Electronics > Projects, Designs, and Technical Stuff
DIY Headphone AMP, any ideas???
cterawskyj02:
Hey guys, this is my first post and i am wanting to build a headphone amp, more because i can than any other reason, my PC does OK.
But i am looking for ideas, or if any one has made one or seen a good post on how to make one. Let me know.
Psi:
My vote is this, because it's just so cool.
Guide showing exactly how it was made
https://www.instructables.com/id/Crystal-cMoy-Free-Form-Headphone-Amplifier/
cterawskyj02:
Thanks, this is really cool! I will probably do something along the lines of this.
I don't think i'll use resin as i am not that skilled.
nick_d:
I built something like this using an LM386. There are lots of circuits and tutorials available. This one looks really good (based on a quick skim read):
http://www.circuitbasics.com/build-a-great-sounding-audio-amplifier-with-bass-boost-from-the-lm386/
Mine was a bit special since I used two LM386s to create a bridged output and then trimmed the DC offset with a digital pot. Yours will be much more straightforward. Try building each circuit in the above tutorial, starting with the simplest then adding the extra parts once you get it working each time.
A word of warning: LM386 on Ebay or Aliexpress are fake. Always use Digikey or Mouser for development. Once you get all problems ironed out, you can safely evaluate the fakes in your circuit.
cheers, Nick
magic:
Nice and cool but better use good electrolytics 'cause there will be no replacing them :-DD
LM386 isn't great fit for headphones. Too much gain and crap specs even if you get a genuine one.
The (in)famous O2 amp gets better performance from two paralleled halves of an NJM4556A. Other high current opamps often seen in HP outputs are RC4580/NJM4580.
Not sure how NE5532 or LM4562 would perform. Lower output current but technically better opamps, may possibly maintain reasonable distortion even close to their current limit. If they don't run out of output current, that is.
I think there are also some high current options in the LME49xxx and OPA16xx lines, but pricey.
IMO a CMoy or some variation thereof (like the O2) is the way to go.
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