I'm trying to get the audio feed from a PC and a DVD player into one set of speakers without having to buy £60 dual-input speakers. So, I bought the necessary converter cables, BUT... the sound from either of the devices is almost inaudible while both other are connected, but fine if they are on their own. I have other 2-into-1 PC audio adapters which work fine, so I'm wondering if the problem is my RCA-to-3.5mini converter.
Other than giving up and buying the £60 speakers, has anyone got any suggestions? Might I have more luck if I bought speakers with RCA inputs on them and converted the PC signal than the other way around? Whatever solution I find will need to be done to quite a few computers, so needs to be as cheap as possible.