Amazon.com: tisino RCA to 1/4 Adapter, Gold Plated Pure Copper RCA Female to Quarter Inch Jack TS Mono Adapter Audio Connector - Multicolor 2 Pack : Electronics
Amazon.com: C2G 40637 3.5mm Stereo Male to RCA Mono Female Audio Adapter, TAA Compliant, Silver Metallic Silver : Electronics
6 RCA Mono to Stereo Cable RCA F to Dual RCA Males | Computer Cable Store
Amazon.com: SPRODIO Single Stereo to Mono Converter, RCA L/R Audio Adapter Stereo to Mono summing Cable Adapter SC21 : Musical Instruments
RCA Female to 1/4 inch Phono/Mono Adapter
5 Pack 2x RCA Stereo Converter to 3.5mm Mono by Keple, Audio Adapter, Y Splitter, 3.5mm One Ring Male Jack Plug to 2 x RCA Phono Female Connection | Keple.com
RCA Mono Male RCA to Two Female Stereo Adapter Y Cable - 6" - EACH - Dedicated Audio
1/4" MALE TRS 6.5mm Stereo Jack to 2x RCA FEMALE Mono Adapter Splitter | eBay
Y Adapter - Stereo 1/8 TRS Plug to L/R mono RCA 20-Foot Black Cable - Willis Music Store
Kentek 3.5mm AUX male to RCA mono female adapter connector auxiliary stereo audio M/F - Walmart.com