Which Pass Aleph diy board for "no-cost-object" headphone amplifier? - diyAudio
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Old 21st June 2010, 06:43 PM   #1
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Default Which Pass Aleph diy board for "no-cost-object" headphone amplifier?

Dear Pass Diy Forum,

I’m an Italian student who would like to use a Pass Aleph as amplification of my main listening system: reference headphones.

Very unpleased of commercial products (under 3000 Euro), I’ve already build some good sounding amplifiers; but now, with the “knowledge” headed up, I would like to build a “no-cost-object” class A headphone amplifier. (Something like Rudistor RP010 for example)

So I would like to ask You if one of the Aleph diy boards could be useful for that utilization (possibly with 20/30 watts on 8 ohm, 10 mV, able to drive headphone impedence from 32 to 300 ohms), or if I could look for something different, or if some modifications are necessary on the boards, power supplies voltage, ect., for an high-end result.

Thank You very much indeed in advancefor any suggestions or advices,

with kindest regards,


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Old 22nd June 2010, 02:43 PM   #2
eyoung is offline eyoung  United States
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You might consider to post this question to the Pass forum as may get a quicker more informed response..

Regards, Elwood
"Lead me not into temptation...I can find it myself."
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Old 22nd June 2010, 05:01 PM   #3
Nisbeth is online now Nisbeth  Denmark
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I trust you know this? HeadWize - Project: The Zen Headphone Amplifier by Marcello Pellerano

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Old 22nd June 2010, 07:51 PM   #4
adason is offline adason  United States
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hey hammerklavier, are you looking for "no-cost-object" that is the cheapest way possible...or "cost-no-object" that is the most expensive way possible?

which heaphone amplifiers under 3000 Euro have you tried and found very unpleasant?

what heaphones did you use?
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Old 22nd June 2010, 08:36 PM   #5
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Something like RP010
Don't take it the wrong way, but it doesn't take a genius to figure out the RP010(B) and it has the build characteristics of a DIY project.
It doesn't count how one deals with winning, but how to handle a loss (© DjT)
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Old 23rd June 2010, 01:53 AM   #6
Gordy is offline Gordy  United Kingdom
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Davide, hello,

There are many possible answers to your requirements.
First, start by answering the questions set by adason (above)... to get you on the right path...
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Old 23rd June 2010, 03:09 AM   #7
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Hi Hammerklavier,

I think that Pass Aleph series will be too much over power to drive your headphones. In fact I think the amp will just blow your headphones before you know it. A smaller version (lower bias current) Zen amp might be better for you.

Wachara C.
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Old 23rd June 2010, 07:43 AM   #8
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I thank sincerely to those who answer me (I didn't expected so many answers...). Thank You!

Now, I try to aswer to all the questions You made.

First of all: I would like to build a "no cost object" amplifier because, honestly, I would like to make a my own amplifier by myself (without selling intentions) with no-compromise choices (as far as my knowledge unfortunately allows), high quality parts, refined aspect and because (obvious) I pretend to listen many times better than my money can buy... (and I need to listen to music for long periods). That's all.

Second: I have now a powerful amplifier with 8 selected mosfets for channel (yes, I'm fool probably...), class A (10 watts for channel on 8 ohm), probably better than any head amplifier I could buy in the market, but I really need more "power width", because with AKG's reference series I feel clearly the "amplifier limit" and, more important, I can't reach any "realistic volumes" with instrumental music as normally done with 32 ohm headphones... (It's obvious that with a 32 ohms you can burn easily out the drivers in few minutes)

Third: that amplifier should need a 50volts transformer (now has a 40) for a power increase and whereas I have seen that Alephs need less current (and less wasting money in power transf.) I became concerned about Pass alephs and I would like to know more about them.

Thank You sincerely, see you soon.
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Old 23rd June 2010, 07:53 AM   #9
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Post Scriptum

It was clear that It had to have been "cost-no-object"...
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Old 23rd June 2010, 05:35 PM   #10
Gordy is offline Gordy  United Kingdom
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Originally Posted by Hammerklavier View Post

because with AKG's reference series
Which AKG?
K1000 ?
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