pkg Pioneer GM-D8601 Monoblock 800W RMS Class D Amplifier + Pair of TS-W311D4 12" 1400W Dual 4-Ohm Subwoofers GM-D8601- RMS Power Rating: 4 ohms: 300 watts x 1 chan. | 2 ohms: 500 watts x 1 chan. | 1 ohm: 800 watts x 1 chan. | Max power output: 1500 watts x 1 chan. Wired remote bass level control included | LED power (green) and protect (red) indicators | Variable Bass Boost (0 to +18 dB bass boost at 50 Hz) Frequency response: 10-240 Hz | 4 gauge power and ground wiring is required for installation. Contact us for information regarding a discount on select amplifier kits from our website when purchased together with this amplifier. | Dimensions: 10-7/16"W x 2-3/8"D x 7-7/8"H TS-W311D4- Champion Series Subwoofer | Power Handling: Peak: 1400 watts | RMS: 400 watts Top-mount depth: 5.9" | Frequency Response: 20 - 125 Hz | Sensitivity: 95dB