Connect USB PC speakers to Motherboard

[windowstoned]

Hello! I'm using an old Sony SDS-GD50iP speaker system for my PC. It is connected via USB, but I'd like to connect it directly to my motherboard (pink, blue, green audio ports).

The hub that the speakers and sub plug into has a LINE IN port on the back. What cable do I need to connect from LINE IN to the audio ports on the back of my PC?

Here is a review/photo of the speaker system for some familiarity! (And a photo of the rear of the hub!)

http://www.hardwarezone.com.sg/review-sony-srs-gd50ip-21-pc-speaker-system-have-dock-will-travel/sony-srs-gd50ip-pc-speaker-system

Thank you!

 

[Paperdoc]

Yes, this can be done easily. What you'll get, of course, is what is called "2.1 channel" sound. That is, you'll get left and right front speaker signals on the two small speakers plus bass sounds from the subwoofer. This is not exactly 2.1 sound, because in a full multi-channel system the subwoofer signal is separated at the source amplifier and sent out on a separate line. What this system will do is take a normal 2-channel (left and right stereo channels only) signal set from your computer's rear "Front Speaker" jack and then on its own will separate out the low frequencies and send them through its own amplifier to its subwoofer, giving you much better bass than the two small speakers alone could do.

To do this you need only one simple cable. It is called a "3.5 mm stereo cable" and it has the same connector on both ends. The connector has what's called a "tip/ring/sleeve" construction.
The tip and ring parts are the contacts for the left and right audio channel signals, and the sleeve part is the common Ground for those two channels. Use this to plug into the "Line In" connector on the back of the Sony control box, and to the Line Out for Front Speakers on your computer back panel (VERY likely green colour). Within your computer's audio system options if there are some, set it to output 2-channel stereo sound for front speakers, or, if that's not an option, set it to output stereo headphone sound on the Line Out jack. On your Sony box, use the "Input" button to choose the Line In input, and adjust your bass to what you like using the "Bass" button.

 

[Paperdoc]

Thanks for Best Solution.