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. You also have wireless mobile device playback capability thanks to the built-in Bluetooth.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.