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New PassDIY Headphone Amp (Coming Soon)
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Old 19th March 2015, 09:08 PM   #21
Michael Rothacher is offline Michael Rothacher  United States
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Aw, snap. Where's my wallet?
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Old 19th March 2015, 09:40 PM   #22
6L6 is offline 6L6  United States
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Quote:
Originally Posted by MASantos View Post
Ok, but designing a discrete amplifier from the ground up is different from throwing a discrete opamp in a design.
Very true! (Although those who make the discrete opamps would likely disagree...)

This circuit was designed with an IC Opamp.



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Originally Posted by blizzardbuffalo View Post
Is it designed in such a way that it can be built with a balanced in/out option?
No. It's unbalanced the whole way through the signal path.
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Old 19th March 2015, 10:28 PM   #23
MASantos is offline MASantos  Portugal
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I've used and heard IC input stages before and they can sound quite good! I'm sure Wayne did a good job and I might just build it as I need a second HP amp. It would be nice too as a preamp for the ACA! Nice PASSDIY desktop system!
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Old 19th March 2015, 10:56 PM   #24
blizzardbuffalo is offline blizzardbuffalo  Australia
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Originally Posted by 6L6 View Post
No. It's unbalanced the whole way through the signal path.
Cheers!
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Old 20th March 2015, 03:42 AM   #25
ammel68 is offline ammel68  United States
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Hmmm...I'm a little confused.
Is this amplifier Wayne's design, Jam Somasundram's design or a combined effort of both?
I've never heard of Mr. Somasundram before. Looks like he was with Cary Audio a couple of years ago.

This article states that Jam is "the engineering brains behind Pass Labs' forthcoming headphone amplifier".
Pass Labs debut INT-60 integrated, headphone amp at CES 2015 | DAR
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Old 20th March 2015, 04:10 AM   #26
6L6 is offline 6L6  United States
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Wayne's.

This has little in common with the Pass Labs offering. That's a significantly more complicated design, and wouldn't make a good DIY project.
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Old 20th March 2015, 05:10 AM   #27
ammel68 is offline ammel68  United States
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So the $3500 amplifier is a totally different amplifier than the one you're presenting here?
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Old 20th March 2015, 07:16 AM   #28
Zen Mod is online now Zen Mod  Serbia
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Quote:
Originally Posted by 6L6 View Post
...... and wouldn't make a good DIY project.
sounds like something from Yellow pages team briefing

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Old 20th March 2015, 08:04 AM   #29
MASantos is offline MASantos  Portugal
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Quote:
Originally Posted by ammel68 View Post
So the $3500 amplifier is a totally different amplifier than the one you're presenting here?
Yes, I would suspect that the PASS LABS HP amp has much better power supply regulation and probably a discrete circuit from input to output.

Possibly moar power too!

This DIY version looks to have been designed to provide great sound whilst being quite easy to build (no need for bias adjustment, all in one board).
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Old 20th March 2015, 11:49 AM   #30
juma is offline juma  Germany
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6L6, I don't want to be in your shoes - advertising OpAmp + source follower as a "new headamp", you'll need a top marketing pro to get you out of that one...
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