In Phase XTB-8A – 8 Active Subwoofer Enclosure with Built-in Amplifier & Remote. Boost your car audio system with the In Phase XTB-8A, a compact yet powerful 8 active subwoofer enclosure designed to deliver deep, clean bass without taking up too much space. With a 600W Max / 200W RMS built-in Class D amplifier, this sub is perfect for underseat or boot installations where space is limited but performance is essential. Crafted with a durable glass fibre cone, the XTB-8A ensures responsive and precise bass while its quick-connect terminals and RCA to Molex input harness make installation fast and hassle-free. It’s compatible with both aftermarket and factory head units, with support for RCA or high-level (bare wire) inputs. A wired bass remote control is also included, letting you easily tune your bass levels directly from the driver’s seat. 8 Active Subwoofer with Built-in Class D Amplifier. 600W Max / 200W RMS Power Output. Durable glass fibre cone for clear, responsive bass. Compact subwoofer box – ideal for underseat or boot installs. Quick Release (Molex) connector for easy installation/removal. Includes RCA to Molex input harness. Works with aftermarket & factory head units. High-level (bare wire) input supported. Wired bass remote control included. Size: similar to a desktop PC case. Plug-and-play quick release system. Compatible with RCA and high-level inputs. High-level audio input supported (bare wire connection). Drivers wanting powerful bass in a compact form. Hidden or space-saving subwoofer installations. Upgrading a full car stereo system with rich, deep bass. The In Phase XTB-8A delivers true bass performance with convenience and easy installation – the perfect upgrade for any car audio setup.