Find the lowest price for:       All ProductsGuitar Effects     0.0 (0)   Add a review Seymour Duncan SFX-04 Twin Tube Mayhem Distortion Guitar Effects Pedal...   The Seymour Duncan SFX-04 Twin Tube Mayhem is a distortion pedal with a high-quality guitar preamp that includes a built-in boost. Using a duo of premium, mil-spec, subminiature, USA-made Phillips-Sylvania 62051 pentode tubes, the Seymour Duncan ... Have a question? Ask the Experts! Set Price Alert Compare Prices Product Spec Member Reviews Recommend to Friends Searched Seymour Duncan SFX-04 Twin Tube Mayhem Distortion Guitar Effects Pedal in 150 stores, 3 results found Image Description   Store   Price Seymour Duncan SFX-04 Twin Tube Mayhem Distortion Guitar Effects Pedal If this item doesn't belong here, click Remove and help us keep our results accurate.   Musicians Friend   5 Store Reviews   $227.5 Go to Store Seymour Duncan SFX-04 Twin Tube Mayhem If this item doesn't belong here, click Remove and help us keep our results accurate.   Sweetwater   1 Store Reviews   $229.97 Go to Store Seymour Duncan SFX-04 Twin Tube Mayhem Signed If this item doesn't belong here, click Remove and help us keep our results accurate.   Sweetwater   1 Store Reviews   $229.97 Go to Store Are we missing a store? Let us know! Something wrong in this page? Let us know! Related products: More Overdrive, Distortion, Fuzz & Boost Guitar Effects Other Guitar Effects internal use: spec24 spec275 spec584