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Extending a headphone jack from a decased PC Speaker amp?
phantompower:
--- Quote from: Zebidee on September 06, 2007, 08:17:00 am ---hiya Artifact,
What you really need to do is buy a new phono jack and wire it into the SPEAKER OUTPUT from your PC.
ie, the sound signal travels from PC -> jack -> amplifier
All jacks are different I guess, but they usually work by:
1) breaking the GROUND contact while simultaneously ...
2) redirecting the ground contact to the headphone plug.
This is how they turn off two stereo channels (or more) at once - sometimes it just requires testing your new jack with a plug and multimeter to work out which is the ground etc, and getting your head around it. The left/right channels are probably just pass-through, but can't be sure in all cases.
What this means is, if you put your headphone jack onto the PC output line and, so long as it provides for breaking the ground contact, you won't get sound output from your amplifier after you plug your headphones in.
So don't de-solder the old plug from your PC amp, just buy a new one from RS for a couple of $$. It'll be neater and easier to mount as well.
Oh, what the heck it looks like you hve been having fun hacking away anyway :)
--- End quote ---
Is it possible to achieve the same result with a splitter cable plugged into the speaker out on the PC sound card? What I am wondering is if you have a Y cable where one side runs to a headphone jack you extend to the front of the cab and the other goes to the amp of the speakers.
My hope is that, unless the headphones are plugged into the outside jack, the sound will travel through the amp/speakers. When the headphones are plugged into the jack, the sound will not come out the speakers.
Is this possible?
bkenobi:
A simple Y cable will not keep sound from going to the speakers.
I didn't see this thread back when it came out, but I would probably opt for a switch (button or rocker style) next to the jack that will switch the audio from headphones to speakers. Then I would just use an extension cable coming out from under the CP. But, that's just me.
Zebidee:
--- Quote from: phantompower on June 28, 2009, 03:04:13 am ---
--- Quote from: Zebidee on September 06, 2007, 08:17:00 am ---hiya Artifact,
What you really need to do is buy a new phono jack and wire it into the SPEAKER OUTPUT from your PC.
ie, the sound signal travels from PC -> jack -> amplifier
All jacks are different I guess, but they usually work by:
1) breaking the GROUND contact while simultaneously ...
2) redirecting the ground contact to the headphone plug.
This is how they turn off two stereo channels (or more) at once - sometimes it just requires testing your new jack with a plug and multimeter to work out which is the ground etc, and getting your head around it. The left/right channels are probably just pass-through, but can't be sure in all cases.
What this means is, if you put your headphone jack onto the PC output line and, so long as it provides for breaking the ground contact, you won't get sound output from your amplifier after you plug your headphones in.
So don't de-solder the old plug from your PC amp, just buy a new one from RS for a couple of $$. It'll be neater and easier to mount as well.
Oh, what the heck it looks like you hve been having fun hacking away anyway :)
--- End quote ---
Is it possible to achieve the same result with a splitter cable plugged into the speaker out on the PC sound card? What I am wondering is if you have a Y cable where one side runs to a headphone jack you extend to the front of the cab and the other goes to the amp of the speakers.
My hope is that, unless the headphones are plugged into the outside jack, the sound will travel through the amp/speakers. When the headphones are plugged into the jack, the sound will not come out the speakers.
Is this possible?
--- End quote ---
In short, no. Because your speakers will still be grounded and will still want to suck more power (ie audio signal) than your headphones. You'll also might have problems with mis-matching impedance and extra interference from having extra cabling and two output devices connected.
Just wire is PC -> JACK -> amplifier and everything should be sweet (and in stereo as well), so long as you wire it in correctly. It really is the simpler way.