Here is what you did.
Here is what you need to do for the Xbox AND/OR the PC.
If your combining the signals....there is a chance they could combine to make one "big" signal that could DAMAGE your amp
if the volume is MORE THAN HALF WAY UP
on either the Xbox or the PC . There is other bad things that could happen too. I would advise only turning on one signal at a time. If you want to try both, keep the volume turned down very low on both the PC and the Xbox...then use the amp to increase the volume. Don't say i didn't warn you.
1.) You have x3 signals,...left channel, right channel, and ground.
You want to switch left and right channel on/off at the same time for BOTH the Xbox and the PC....unless you want mono sound.
You want to leave the ground for your Xbox, your PC, and Amp ALWAYS connected at all times. Please don't put a switch on ground. That can cause all sorts of bad things to happen.
2.) You actually made more work for yourself. You bought SPDP switches, which is a terrible idea if you want stereo sound. Buy DPDT switches. Any local radio shack will have them for like $1.00. This will allow you to switch both the left and right channel at the same time.
3.) If you can't afford or are too lazy to get a lower wattage soldering iron,......get the smallest and longest tip for it that you can. (some cheap soldering irons won't allow you to change the tip, but most will). A high wattage soldering iron with a long, tiny tip will run relatively cool.
Also..fyi...On the schematic, the "X" means "Don't connect"
Also..fyi...If your confused about which pin is left, right, and ground....read this --> http://en.wikipedia.org/wiki/TRS_connector
It's wikipedia, so it's an easy read.
Unless your using all gold plated audio jacks and gold plated audio connectors, you are adding some extra resistance which will make it "slightly" quieter. Extra resistance from solder joints themselves isn't going to be problem. If it the sound is barely audible (and everything is grounded correctly), it's not a electrical problem but a mechanical problem. Chances are you damaged the plastic in the jacks with the heat from your soldering iron.Edited by crimsontears809739 - 3/16/12 at 10:54am