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Old 22nd May 2008, 10:59 AM   #1
rubydac is offline rubydac  Hong Kong
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Question How many supply voltage on Pass X0

Anyone know voltage which used in Pass X0 preamplifier ?
I don't know what's Pass X0, X0.2, X0.3 ?

Thanks
Rubydac
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Old 23rd May 2008, 03:24 AM   #2
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The regulated values are about +/- 32V as far as I recall.
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Old 23rd May 2008, 03:31 AM   #3
rubydac is offline rubydac  Hong Kong
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Default Thanks Mr.Nelson

Could I use this voltage to my ono diy ?

Thanks
Rubydac
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Old 24th May 2008, 08:17 PM   #4
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Yes, I believe so.
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Old 24th June 2008, 12:51 PM   #5
rubydac is offline rubydac  Hong Kong
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Default My PASS X0 (cloned)

I used base control board from PASS X2 with modified driver board (socket) from PASS X2 to PASS X0.

But I can't modify balanced input converter to Aleph ONO socket board (bigger size)

It's only my diy concept

Thanks
Rubydac
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Old 6th July 2008, 01:30 PM   #6
rubydac is offline rubydac  Hong Kong
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Default My modified PASS X0.2

I used PASS X2 proto board adapted to PASS X0.2 schematic, it's work very well I used 10mA at all mosfets output.

Please me Mr.PASS, Could you suggest me How many current that PASS X0.2 used, mA ?

Thanks
Rubydac
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Old 7th July 2008, 10:46 AM   #7
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Hi Rubydac

You can me sent the schematic from the X0.2 to my e-mail.
michbeh2000@yahoo.de

Thanks

Michael.
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Old 7th July 2008, 01:11 PM   #8
rubydac is offline rubydac  Hong Kong
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Default Sorry it's only diy

Sorry, I don't have schematic now my friend gave me his protoboards and parts overlay.

Thanks
Rubydac
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Old 7th July 2008, 06:14 PM   #9
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Hi Rubydac !

You can me sent the X0 drive.jpg in a better resolution?

Thanks Michael.
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Old 21st August 2008, 03:08 AM   #10
rubydac is offline rubydac  Hong Kong
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Default Fully completed

I measured a gain of this preamp it's only 12dB in unbalanced mode but I think it not enough dynamic punchy for my F5 cloned, it's too light with low watts amplifier.

Then I change poweramp to PASS ALEPH XA100 !!! surprise it's very punchy and so strong bass I LOVED IT

My next project is how to use solid state step attenuation volume control
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