RCA input Headphone Amp, Any Exist?

[Moko]

Hi I'm looking to build a headphone amp to use with the line out from a passive pre amp connected to a set of valve mono blocks so need RCA inputs and a traditional 1/4 headphone socket. I don't need a DAC or USB or anything too complicated just a good sounding headphone amp.

Headphone to be used Beyerdynamic DT 770 80ohm

I have built a few electronic kits so am reasonably skilled but obviously the simpler the better in this case as money is tight on this project so what would you guys suggest I build?

Thanks in advance for any suggestions/advice etc.

 

[Mooly]

An O2 is well thought out,
http://www.diyaudio.com/forums/headphone-systems/193977-objective2-o2-headphone-amp-diy-project.html

 

[Moko]

Thanks I looked at that one but as the thread is so old I wasn't sure if you could still buy the PCB, any ideas of where to get one?

 

[billshurv]

I have a board and some of the components you can have for the cost of postage if that's of interest.

 

[Mooly]

I've no idea tbh. Why not ask in the thread where the latest to build it got their boards from.

 

[Mooly]

There you go ^ 🙂 That's a great offer.

 

[Moko]

That's most kind I will pm you....Thanks so much that's what's so great about the DIY scene.

 

[agdr]

Just for reference, if someone should pull this thread up in a search, the usual suspects for selling O2 headamps are:


Epihany Acoustics in the UK (their EHP-O2 is just an O2)

EHP-O2 Award Winning Portable Headphone Amplifier | Epiphany Acoustics


Head n' HiFi in Switzerland

Objective2 (O2) Headphone Amplifier
http://www.diyaudio.com/forums/head-n-hifi-walter/


JDS labs here in the US

https://www.jdslabs.com/products/35/objective2-headphone-amplifier/


Mayflower here in the US

https://www.mayflowerelectronics.co...iers/standard-objective2-headphone-amplifier/


...and Audio Poutine in Canada, but I'm not sure if he is still active

https://www.facebook.com/AudioPoutine/
http://www.diyaudio.com/forums/audio-poutine/


Most or all of these guys offer bare boards, kits, cases, ODACs, as well as assembled units. Many have a version with RCA jacks in the back.

With the exception of JDS I'm actually not sure how active *any* of these guys are now, best to check first. All of these folks were there from the first days back in 2011 selling O2s.