🎉 Elevate Your Drive with Pioneer Power! Experience a booming 400W output that transforms your car audio. Enjoy distortion-free audio with less than 0.05% distortion. Hear every note with a frequency response spanning 10-40,000 Hz. Plug & Play design ensures you’re ready to rock in no time. Connect effortlessly via OEM radio speaker outputs with automatic switch-on. 400W power 10-40,000 Hz 4 channels The Pioneer GM-D1004 is a high-performance 4-channel car amplifier designed for easy installation and superior sound quality. With a powerful 400W output and a frequency response of 10-40,000 Hz, it ensures a distortion-free audio experience. Its Plug & Play feature and automatic switch-on via OEM radio speaker outputs make it a hassle-free upgrade for any car audio system.