Recently I built a PC and I've been using my laptop as a desktop replacement this whole time, so my 5.1 speaker setup was plugged into the headphone jack of my laptop. With the new PC in the mix, I bought a 2 male to 1 female splitter so I could use the speakers to listen to audio coming from both the PC and Laptop. but I hit a weird bump, as soon as I plug in the Laptop after setting up the PC with the splitter attached to the speaker's audio input, my audio on both decreases by nearly half. I was thinking this was a power issue, but the speakers are self powered, they're plugged into their own power outlet. my next plan was to buy a USB soundcard for my laptop to see if this will remedy my problem, but I'd rather ask than waste gas and $20-$30. Thank you.