Pioneer TS-WX140DA Compact Series 8" x 5-1/4" - 170 W Max Power - Compact Active Subwoofer || Built-in 170 W Max (50 W RMS) Class D amplifier || 8" x 5-1/4" Rectangular Subwoofer (7" woofer effective surface area) || Pioneer DIGITAL BASS CONTROL digitally matches the subwoofer output to your listening preference and vehicle interior || Compact enclosure for installation flexibility (11" W x 7.87" D x 2.76" H) || EV optimized - maximum current consumption only 4.3 amps