Grado offers a Y adapter cable that lets you and your friend listen to the same audio source via your amplifier’s headphone jack or receiver. The cable has a 1/4-inch (6.3mm) plug to twin 1/4-inch (6.3mm) jacks. There is elimination of any added leverage on the output circuit board of the source. Thanks to the 8 inches (20cm) of the Grado Y adapter cable, between the plug and jacks. The replacement Grado Y adapter cable is built of the same high quality wire as their headphone cable. While using their Y adapter cable, Grado promises no dilapidation of sonic quality with this wonderful Grado headphone. Not only do you get the Grado Y cable for a great price, but it also comes with a one year warranty.