The Pioneer GM-E360X4 4-channel bridgeable amplifier is built for high power output and performance to deliver great sound. Features include large-capacity electrolytic capacitors for increased voltage stability and instantaneous output of large current. Improved circuit design using a PCB board made of glass epoxy substrate delivers high conductivity . increased temperature stability . and improved insulation resistance. For added flexibility . a variable LPF and HPF allow fine-tuning your audio system along with a two-step Bass Boost for optimal bass level adjustments according to listening preferences and music characteristics. This amplifier can be used with either OEM or Aftermarket HeadUnits. From dramatic distinction to dramatic design . Pioneer’s new GM-Series amplifiers are thrillers in every sense . pushing the limits of flexibility and functionality. The 4-channel GM- E360X4 delivers a whopping 1 .000 watts max – plenty of juice to power your speakers. It’s also got built-in low-pass/high-pass crossovers . speaker level inputs for easy connection to an OEM headunit and oversized power terminals.