With high power packed into a low-profile 1.7-pound package the SoundStream Stealth Series 1000-Watt Class D 4-Channel Amplifier is a surefire way to bring the best out of your car audio. This SoundStream 4-channel amp features 90 watts x 4 RMS power at 4 ohms 125 watts x 4 RMS power at 2 ohms and 250 watts x 2 RMS power bridged at 4 ohms. With a highly efficient class D full-range design as well as variable 12dB high pass low pass and subsonic filters it helps your subs deliver clear accurate sound. This SoundStream 1000-watt amp also features a MOSFET power supply with IRTM transistors as well as a built-in hybrid aluminum alloy heatsink for thermal protection and protection from direct short and overloads too.