Applications:  It is sophisticated designed and ideal for Theaters, Music Halls, Large Discotheques, Night Clubs, KTV rooms, touring events,Stage Monitors etc. The Sub bass we designed mainly for use in applications requiring accurate and powerful reproduction of low frequency energy at very high levels, and where extended bandwidth is required as well, All subs incorporate high excursion drivers, ultra-low vibration walls to increase the total low frequency output power and SPL, resulting in dramatic reduction of port noise, maximized dynamics and power handling and an exceptional level of performance ,to provide clean, dark, the explosive low frequency sound effect to you. Model SUB218TType Dual18 Inch Passive Port-loaded Sub bassFrequency response 28Hz-140kHz±3dBPower Handing 2000W (RMS) 4000W (PEAK)Sensitivity 99dB(1W@1M)Max SPL(@1m) 143dB(PEAK/1M)LF driver 2 x18" wooferNominal impedance 8 ohmSpeaker cables LF 1(+)1(-)  HF 2(+)2(-)Connector 2×NL4MP SpeakonCabinet High Density plywoodDimensions(W x H x D) 770×570×1400mm(W×H×D)Net Weight 132kg