SUM-QSPP | Stereo to Mono Summing Cable 1/8" Male TRS to 1/4" Male TS
Rock n Roll Rentals - Stereo Male 1/8" AUX to 2x Mono TS 1/4" Male Y Cable (A206MPY)
Amazon.com: 1/4 Inch Mono Patch Cable, 10 feet 1/4" Mono Male to 1/4" Mono Male Cord for Electric Instruments (Guitar, Keyboard, Amplifier, Speakers, Synthesizers), CableWholesale : Electronics