(Another, simple way to) Add / install aux (auxiliary) port to Sony XR - C550RDS car audio system (car stereo system) - A low cost way! Download service manual for Sony XR - C550RDS car audio system: You need these items to do this: *Solder *Soldering iron *Solder Sucker (Desoldering pump) *Screen wire *Screwdriver (Phillips or Frearson type) *3.5 mm stereo female socket (PJ - 307 recommended) *Insulation tape 100% works perfectly. Additional: Use D-Bass level 1 / 2 Bass level 1 / 2 Maximum Treble (level 4 / 5 for full range audio amplification with deep / dynamic bass! (Super high quality) Follow me:
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