The growing popular use of CAT (category five) twisted-pair data cables in audio applications has created a need for adaptors that will facilitate using that popular cable type for connecting amplifiers, speakers etc. These adaptors are wired to provide a twisted pair for each (left and right) stereo signal. Connectors have on one end an RJ-45 female jack, the CAT5 twisted-pair standard, and standard audio connectors on the other ends. The left channel is fed to pins 1 & 3 and the right channel is on pair 6 & 2 of the RJ-45 connector. This popular application is often suggested as a method of reducing electromagnetic interference to susceptible audio systems, particularly when the cable lengths will be more than a few feet in length.