Find Reviews and Compare Prices for:       All ProductsGuitar Effects     0.0 (0)   Add a review Electro-Harmonix XO Knockout Attack Equalizer Guitar Effects Pedal   Get down! Generates deep, phat bass tones one octave below the notes you play. Two separate smoothing filters enable you to tailor your sub-octave signal to the exact bass sound you desire, separating the Octave Multiplexer from other octave devices... Have a question? Just Ask! Member Reviews Compare Prices Product Spec Send to a friend Set Price Alert Searched Electro-Harmonix XO Knockout Attack Equalizer GuitEffects Pedal in 150 stores, 2 results found Image Description   Store   Price Electro-Harmonix Knockout Attack EQ If this item doesn't belong here, click Remove and help us keep our results accurate.   Amazon.com   2 Store Reviews   $65.95 (used) Go to Store Electro-Harmonix Knockout Attack EQ If this item doesn't belong here, click Remove and help us keep our results accurate.   Amazon.com   2 Store Reviews   $66.75 Go to Store You can also search these stores   Find this product on eBay   eBay   0 Store Reviews   Search on eBay Are we missing a store? Let us know! Something wrong in this page? Let us know! Related products: More Equalization & Tone Shaping Guitar Effects Other Guitar Effects internal use: spec33 spec242 spec582