3.5mm Mono Right Angle, 1/8" Mono Male to Mono Female 90 Degree Adapter Connector Plug for 3.5mm Mono Audio Extension Cable (2-Pack)
3.5mm Mono Plug to RCA Jack Adapter — Tera Grand
InLine® Audio Adapter 6.3mm jack male mono to 2x RCA female | Jack -> RCA | Adapter / Converter | Product Overview | INTOS ELECTRONIC AG - Online Store
Learn more about audio adapters on the Teufel Audio blog
Sennheiser Adapter Jack 3.5mm to RCA -CINCH For TV Listening System 549352 615104317338 | eBay
RCA to 1/4 TRS Adapter - General Adapters | Hosa Cables
MONACOR SMC-1 Stereo-Mono-Converter
ROLINE GOLD Audio Connection Cable 3.5mm Stereo - 2 x Cinch (RCA), M/M, 2.5 m - SECOMP International AG