I need help finding a cheap DAC or converter

[Ferather]

Right so you mean two speaker systems, not two speakers, I imagined a left and right speaker, not two systems. Now I understand the splitter. I will make some corrections.

So you are using a 3.5mm green out splitter for left-right on both X-240 and JBL, stay with that. The X-240 already has built in crossover for its LFE.
The extra added Klipsch R-12SW could in this case run from green (left-right), 3 way splitter, and use both white-red.
To get the orange out LFE channel on the sound card, you would need an extra 3.5mm to RCA.

The JBL unit will be the only unaffected unit in the green out situation, as there has not been any crossover filtering applied. You could ignore orange out.


Edit: If you choose the ignore orange out (LFE), set Windows to stereo full range. If there is a line-out from Klipsch R-12SW, plug JBL into that.

It would be easier to simply just add the R-12SW to green, and use the splitter. But he can also use orange out (to RCA), RCA is two mono ports, so he plugs in just white.
Using orange would seem like the right option, but then he needs to setup 5.1 and add software crossover to populate the LFE channel.

Using crossover prior to green out, will remove LFE frequencies from green out, effecting the X-240, which has built in crossover, which then wont work.

 

[physicsjunky]

Thanks for all the help and guidance. I should get the R-12SW in about a week so I'll just have to wait and set it up later.