If you're looking for a bass phaser that's simple to use and won't zap your low end, you can't beat the Aguilar Grape Phaser. This toneful 2-knobber creates liquid-y movement and fat, funky filter effects on the fly. There really isn't an unusable setting on this pedal — it's that well designed. The Grape Phaser boasts a Color control, which sends a portion of your affected signal back through the second stage of the phase-shifting circuit to create an almost auto-wah-like effect, evoking '70s slap-and-pop affectations. Dialing back the Color knob and slowing the rate adds texture and focal points to melodies and solos. As with all Aguilar effects, the Grape Phaser's 4-stage circuitry preserves your low end, so you don't have to worry about root notes popping through.