenion.


Best,
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Old 2nd January 2008, 08:23 PM   #2
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I also got the SM for the X0.2-3.

With regard to this model, i found a post posted here long time ago, where members were wondering what the blocks UGS3,4 might be.
On the SM that i have it is not very clear.

I would like to build this preamplifier and compare it to the Aleph P1.7.

Can anybody help me to clarify the schematic for the X0.2?
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Old 2nd January 2008, 08:50 PM   #3
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The Pumpkin seems X0 inspired and a bit more sophisticated. Too bad that thread is so difficult to follow

I think there have been a lot of discussions here about the UGS blocks.

The main reason X2 does not seem popular is the absence of a group buy. We love being diyers, especially if someone else does the work.
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Old 2nd January 2008, 09:04 PM   #4
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well if i can have the schematic i don't have problems to draw a board and test it and share and build the project with everybody here on the community.

I was just wondering if maybe ...since people were wondering about 3 years ago what there is inside the black box.... maybe now.....3 year later.....the SM might be accessible....i don't know...
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Old 3rd January 2008, 10:13 AM   #5
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nobody is interested?

...it seems to be a very nice ...interesting....challenging....i think it is a better project than the Aleph P or Aleph L ...but i might be wrong...

Hope that interest on this project might rise up and as what happened with the AlephX to be able to build a DIY version of the pre X2...

GRolliiiinnnnnn hheeeellllpppppppp.....

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Old 3rd January 2008, 10:37 AM   #6
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Quote:
Originally posted by Stefanoo
challenging....

Challenging, huh? Have you not been trying to buld a 1.7 over the last one year? Does it still keep blowing up? Not challenging enough?

Have you taken a look at Choky's Pumpkin and Chef De Gaar's UGS?
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Old 3rd January 2008, 10:56 AM   #7
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mmmm....

yeah the challenging with the aleph P was enough fun...but now it is over.
I tested the sound and found it to be good but not what i was exactly searching for.
It is nice and most of all there will still be a biiig improvements once and if i will change the coupling capacitors and match the IRFs...i know.

But a certain point i decided that i would have liked to make something more up-dated....and my attention was caught by the X2 preamplifier.

Your reply gave me the hint to check out the pumpkin preamplifier.
I am reading it...it is a little confusing and full of slang that sometimes makes thing harder for who is not an en mother language...but anyway...
It seems very interesting....i haven't read it all yet...of course...i quick checked the different pages and with my dismayed (maybe i'm wrong) i haven't found any comment from Nelson Pass...and nobody at leas for what i have seen up so far....talks about the sound.....or comparison....but i'll keep looking.

I'm interested on deep-in the subject of the pumpkin and re-make the layout for different parts.

I haven't gotten though Chef De Gaar's UGS.....what is it?
Is it a possible interpretation of the UGS blocks from this guy?

Where can i find it?


Thanks for your interesting hints
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Old 3rd January 2008, 11:02 AM   #8
Zen Mod is offline Zen Mod  Serbia
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http://www.diyaudio.com/forums/showt...25#post1389725

Cook Book

for UGS - just search for threads with UGS in name , and cheff

..............
http://www.diyaudio.com/forums/showt...13#post1002713


edit:

regarding sound - you expect ......... maybe is time to try toobz ?

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Old 3rd January 2008, 11:23 AM   #9
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Buon giorno stefanoo,

Reagrding cheff's UGS,
If you like french slang you can take a look there too: a lot of infos and reviews provided :

http://www.homecinema-fr.com/forum/v...855852adaf9c54

http://www.homecinema-fr.com/forum/v...er=asc&start=0

Manu
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Old 3rd January 2008, 11:32 AM   #10
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Quote:
Originally posted by Manu
Buon giorno stefanoo,

Reagrding cheff's UGS,
If you like french slang you can take a look there too: a lot of infos and reviews provided :

http://www.homecinema-fr.com/forum/v...855852adaf9c54

http://www.homecinema-fr.com/forum/v...er=asc&start=0

Manu

hehe - crazy frenchies ....

133 pages in first link!
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