Specs: 2 x 60 / 100 W RMS @ 4 / 2 Ohmssold in pair (left/right)Patent Pending BTL Powered "FreeLoad" Technology "POWER CABLE NOT NECESSARY"Harvests both B+ and Audio Signal From Standard Head Unit Speaker OutputsHighpass 60, 80,100 HzHigh Level Auto Turn OnSelectable 4 and 2 Ohm PlayThermal ProtectionShort Circuit & Over Voltage ProtectionDiscrete surface mount technologyIPx6 Water Intrusion Rating The PM100X1 is a 100 Watt dynamic power mono amp using DC and AC voltages present on existing radio speaker outputs. This design allows connection to a speaker wire without running a B+ cable. It also presents a safe load to the radio amp circuit to eliminate excessive wear and tear on the radio, making it ideal for OEM and aftermarket radio integration. The conformal coated PCB allows for mobile, motorsport and marine applications. PM100X1K "KIT" ships with 2 pcs.PM100X1Punch Marine 100 Watt Full-Range Mono AmplifierThe PM100X1 is a 100 Watt dynamic power mono amp using DC and AC voltages present on existing radio speaker outputs. This design allows connection to a speaker wire without running a B+ cable. It also presents a safe load to the radio amp circuit to eliminate excessive wear and tear on the radio, making it ideal for OEM and aftermarket radio integration. The conformal coated PCB allows for mobile, motorsport and marine applications. PM100X1K "KIT" ships with 2 pcs. THIS UNIT NOW BEING SOLD AS PM100X1K (KIT INCLUDES 2 PCS)Continue Vermogen:2x 60 Watt RMS bij 4 Ohm2x 100 Watt RMS bij 2 Ohm Patented BTL Powered "FreeLoad" Technology (US 9,438,181 B1) Harvests both B+ and Audio Signal From Standard Head Unit Speaker Outputs Uses Stored Energy from BTL Amplifier to Produce Dynamic Power of Over 100W Current Limited to Protect Head Unit for Both 4 Ohm and 2 Ohm Configurations High Level Turn On Optional B+ Connection for Non-Standard Speaker Outputs Selectable 4 and 2 Ohm Play 60, 80, and 100 Hz Selectable 12dB/Oct HP Butterworth Crossover Small Stealth Package that Allows for Anywhere Installation Pig Tail Connectivity for Easy Installation Extruded Aluminum Heat Sink Muted turn on Thermal Protection Short Circuit & Over Voltage Protection Discrete surface mount technology CEA-2006 Compliant & CE Compliant 2 Year Standard Warranty warranty info