Don't let these little monsters fool you. The latest and greatest of Class-D full range technology are small but very mighty. Once regarded as “dirty power”, Class_Ds stable performance, thanks to high power capability, maximum efficiencies, and low tolerance components, rivals traditional full range applications. Minimal power requirements, ultra-micro footprint, unbelievable sound quality, and easy install make Stealth amplifiers great for any car, motorcycle, boat, or off-road vehicle… Features: Premium High Efficiency Class D Amplifier Hybrid Aluminum Alloy Heatsink for Optimum Dissipation 2-ohm Minimum Impedance Operation MOSFET Power Supply w/ Audiophile Grade IRTM Transistors Military Grade SMT PCB Maintains Dynamic Performance Direct Short, Thermal, & Overload Circuits Protect Amplifier 250mV-12V High Level or Low Level RCA Input Quick Disconnect RCA/High Level Wire Harness Quick Disconnect Power and Speaker Output Harness Full Variable 12dB High Pass, Low Pass Crossovers Stealth Series 500w Class D 4ch. Amplifier RMS Power 4Ω45 x 4 RMS Power 2Ω65 x 4 RMS Power 4Ω Bridged 125 x 2