Can I turn the Logitech z-2300 to a 4.1 speaker system?

I don't know which would be best but my recommendation to you is go shop around on the internet or in stores and find some good quality 2.0 (2 speakers without a subwoofer) computer speakers. If the speakers don't already have RCA connections it is easy to find a 3.5mm to RCA cable connector. Let me know if you want me to clarify that....audio lingo is very confusing sometimes!

ahh logitech always the sub that goes. its buggered but dont toss out the whole speaker set just buy another one and youl have spare speakers when you need them

mine did the same thing today , i just bought these new 2 weeks ago . the black prong speaker works in both ports ..
the yellow prong speaker is the one with the malfunction .
it works sometimes but when i turn up the volume louder it dies out .

Hi have you tried adjusting the bass on the Subwoofer , and/or The Eqauliser on your PC....
Hope this helps bud
Happy new year

its a problem with the speaker, if you could possibly change out the wire, I would suggest that cause there could be a break in the speaker.

If you can't do that then the speaker needs to be replaced.

You may want to purchase a good audio card for you Z-2300 to unleash it's magnificent driver features. Since its a 2.1 channel speaker, there are a lot of cheap but quality audio cards that is available for it.

The manual is here:

http://www.logitech.com/pub/pdf/speakers/zcinema_amr.pdf
Have a nice day!

Make sure you you have turned on both of the power buttons the one on the remote should be pushed down and there is also one on the back of the subwoofer just above the power cord connection. Hope that helps if not just let me know

Is this what you were looking for? You might need additional cable to connect it to your tv depending on what plug you have. Hope it helps!

http://logitech-en-amr.custhelp.com/cgi-bin/logitech_en_amr.cfg/php/enduser/fattach_get.php?p_sid=A998z6gj&p_li=&p_accessibility=0&p_redirect=&p_tbl=9&p_id=2925&p_created=1126108083&p_olh=0

sounds like a loose connection somewhere inside that particular speaker. You could open it up to check for a loose or separated solder joint. The safe option would be to return to place of purchase and exchange for a new set.