🎧📼 3.5mm • Composite RCA Audio Adapter

These adapters convert 3.5mm audio jacks—either stereo TRS or mono TS—into RCA connectors for use with home stereos, TVs, mixers, and legacy AV gear. They’re passive, compact, and ideal for adapting consumer-grade audio sources to RCA inputs or outputs.
 
🔧 Adapter Forms
1x 3.5mm TRS Female → 2x RCA Male
Splits stereo signal into left/right RCA channels
1x 3.5mm TS Female → 1x RCA Male
Routes mono signal to a single RCA input
1x 3.5mm TRS Female → 1x RCA Male
Sends stereo signal summed or left-only to RCA
1x 3.5mm TRS Male → 2x RCA Female
Accepts stereo RCA input into 3.5mm stereo jack
1x 3.5mm TRS Male → 1x RCA Female
Accepts mono or summed stereo RCA into 3.5mm jack
 
🖥️ Compatible Devices
🎧 3.5mm side:
Phones, tablets, laptops, MP3 players
Headphone outputs, DACs, embedded boards
📼 RCA side:
TVs, VCRs, DVD players, stereo receivers
Mixers, powered speakers, AV switchers
Audio patch bays and legacy AV gear
 
✅ Common Uses
🔊 Connect stereo device to RCA-equipped stereo system
📼 Patch mono signal into RCA input (e.g., TS → RCA)
🎛️ Feed stereo RCA output into 3.5mm input (e.g., TRS male → RCA female)
🧪 Prototype stereo-to-mono routing with legacy gear
📻 Integrate modern sources into vintage AV setups
🎥 Use with camcorders, projectors, or AV switchers
 
🧠 Signal Format
🎧 3.5mm TRS:
Tip = Left audio
Ring = Right audio
Sleeve = Ground
🎧 3.5mm TS:
Tip = Mono audio
Sleeve = Ground
📼 RCA:
Red = Right channel
White = Left channel
Single RCA = Mono or summed stereo
⚠️ Adapters may split, sum, or isolate channels depending on wiring
 
⚠️ Things to Watch Out For
🚫 Not suitable for balanced audio or mic-level signals
🔄 Some adapters sum stereo to mono—check wiring before use
📉 Long cable runs may introduce noise or signal loss
🔌 RCA inputs may expect higher voltage—check levels
🧪 TRS female → RCA male may only output left channel depending on design
 
🛠️ Quick Tips for Beginners
🧭 Match RCA colors to input ports: red = right, white = left
🔍 Confirm TRS vs TS plug—TRS has two black bands, TS has one
🧵 Use stereo adapters for music playback, mono for voice or signal routing
📼 Avoid using with “PHONO” inputs—use “AUX” or “LINE IN”
🧯 Test adapter with known signal source before live use