1/4 Mono Jack to 3.5mm Mono Jack Adapter - Audio Adapters - Interseries Adapters - Connectors & Adapters
RCA Plug to 1/4in (6.35mm) TS Mono Jack Adapter, Gold Plated – FlexRadio
Amazon.com: MillSO 1/4 to 3.5mm Headphone Adapter TRS 6.35mm 1/4 Male to 3.5mm 1/8 Female Stereo Jack Audio Adapter for Amplifiers, Guitar, Keyboard Piano, Home Theater, Mixing Console, Headphones - 12inch/30CM : Electronics
Padcaster 1/4" Headphone Adapter PCHPJ01 B&H Photo Video
Parts Express 1/4" Stereo Jack To 3.5mm Stereo Plug Adapter
1/4 in TRS to Right-angle 3.5 mm TRS - Headphone Adapter | Hosa Cables
Amazon.com: 6.3mm 1/4" Male Plug to 3.5mm 1/8" Female Jack Stereo Headphone Audio Adapter (Pack of 10) : Electronics
Hosa Technology 3.5mm TRS to 1/4" TRS Headphone Adapter GHP-105
Amazon.com: VCE 6.35mm (1/4 inch) Male to 3.5mm (1/8 inch) Female Stereo Audio Jack Adapter for Aux Cable, Guitar Amplifier, Headphone, 2 Pack : Electronics