I use common HOME DEPOT #14 AC SOLID COPPER, plastic insulated, HOUSE WIRE (15 cents/foot) for my RCA interconnects. I run a SINGLE WIRE from preamp to amp without any shielding. The amp and pre-amp are then grounded together with common standed wire. I strip back about 1 1/2 inches from each end of this wire and then bend back (180 degrees) about 3/4 inch, then I tightly crimp the folded wire. This forms a perfect center RCA pin to insert into the RCA jack. ALSO #12 GAUGE colid core HOME DEPOT AC house wire makes FANTASTIC/IDEAL speaker wire. ONE WORD OF CAUTION: the single wire RCA #14 interconnect has DIRECTIVITY, so you must test the sound quality in one direction and then reverse the wire to find out which is the best direction ( this effect is likely due to the way the wire was maufactured, a larger guage wire is passed thru a machine die while being pulled in one direction)
