kenable RCA Phono Socket to Large 6.35mm 6.35 mm 1/4 inch Jack Adap...
RCA Plug to 1/4in (6.35mm) TS Mono Jack Adapter, Gold Plated – FlexRadio
Amazon.com: GLS Audio Store RCA to 1/4 TS Adapter - RCA Female to 1/4 Inch Male Mono TS Plug Adapter - All Metal Connectors with High Grip Treads - 4 Pack : Electronics
Amazon.com: CNCESS CESS-190 Guitar Plug Adapter Right Angle 1/4 Inch TS Female to 1/4 Inch TS Male, 6.35mm Mono Connector Metal Shielded, 2 Pack : Musical Instruments
Geekria Apollo 6.35mm Male to 3.5mm Female Stereo Audio Jack Adapter,
Amazon.com: NANYI 1/4 Inch Female to 1/8 Inch Male Stereo Headphone Adapter, Upgrade 6.35mm Jack Stereo Socket Female to 3.5mm Jack Stereo Plug Male for Headphone, Amp Adapte, Black 1-Pack : Electronics
RadioShack 1/4" Stereo Jack To 3.5mm Stereo Plug Adapter