Introducing the all-new HTI88 in-wall subwoofer which combines superb sonic performance with outstanding installation flexibility, making it ideal for a wide variety of custom-installation home theater applications. The HTI88 features dual high-power 200mm (8'') aluminum-cone woofers with cast-aluminum frames, heavy-duty voice coils with Kapton ® formers and additional enhancements, to deliver outstanding clarity and definition down to 35Hz. With separate inputs for each subwoofer, the HTI88 can operate in stereo or mono mode, or use two HTI88 subwoofers in your system, one for each channel. Optional back box available for HTI88 subwoofer.