Add to Cart Foxgear Knee Trembler - Guy Pratt Signature Tremolo Pedal Foxpedal MSRP: Now: $119.00 Was: Desc The Knee Trembler (Guy Pratt Signature Model) is an insanely good tremolo effect with unique LFO, designed in direct collaboration with Guy Pratt of Pink Floyd fame, perfect for his... FOX-KTM MSRP: Now: $119.00 Was: Add to Cart Qty in Cart: 0 Quantity: Decrease Quantity: Increase Quantity: Price: MSRP: Now: $119.00 Was: Subtotal: Add to Cart