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Headphone amplifier with Analog Devices OP213

post #1 of 4
9/21/10 at 1:22pm
Thread Starter 

Hello,

 

First, I want to explain what I want to do. I bought a new sound card for home recording (guitar mostly). The problem is it can't drive headphones directly so I decided to build a headphone amplifier which was actually planned many years ago for home recording but now it's a must.

 

I've been searching schematics to get some interesting ideas about headphone amps. I stumbled upon that CHA47 threads but couldn't find the schematic. I need to check this one too if there is evil genius parts in the schematic, but no luck. I wonder if there is a restriction about it.

 

Second, I have some opamps lying around. Especially, I want to make the amp with one of the OP213s I have. I did some protoboard experiments before with those opamps and the results were pretty damn good. Those opamps can work with single supply (my experiments were single supplied). In the datasheet, even an application note indicates such operation (multimedia application, very simple headphone amp. diagram). Do you still recommend dual supply operation ? Also any tips with those opamps?

 

Thanks for the replies in advance...

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post #2 of 4
9/22/10 at 3:26pm

Hello,

 

I have never used this opamp before so you may want to disregard this post on that strength :)

 

May I suggest that instead of using that opamp, you go for a cheap but well tried and tested amplifier? Such as the A47? It just seems like a shame because the OP213 doesn't look like it would fit your quality build.

 

That said, if you have had great results from a prototype - run with it! What didn't you like about the performance of your prototype that you were hoping to remedy with the CHA47 or something similar?

 

What kind of headphones do you want to drive?

 

I'd be interested to see if you run with the OP213 as the part count would be tiny...!! And if it sounds good, brilliant! :D

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post #3 of 4
9/22/10 at 3:43pm

Here is the Apheard 47 build thread.

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post #4 of 4
9/22/10 at 3:49pm
Quote:
Originally Posted by Avro_Arrow View Post

Here is the Apheard 47 build thread.


Sorry I should have linked! Thank you Avro_Arrow :)

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