How to Hook Up an Auxiliary Cable to a Guitar Amp

Category: Tech

How to Hook Up an Auxiliary Cable to a Guitar Amp

A guitar amp typically uses a quarter-inch cable to receive audio signals from a guitar or other device, which is far larger than the 3.5mm connection used by an auxiliary cable. If you want to hook up an auxiliary device to your guitar amp, you just need an adapter to convert the auxiliary plug into a quarter-inch plug. Such converters are readily available at any reasonably sized electronics store.

Things You'll Need

  • 3.5mm to quarter-inch adapter
  • 3.5mm cable


  • Plug the 3.5mm end of the cable into the "Line-Out" port of the device you want to play through your guitar amp. This may be the headphone jack of an MP3 player or the speaker output of a computer.

  • Insert the opposite end of the cable into the 3.5mm connection on the adapter.

  • Plug the quarter-inch adapter into the line-level input on the guitar amp. If your amp doesn't have a line-level input you can use the standard instrument input.

  • Turn the volume on the amp way down.

  • Power on the two devices. The audio signal now feeds into the amp and plays through its speaker(s). Adjust the volume as necessary.

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