DS18 WAVES1300.1 Full Range 1 Channel Monoblock 1300 Watts Max Water Resistant Marine Amplifier RELIABLE TECHNOLOGY: Extruded Aluminum Chassis. White, Glossy, and Water Resistant Paint Heat sink. MOSFET PSU Transistors. Fuller Regular PMW Power Supply. Low Pass Crossovers. 200MV-5V Low level Inputs. Direct 4GA power Terminals. 8GA Speaker Terminals AMAZING POWER HANDLING: 2-Ohm Stable. RMS @ 4-Ohms: 1 x 240 Watts. RMS @ 2-Ohms: 1 x 360 Watts. RMS @ 1-Ohm: 1 x 540 Watts. ADAPTABLE PERFORMANCE: Crossover and switching: Variable Low Pass: 40 Hz - 300 Hz. Bass Boost: 0-12 db. THD% &lt;0.1%. Signal-to-noise Ratio: &gt; 100 db. 10 Hz - 300 Hz Frequency Response. 10 Hz - 40 Hz Subsonic Frequency. Variable Input Level Control FOUR WAY PROTECTION CIRCUIT: Thermal protection, over-load current protection, output direct current protection, speaker short-circuit protection DIMENSIONS (Lx W x H) Inches: 12" x 7.78" x 1.5". DIMENSIONS (Lx W x H) MM: 303 x 197.5 x 38