http://www.one-control.com/sonic-silver-peg.html
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Features
The Silver Sonic Peg reproduces the sound of an iconic 70s tube amp with a similar name. This highly responsive bass pre-amp is adaptable to any style of play. With a dynamic tone range similar to the original amp, the switch on the side of the enclosure allows for a boost/cut of 15dB. Evidently, this pedal is perfect for any bass player.