Monoprice 3.5mm TS Mono Plug to 3.5mm TRS Stereo Jack Adapter, Gold Plated - Monoprice.com
3.5 Stereo to Mono Adapter – Rugged Radios
RCA Mono Male RCA to Two Female Stereo Adapter Y Cable - 6" - EACH - Dedicated Audio
Amazon.com: Disino 1/4 Mono to 3.5mm Stereo Adapter, Gold Plated 6.35mm TS Male Plug to 1/8 inch TRS Female Audio Connector - 2 Pack : Electronics
1/4" Stereo Audio Jack Plug Adapter Single Male to Female 6.35mm Dual Mono Stereo Jack Headphone Microphone Y Splitter Converter
Adaptateur mono jack 3.5 mm / M vers jack 6.35 mm / F - Trademos
hardware - Does professional quality stereo to mono conversion require a special adapter - Sound Design Stack Exchange
Single Channel) - DC 3.5mm to 6.35mm Mono Cable - 6.35mm 1/4 inch Mono Jack Socket to 3.5mm 1/8" Mono Jack Plug Audio Adapter Converter Cord 0.3m (Single Channel) : Amazon.fr: High-Tech