Building your own speakers? The Reckhorn D-165 Subwoofer Chassis is a solid choice. This 6.5-inch (175mm) driver delivers deep, punchy bass with an 80W RMS power handling and 4-ohm impedance. Features a cast aluminium basket, double magnet system, and a 38mm voice coil for reliable performance. Frequency response runs from 20Hz to 1000Hz, so it handles lows really well. Ideal for compact subwoofer enclosures, 2-way systems, or multi-driver setups. Recommended enclosure volumes are provided for sealed or ported designs. With an efficiency of 83 dB, it's great for home audio or car audio projects. Weighs 2.3kg—feels robust. Whether you're a DIY enthusiast or upgrading an existing setup, this chassis offers great value and performance. Pump up the bass!