The DXS15XLF is a powered bass-reflex type subwoofer with extended low frequency. The 1600W Class-D amplifier coupled with a new proprietary 15" transducer produces a best-in class maximum SPL of 136dB SPL with superb clarity and power. The lightweight yet durable plywood cabinet can be fitted with an optional wheel kit (SPW-1) for true portability. Durable black finish.