This Cx-Series Mono Amp Is Now One-Ohm Stable, Giving You Even More Power And Wiring Options For Your System! This Class-D Cxa400.1 Features A Variable Bass Boost With Kickeq™, Giving You As Much As A 6Db Of Extra Bump. A Powerful 12Db Crossover And 24Db Subsonic Filter Is Included, Letting You Quickly Tune Your System To Perfection. Use The Full-Range Outputs To Expand Your System With Other Bass Amps, Or A Full-Range Amp To Complete Your System. From Your Dash, A Simple Turn Of The Optional Cxarc Remote Bass Controller (Sold Separately) Increases Your Output To Fit Your Choice Of Music.Cx.1 Amplifiers Accept Up To 40 Volts (400 Watts) Of Speaker-Level Input Signal. This Kind Of Flexibility Both Makes Line-Out Converters Unnecessary And Optimizes Your Sound Quality At The Same Time!.Expand Your System With Full-Range, Rca Pass-Through Outputs, Then Choose A “Standard” Mount Or A Cool Vertical Mount With The Included Hardware.Cx.1 Amps Deliver As Much As 400 Watts Into One Bass Channel. See Below For More Details.