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Putting a 1/4in Stereo Jack into a computer :)

I'm thinking this will be my first instructable. I plan to put a 1/4 in stereo jack in the front panel of my PC. I can do that. The problem is, I need to figure out a way to amplify the sound, since my 30-year old earmuffs use a 1/4 inch jack and suffer from low power. I'm thinking USB power. Any suggestions? I know comps, I know how to do this, I just know nothing about amps :)

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LasVegas10 years ago
Your audio card's Speaker Out port is designed to drive 2 8Ω speakers directly and should need no amplification. You would need to add an amplifier if you decide to drive the headset with the Line Out port. If you want quality sound, try pulling one out of an old set of amplified computer speakers.
mikesty (author)  LasVegas10 years ago
I use onboard sound, thus only a Line Out. I was planning to use FP-AUDIO or more likely the aux. audio on the mobo usually used for CD drives.
LasVegas mikesty10 years ago
The AUX and CD ports on the motherboard are input ports. The only output would be the audio out (LINE on yours I guess) at the back of the computer and the speaker port. The problem with the later, is that it's usually just a D/A output following the original PC design (play's a tone).
mikesty (author)  LasVegas10 years ago
I have no idea why I said AUX-AUDIO as output... that was one of the dumbest things I've ever said. I totally meant FP-AUDIO header. It's funny, I've actually got onboard 5.1 I suppose. Mic, Line In, then Line Out, and then center, front pair, rear pair ETC. I've had trouble with those though. FP should work just fine. How to amplify it though? I probably have an old pair of speakers somewhere, powered, but missing the AC adapter. I suppose that might do.
LasVegas mikesty10 years ago
If you don't have the power adapter, it shouldn't be to hard to adapt the power source from within your computer itself. If the amplifier requires 5 or 12 volts, you can pull either right off of a floppy or HD power cable. If it requires a different source, a very simple circuit can be created to produce another voltage. Those amps don't require hardly any current, so the circuit would be easy.
mikesty (author)  mikesty10 years ago
Ah, I said AUX in because I was thinking of building an input at some point in the future in case I pick up guitar ;) THINKING WAY AHEAD!
Doh! Its got to be new headphones. ... . Unless you really want to rewire your old ones. If you got 5.1 sound you already have amp on board. If you just looking to amplify your headset, Then rewire to usb. Simple on the wiring loom but fiddly little job. Rather you than me. Course you could cut the plug and rewire 10mil. jack.