- controls the amount of low frequency tones
- controls the amount of mid frequency tones
- controls the amount of high frequency tones
- controls the output level
- controls the tone (bass/treble?)
- controls the amount of distortion
The SQ-04 is a kind of three-in-one distortion effect. It features three fully independent distortion circuits with different frequency-responses, which can be mixed together in any way you like it. This unique construction enables you to create extraordinary sounds, which were impossible to realize by other means and will satisfy many metal enthusiasts.