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Headphone stereo amplifier

 
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Alexander125
HG Master


Joined: 13 Jan 2009
Posts: 105
Location: Galati, Romania
PostPosted: Sat May 16, 2009 11:49 am    Post subject: Headphone stereo amplifier Reply with quote
My latest creation.
Made myself a High-Power, High-Fidelity, dirt cheap headphone amplifier.
I spent about 6 dollars on parts and it has power and fidelity.
Super cool noise reduction.
Here are some pics:
http://i713.photobucket.com/albums/ww132/Alexander200/DSC01454.jpg
http://i713.photobucket.com/albums/ww132/Alexander200/DSC01455.jpg
http://i713.photobucket.com/albums/ww132/Alexander200/DSC01456.jpg
http://i713.photobucket.com/albums/ww132/Alexander200/DSC01457.jpg
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JingleJoe
HG Supreme


Joined: 01 Apr 2009
Posts: 52
Location: England
PostPosted: Sat May 16, 2009 7:20 pm    Post subject: Reply with quote
It kinda looks like you made it from bits of an existing circuit? Or from a kit perhaps?
Either way it's pretty good but I was hoping for a circuit diagram and a ramshackle, cobbled together, free-formed circuit Laughing
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Alexander125
HG Master


Joined: 13 Jan 2009
Posts: 105
Location: Galati, Romania
PostPosted: Sun May 17, 2009 4:14 am    Post subject: Reply with quote
It's actually made out of an old set of speakers with some tweaked components like a couple of caps and resistors.
I'm using a stereo 324OP-AMP, powered( for now ) by a big, bulky SLA that weyghs 2-3 lbs.
The fltering circuit doesn't work so well because it's 6-V istead of nine but I'm going to swapp it.
I'll draw a complete diagram and instructions to make your own.
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JingleJoe
HG Supreme


Joined: 01 Apr 2009
Posts: 52
Location: England
PostPosted: Mon May 18, 2009 6:54 am    Post subject: Reply with quote
Alexander125 wrote:

I'll draw a complete diagram and instructions to make your own.

Success! Thankyou Very Happy
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Alan
Site Admin


Joined: 29 Jan 2006
Posts: 1399
Location: Winnipeg, MB
PostPosted: Tue May 19, 2009 5:35 pm    Post subject: Reply with quote
Looks good. Nice idea in using an existing circuit board. Smile
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Alexander125
HG Master


Joined: 13 Jan 2009
Posts: 105
Location: Galati, Romania
PostPosted: Wed May 20, 2009 12:44 pm    Post subject: Reply with quote
finally have I done something usefull for my MP4.
gotto replace that SLA.
oh
and the schematics I used were from the Altoids Can headphone amplifier.
though, it has a hard time filtering the horrible signal noise coming from that digital MP4.
Damn it.
I hate solid state digital audio devices, coz at high volume it produces static.
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