6.3 mm. Jack - RCA stereo audio cable pair

3.5mm. Stereo Male (TRS) to (2) RCA Female (left/right) Shielded Y-Cable, 6in.

enoaudio Mogami 2534 Quad (L,R) Stereo Pair Balanced Cable, Neutrik 6.3mm TRS

Audtek 14 AWG 12ft Professional Grade Braided Speaker Cable Wire with Gold Plated Banana Jacks

While most mobile devices use the 3.5mm stereo headphone output, most home audio systems with an amplifier or receiver use RCA jacks for audio inputs.

Monoprice Audio/Stereo Cable - 6 Feet - Black | 3.5mm Stereo Plug/2 RCA Jack, Mp3 Player/Phone Headphone Output to Home Audio System

ATR6250x, Cardioid 3.5mm Stereo Microphone, Audio-Technica

Phone connector (audio) - Wikipedia

6.3 mm. Jack - RCA stereo audio cable pair

This cable is designed to connect gear with stereo unbalanced phone jacks to gear with stereo phono jacks; Delivers high performance and versatile

TNP Premium Dual 1/4 Inch to Dual RCA Audio Cable (6FT) - Male 6.35mm 1/4 Phono Mono to RCA Connector Wire Cord Plug Jack

2 RCA (jack) Connectors to 6.3 mm Mono (plug) Connector, Adapter (251- – Steren Solutions