Pyle PLMRA400 4 Ch 400 Watt Waterproof Marine Boat Power Audio Amp Amplifier
4 Channel Amp System
Dual MOSFET Power Supply
Marine Grade Construction
Waterproof Marine Rating IP-01
Dual Adjustable Input GAIN Level Controls
Dual High Level Speaker Input Connectors
Dual RCA (L/R) Input Connector Jacks
Gold-Plated Speaker Output Terminal Connectors
Adjustable Input GAIN Level Control
Anti-Thump Delay Circuitry
Built-in Thermal, Overload & Speaker Short Protection
Heavy Duty Aluminum Alloy Heatsink
Power ON LED Indicator
Remote Turn ON/OFF 
Technical Specs:
Output Power: 100 Watt x 4 MAX
Amplifier Class: AB
Fuse Type: 20A
Input Gain Impedance Adjustment: 1 - 300mV
Frequency Response: 15 - 30kHz +/-3dB
Input Impedance: 10k Ohms (Low), 100 Ohm (High)
Input Sensitivity: 250mV (Low), 2.5V (High)
T.H.D.: <0.04%
Power Supply: DC 12V
Matching Speaker Impedance: 4-8 Ohms
Dimensions (L x W x H): 9.0'' x 7.9'' x 2.0''
Sold as: Unit
Weight: 4.14 lbs.
ships within 24hrs weekdays.