The best replacement for 3.5mm is rca.

The best alternatives to 3.5mm are rated as following:
★★★★★  rca
★★★★  2.5mm
★★★★  1/8
★★★  sma
★★★  1/4
★★★  usb
★★★  1 8
★★  optical
★★  xlr
★★  6.3mm
★★  1/4 inch
★  usb microphone
★  usb headset
★  1\/8
★  1 8 inch
★  1 4
  1\/8 inch
  optical audio
  1\/4

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3.5mm
rca
2.5mm