New PassDIY Headphone Amp (now available)

[6L6]

Will these be huge changes compared to the first boards Wayne sold. Will your build be based on the new board.

Yes, of course it will be on the new PCB. I'll have an official guide with new photography.

 

[Frazzled]

I want in on this when it happens. Tired of the mostly lousy overpriced headphone amps that are for sale. This will be awesome.

 

[6L6]

Glad to have you on board! There should be some progress very soon, I'm supposed to get a batch of opamps to try today.

As for overpriced and lousy and the antidote thereof, the Schiit Magni 3 is, by all accounts, absolutely mindblowingly fantastic. And $99.

 

[delecoy]

I love my Schiit Modi Multibit. Had an original Modi that was great too. Buying a Fulla 2 next, for multi-purpose duty.

I also already have parts squirreled away for one of these headphone amps, when the boards come out

 

[wayne]

Will these be huge changes compared to the first boards Wayne sold. Will your build be based on the new board. Still populating mine one resistor at a time unless the wife says otherwise.

The only thing added is the resistance in series with the pot and all boards had that the very first schematic didn’t.

 

[Frazzled]

Is the a BOM available, I'd like to start picking up parts as soon as possible so when the boards are ready so will I.

 

[chiily]

Is the a BOM available, I'd like to start picking up parts as soon as possible so when the boards are ready so will I.

Same for me please. Oh and the dimensions of the PCB so I can spend ages finding the right case and knobs.... [emoji16][emoji16]

 

[6L6]

Update - The final configuration should be posted soon. The current PCB is fine, there will be a few tweaks to the schematic.

Documentation will contain the BOM.

The ball is rolling on getting the PCB into the diyAudio store, but this is never a fast process.

The best bit of news is the one I made with jellybean parts is fantastic sounding! Using a $0.50 ON Semi LM833 opamp and IRF 610/9610 outputs.

 

[Zen Mod]

Wayne more than succeeded in giving Swiss Knife to Greedy Boyz

 

[6L6]

Yes, I agree.

This was always going to be a project suitable for a wide range of builders, and having a solid PCB and configuration to ensure success has been important. I think we've finally gotten there.

 

[barrows]

Thanks!

Yes, I agree.

This was always going to be a project suitable for a wide range of builders, and having a solid PCB and configuration to ensure success has been important. I think we've finally gotten there.

To Wayne, 6L6, and diyaudio! I look forward to building this when the final boards, BOM are available.
Looks like a donation to DIYaudio is also in order.

 

[6L6]

This is the new board with a build using no exotic parts. It sounds absolutely wonderful! (In this example my favorite has been a $0.50 OnSemi LM833 and IRF610/9610 output mosfet.)

The official guide is in-progress. PCB will be in the diyAudio store in the not-distant future.

 

[EUVL]

> It sounds absolutely wonderful!

So no need to spend USD 3500 for a Pass Labs HPA1 ?




Cheers,
Patrick

 

[Zen Mod]

next time use some welding cables for signal route

 

[meldano]

> It sounds absolutely wonderful!

So no need to spend USD 3500 for a Pass Labs HPA1 ?




Cheers,
Patrick

Please compare ;-)

Google-Ergebnis fur https://www.stereophile.com/images/616passlabs.inside.jpg

 

[Frazzled]

I'm serious, I really am looking forward to this, it's been a long time since I took on a cool project and this is perfect timing for me as I just got a fantastic headphone that I'm looking forward to listening to.

 

[bczupa]

A build of mine. No CNC finish on the case yet, maybe later ...

The most dificult were the the output transistors 2SK2013/2SJ313 - matched quad (2N,2P) was bought form liubincalvin forum user.

Plays nicely, however, the default gain setting is a bit low my taste (Senheisers HD600 needs more)

 

[Zen Mod]

and , worst thing is that you don't need any matching with this circuit

 

[bczupa]

and , worst thing is that you don't need any matching with this circuit

Yes, I agree, optocoulpler bias regulation works like a charm.

Nevertheless, 2SK2013/2SJ313 available on the market are just fakes. You better use FQP3N30 / FQP3P20 instead ... or just buy from a trusted source, were matched transistors are also available

 

[vvs07]

This is the new board with a build using no exotic parts. It sounds absolutely wonderful!

Jim, I don't know whether this is the right place to ask - how did you cut the rectangular hole in aluminum for power entry module?

Thank you!