4X B2-SUB frequency response, standard and INFRA mode
Frequency response (-5 dB) with D12 - 37 Hz - 90 Hz / 32 Hz - 68 Hz
Frequency response (-5 dB) with A1 - 37 Hz - 125 Hz / 32 Hz - 68 Hz
Maximum sound pressure (1 m, full room) D12 or A1 - 139 dB/136 dB
(SPLmax peak, pink noise test signal with crest factor 4)
Input level (100 dB SPL / 1 m) –20 dBu / –19 dBu
B2-SUB subwoofer
Nominal impedance 4 ohms
Load capacity (RMS / peak 10 ms) 600 / 2400 W
Connection NL4: 2+/2–
They sound beautiful .They have always been used in quality controlled air, no smoke , kids, or pets