Pedals and effects

Use a power supply that matches the pedal’s specifications. First verify the bypass signal, then engage the effect.

Check:

• power-up and LEDs;
• footswitch;
• bypass;
• battery operation where relevant;
• stability of the power jack;
• signal loss or intermittent behaviour when cables are moved.

Do not improvise voltage or polarity. Incorrect power can damage the unit.

If the pedal requires an unusual power supply, confirm whether it is included or add its cost to the final purchase price.

Turn every control through most of its range rather than testing only the sound you normally use.

Also verify:

• all inputs and outputs;
• secondary switches;
• tap tempo;
• stereo, send/return or loop functions where present;
• expression and external control;
• alternative modes.

A small amount of noise while turning a pot can have several causes, while a control that completely drops the signal or jumps values deserves more attention.

Compare the available functions with the model documentation so you can tell whether something is missing or you are simply using a different mode.

For a digital effect, test the management functions as well as the audio path.

Check:

• loading and changing presets;
• display operation;
• encoders and buttons;
• saving an edit when safe to do so;
• USB, MIDI or Bluetooth if important to your use;
• power supply compatibility;
• any obvious reset or lock issue.

You do not need to test every advanced feature, but you should verify the functions that determine how you will actually use the unit.

If software access or an account is required, clarify before buying which elements depend on the previous owner.