171Views4Replies

Author Options:

Need help with modify headphone amp schematic? Answered

Picture of

I need help with remove the op-amp part of the headphone amp .I have  another gainstage ,so i only need the transistor part.Can i modify the schematic like the image bellow ???
Thanks in advance!
Sorry for my bad English!

4 Replies

user
steveastroukBest Answer (author)2012-12-27

The opamp adds feedback to the design, you need to design THAT into the whole thing, if you insist on getting rid of it.

What's wrong with having the opamp ?

Select as Best AnswerUndo Best Answer

user
login721 (author)steveastrouk2012-12-28

I have opamps and gain stage before it.But the signal is not strong enough to load a pair of headphone.And i dont have space to add booth the opamp ans transistor part.

Select as Best AnswerUndo Best Answer

user
steveastrouk (author)login7212012-12-28

Once again, show YOUR circuit. I'd add the transistors as a final power stage around the final amp. An LM386 would be smaller than your transistors....

Select as Best AnswerUndo Best Answer

user
login721 (author)steveastrouk2012-12-28

Thanks, this is my schematic.
Preamp -> [clean/od] -> EQ -> Cabinet Simulator

http://i247.photobucket.com/albums/gg132/chipmapple/Preamp_zpsbd9da239.jpg
http://i247.photobucket.com/albums/gg132/chipmapple/Cleanch_zps6ff827e7.jpg
http://i247.photobucket.com/albums/gg132/chipmapple/ODch_zpsaa5d8be6.jpg
http://i247.photobucket.com/albums/gg132/chipmapple/EQ_zps3e908376.jpg
http://i247.photobucket.com/albums/gg132/chipmapple/Cabsim_zpsecd007ae.jpg

Select as Best AnswerUndo Best Answer