The ideal solution would be to swap out the entire cable for a longer
one unless you have to...
It sounds like this isn't an option, so your next best choice is to
get some extension speaker cable and cable crimp-on connectors or Wire cable connector blocks (see ebay URL with picture below ) from the
wiring department at Radio Shack, Home Depot or your local
hardware store. The crimp connectors are generally rubber shielded metal
tubes that you insert the wires from the speaker and the extension
speaker wire. You then squeeze the crimp-on connector with pliers to
secure the wires in place.
IMPORTANT...During extension make sure the polarity (+ -) marekd with different color will continue from existing speaker cable.Otherwise you will loose the LOW NOTES -BASS
If you don't have any extra speaker wire on hand, you can pick some up
at a reasonable price at Radio Shack or any hardware store. While there
are many theories about what gauge speaker cable are best, you're likely
starting with fairly thin wire coming from the back of the RCA home
theater system, so crimping on a heavy gauge wire will do little to
improve your signal quality.
18-guage speaker wire
will likely do the trick in most cases. I would likely recommend a
different solution if this were a component-based system with
individually powered amps, but for an all-in-one system, 18-guage wire
will be sufficient.
Crimp-on **** connectors
come in a variety of sizes. Make sure the size you choose is
appropriate for the wire you use to extend the length of your speaker
cabling run. Here again, Radio Shack and the local hardware stores will
sell the connectors you need for most of the common wire gauges.
Hope this helps! Take care and please Remember to rate/vote and give me
4 Thumbs Up for me to continue for Helping out the Community :)
Thankshttp://cgi.ebay.co.uk/SPEAKER-WIRE-CABLE-CONNECTOR-BLOCKS-EXTENSION-/280672581841