PA SUBWOOFER (ACTIVE) 'Active Mackie DLM12S subwoofer. Ultra-efficient 2000W Class D power amplifier. TruSource T technology. Max SPL: 125dB @ 1m. Vertically aligned driver with TruSource magnet designed by Mackie. 12'' woofer with 3'' coil. Incredibly compact and lightweight. Powerful TruSource DSP providing perfect clarity, coherent dispersion, and unmatched fidelity. Powerful built-in DLP Digital mixer with a bright OLED display. Mounting bracket to attach an SPM300 for flying the DLM series.'