Building a 7.1 Surround System from two speaker systems?

[pemfir]

I recently bought a Logitech 5500Z model (see link please)
http://reviews.logitech.com/7061/224/logitech-z-5500-digital-5-1-speaker-system-reviews/reviews.htm
to compliment my older Philips speakers (please see the link)
http://www.amazon.com/Philips-Multimedia-Speakers-2-1-System/dp/B001YKCE86/ref=pd_sim_sbs_pc_32
I want to get a 7.1 Surround System out of these 7 speakers. The Logitech speakers require three 3.5 mm audio jacks, the Philips speakers require one 3.5 mm audio jack.
will a sound card like this support all 7 speakers/four 3.5 mm jacks ?
http://www.newegg.com/Product/Product.aspx?Item=N82E16829102043

 

[User0one]

They should work as far as hooking up, but since your old pair has a sub woofer it might not sound great with the other 5.1 speakers

Surround Sound systems sound better if the speakers are Timbre Matched for tonal quality.

http://www.polkaudio.com/polk-university/technology/timbre-matching