pkg (2) Memphis 15-SRX12S4 12" 250W RMS 500W Max Subwoofer + Power Acoustik RZ1-1500D Monoblock 1500W Max Class D Amplifier 15-SRX12S4 - Power Handling: 250W RMS / 500W Peak | Sensitivity: 88dB | Injection Molded Polypropylene Cone | Butyl Rubber Surround | Spring Loaded Terminals Woven Tinsel Leads | Single or Dual 4-Ohm Impedence | Magnet Size: 30oz | Mounting Depth: 4.96" RZ1-1500D - Monoblock RAZOR Series Full Range Class D Car Amplifier | RMS Power Rating: 4 ohms: 600 watts x 1 chan. | 2 ohms: 900 watts x 1 chan. | Max power output: 1500 watts x 1 chan. Wired remote bass level control included | Soft start turn-on | Mono channel operation | Speaker-level (high-level) inputs | 3-way protection circuitry (thermal, overload, and speaker short protection) | Heavy duty aluminum alloy heat-sink for extreme heat dissipation Nickel-plated RCA level inputs | Nickel-plated screw terminals | Variable subsonic filter (10-50 Hz, 24 dB/octave) | Variable low-pass filter (50-250 Hz, 24 dB/octave) | Dimensions: 4-3/4"W x 10"L x 1-1/3"H