PD7 Phat-Hed

Bass Overdrive

The PD7 is an overdrive/distortion designed especially for basses and bass amps. It has a character that is completely different from conventional guitar amp distortion units, and features heavy ultra-low sounds together with the smooth high range typical of playing through a guitar amp.

http://www.effectsdatabase.com/model/ibanez/tonelok/pd7