This bundle includes SPL-120 12" Subwoofer (Ebony) WA-2 Wireless Subwoofer Kit SPL-120 12" Subwoofer (Ebony) The SPL-120 subwoofer is a step up from the Klipsch Reference series. Featuring a high-efficiency Class-D amplifier and a spun-copper Cerametallic woofer, the SPL Series subwoofers deliver best-in-class low-frequency output. Features 12" spun copper cerametallic woofers Bass reflex through exclusive front-firing internal port Class-D amplifier with 300W RMS/600W peak Premium scratch-resistant finish Strong flexible removable magnetic grill Dimensions: 17.75" x 14.7" x 19.9" Spun copper Front-Firing Cerametallic Woofers are exceptionally lightweight and extremely rigid providing remarkable low-frequency response with minimal cone breakup distortion for cleaner output with less amp power. High efficiency class D amplifier. The integrated high-efficiency amplifier features an analog preamp design that maintains the original signal path for cleaner reproduction of true sources. The Class D output stage ensures maximum efficiency for maximum output detail and low-frequency power. Front firing slot port with exclusive internal flare technology. Proprietary internal geometry minimizes port noise for clean, distortion-free low frequencies. Front-firing design allows for placement flexibility. The Klipsch WA-2 Wireless Subwoofer Kit (sold separately) enables high-resolution wireless connectivity for easy placement anywhere in your room and optimizes low-frequency output and response. Connect up to four WA-2 Wireless Kits to compatible Klipsch subwoofers in a single room for a completely wireless connection. Flexible low-pass control and variable phase control let you tune the subwoofer to your Klipsch speakers and your room, setting the ideal level of bass. Line-level/LFE RCA inputs ensure home compatibility.