Function f(x) Accufunkture Envelope-Controlled Filter $155.00 Quantity Function f(x) Accufunkture Envelope-Controlled Filter quantity Add to cart Description Function f(x) Accufunkture Envelope-Controlled Filter Additional information Model Envelope Filter Add to Wishlist Category: Effects/Pedals/Synths - Used. Related Products Ibanez Multi-Effects UE300 $299.00 Univox (Shin-Ei) Super-Fuzz Call for Price Ibanez Phaser PT9 $130.00