🎧📼 3.5mm • Composite RCA Audio Cable

This cable splits a stereo signal from a 3.5mm TRS source into two mono RCA channels—typically left (white) and right (red). It’s used to connect portable devices to home stereos, TVs, mixers, and legacy AV gear.
 
🔧 Converter Form
3.5mm TRS male → 2x RCA male (red + white)
Stereo signal split into two unbalanced mono channels
Passive cable—no signal conversion or amplification
Often labeled “Y-cable” or “mini-jack to RCA stereo”
 
🖥️ Compatible Devices
🎧 3.5mm side:
Phones, tablets, laptops, MP3 players
Audio output from embedded boards or DACs
Headphone jacks on TVs or monitors
📼 RCA side:
Home stereo receivers and amplifiers
TVs, VCRs, DVD players
Mixers, powered speakers, AV switchers
 
✅ Common Uses
🔊 Connect portable device to home stereo system
📼 Patch stereo audio into RCA-equipped TV or monitor
🎛️ Feed stereo output into mixer or recording interface
🧪 Prototype stereo-to-mono routing with legacy gear
📻 Integrate modern sources into vintage AV setups
 
🧠 Signal Format
🎧 3.5mm TRS:
Tip = Left audio
Ring = Right audio
Sleeve = Ground
📼 RCA:
Red = Right channel
White = Left channel
🔁 No balancing—signal remains unbalanced throughout
⚙️ Ground shared across both RCA channels
 
⚠️ Things to Watch Out For
🚫 Not suitable for balanced audio or mic-level signals
📉 Long cable runs may introduce noise or signal loss
🔌 RCA inputs may expect higher voltage—check levels
🧪 Some devices auto-detect RCA—may need manual input switch
 
🛠️ Quick Tips for Beginners
🧭 Match RCA colors to input ports: red = right, white = left
🔍 Confirm TRS plug—not TRRS (which adds mic channel)
🧵 Keep cable short for best signal integrity
📼 Use with “AUX IN” or “LINE IN” ports—not “PHONO”
🧯 Avoid using with powered outputs unless rated for it