Ok so I have no idea if this is even possible but here is what I want to attempt to do. I currently have the Logitech Z523 2.1 speaker system and today I found two speakers from Magnavox, and yes I know they are probably junk, but if I can try to use them in conjunction with my current Logitechs, that would be fine. The Magnavox's really do not have an extensive amount of info on them, but I can tell you they are each 4 Ohms and both have a S/N of E0402407. The wires for the speakers are regular speaker wire. I use the on board sound card that came with my motherboard which is the ASUS M4A785-M. The Logitechs are connected using the 3.5mm jack and I would like to try to attach the Magnavox's to the Logitechs so I can control their volume with the knob on the Z523's. If not possible, is there still a way to hook them up to my computer as an addition to my current speakers? Do I need an amp? How do I connect speaker wire to 3.5mm jack? Thanks in advance.