Dillinger Labs DFB MK2 - Battery-powered SKAA subwoofer, compatible with all SKAA hubs and transmitters, configuration: 2x 8" woofers, power: 144W RMS, frequency range: 25 - 180 Hz (-3 dB), max. SPL: 122 dB, latency: 19 - 36 ms, 6 EQ presets, battery life: up to 40 hours, charging time: 2.5 hours, range: up to 50 metres, 35 mm speaker flange, housing material: 12 mm birch multiplex, dimensions (W x H x D): 617 x 250 x 475 mm, weight: 15.5 kg, colour: black