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Old 24th October 2005, 06:44 PM   #1
MikeW is offline MikeW  United States
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http://www.passlabs.com/downloads/x_om.pdf
Page 8
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Old 24th October 2005, 06:49 PM   #2
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Then why do you not download the X350 manual from the download page of Passlabs.
And do a search :
NP posted lots of info on the components used at Passlabs.
Capacitors used previously: Mallory, now Cornell Dubilier.
The manual states "big cans", that will make them computer grades.
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Old 24th October 2005, 07:52 PM   #3
Michele is offline Michele  Italy
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Default X350 Power Supply

I'd like to buy a mint condition used X350 Amplifier. I'd like to know tecnical information about power transformer power, capacitors etc.
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Old 24th October 2005, 09:32 PM   #4
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Didn't I just answer your email?
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Old 24th October 2005, 09:55 PM   #5
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So, NP when can we expect to see schematics for the X series
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Old 24th October 2005, 11:13 PM   #6
moe29 is offline moe29  United States
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We really should respect Pass Labs products that are in production...

The Pass Labs gang have to make a living you know!


(that said there's a thread dedicated to the X amps that has a sticky on it...)
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Old 24th October 2005, 11:58 PM   #7
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Buying a new or used one? No problem. Used, see Reno Mark (frequently seen on ebay with Pass gear--but also has his own website--currently listing an X350 for sale...hint, hint). New, see any current Pass dealer.
DIY? Surely you've seen enough snippets by now to be able to cut and paste a 350W "X" amp. First, divide the wattage by four. This tells you how big each side is--i.e. a little less than 90W/side. Now, build two 90W amps and glue them together back-to-back. Use any of the differential variants that have appeared in this forum for a front end, although you may need to feed 'em steroids, depending on which one you choose.
Okay, so now you need to build a power supply. That's not so hard. You'll be looking at rails something on the order of 40-45V. That's no problem, look at all the people who've built Aleph 2s. To make life easier, you won't need quite the current capability, although no one is going to fuss if you just 'accidentally' happen to run the amp up a little higher into class A territory.
Poof!
Instant X350.

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Old 31st March 2006, 03:54 AM   #8
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I am also interested in the X350. What are the DC rails? Is is a "bridge/ balance design" i.e. both sides hot?

Can it drive a nominal 2 ohm load?

thanks!
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Old 31st March 2006, 04:23 AM   #9
Blues is offline Blues  United States
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Quote:
Originally posted by K-amps
I am also interested in the X350. What are the DC rails? Is is a "bridge/ balance design" i.e. both sides hot?

Can it drive a nominal 2 ohm load?

thanks!
If some people hadn't abused NP's generosity we would by now be discussing/building the X-amps as designed by the Master...PassLabs now lists these amps as "Discontinued".
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Old 31st March 2006, 10:11 AM   #10
K-amps is offline K-amps  United States
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Actually I meant, I'd like to buy one... I need to know if it can drive my 2 ohm nominal (1.5 ohm min) DIY speakers because my Krell blows it's 10 amp fuses
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