The Pioneer GM-DX971 is a 1-channel subwoofer amplifier which can deliver up to 1 .200 watts RMS (2 .400 watts max) to your car’s subwoofer . for powerful bass that produces a strong and heavy beat. Highly efficient Class D technology and CTA-2006 compliancy keep this powerful amp running strong in its small chassis that fits in a lot of out-of-the-way spaces. The speaker-level inputs allow installation of this amp into a factory system with no RCA connections. The amplifier switches its input mode automatically when it detects the high-level signal . eliminating the need to run a turn-on lead to your receiver or fuse box. The amp’s got a low-pass filter that lets you quickly sharpen and focus the bass to suit your vehicle’s interior . and a wired remote boost that lets you control the amount of bass boost from the front seat. The GM-DX971 amp uses high-grade electronic parts and gold-plated RCA connections to ensure maximum performance.