Rockford Fosgate P300-12 Single 12 300 Watt Sealed Powered Active Subwoofer. If you need to quickly add bass to a system or want to alleviate the hassle of separate amplifiers and subwoofers, then the P300-12 is the right one for the job! The P300-12 features a Punch 12 subwoofer in a custom sealed enclosure and is powered by a mighty 300-Watt amplifier. The system is all-inclusive, so you only need to run power, ground and a signal from the source to get this baby moving. Features a durable exterior that resists scrapes and bumps while in the trunk or cargo area. The P300-12 powered subwoofer is an “all-in-one” solution when adding bass to a factory system or just to save space. This model features a 12 subwoofer in a sealed enclosure powered by an internal 300-watt amplifier. “Closed-loop” design ensures optimum performance between woofer, amplifier and enclosure. Built-in 0°/180° phase switch. Separate low level and speaker level inputs. Built-in adjustable bass boost EQ. Adjustable 12db/Octave low pass crossover. Intelligent auto turn on/off function. Thermal and over voltage protection. High-efficiency, low current design. Remote bass level control included. Proprietary high output woofer. Constructed with 5/8 MDF. Large AWG input terminals. Covered with industrial heat activated vinyl. Nominal Impedance (ea): n/a. Enclosure Material: 5/8 MDF (Medium Density Fibreboard). Frequency Response: 35Hz to 150Hz. Integrated Amplifier: 300 Watts RMS. Gain & Bass Boost. Low-Level: 1 RCA Pair. High-Level: Left/Right Summed Inputs. Power Input Connector: Removable Connector Power/Ground/Remote. Power Wire Gauge: 8 AWG. Heat Sink Type: Extruded Aluminium. Visual Indicators: Power Protect. Dimensions – Box (H x W x D) / Wedge (H x W x D1 x D2). 15 x 19.8 x D1 11 – D2 7 (in). 38.1 x 50.29 x D1 27.94 – D2 17.78 (cm).