Design Double 18\\\" Multi-loaded Bandpass / Horn Advantaged Subwoofer. Impedance 4 ohm Power handling RMS 1000 Watt IEC268 Maximum power handling [i] 1600 Watt / 2400 Watt peak Sensitivity 1 W/1 m [ii] 106 dB SPL for single enclosure (112 dB for stack of 4) Max SPL [ii] 136 dB (cont. max SPL / 1 m) (142 dB for stack of 4) 136 - 140 dB (SPL peak / 1 m with 1000 - 2400 Watt) Frequency response -10 dB [iii] 27 Hz - 300 Hz Frequency response ±3 dB [iii] 30 Hz - 300 Hz Crossover frequencies Processor Controlled via CRED Active crossover frequencies 100 Hz - 150 Hz