Applications:It is sophisticated designed and ideal for Theaters, Music Halls, Large Discotheques, Night Clubs, KTV rooms, touring events,Stage Monitors etc.  The BA218 high performance active sub woofer adopts dual 18"  high power 1000W woofer, with one high-power Class D amplifier module 2500W @4Ω, which makes the output power up to 2500W. There is a built-in DSP audio processor that can operate a full parameter setting according to different applications. And there are LCD display which can select the different pre sets. The cabinet of BA218 adopts vented design, so it has excellent performance in strength, depth, elasticity and transmission distance.is designed to meet the high requirements of touring performance, rental and fixed installation.BA218 is a perfect match for all our full range speakers, extending band width of frequency response and delivering powerful, impressive, punchy bass sound.BA218  is combined in modularization, which is suitable for any performance venues. It can also be usedtogether with other speakers of other brands. ModelBA218TypeDual 18" High-Performance Active Sub bassFrequency response40Hz-150Hz±3dBPower Handing2000W (RMS) 4000W(PEAK)Sensitivity99dB(1W@1M)Max SPL(@1m)131dB(PEAK/1M)LF driver2 x 18"(460mm) wooferNominal impedance4 ohmActive Amp2500W RMS;( USB Port, LCD Display,preset select button,Inbuilt DSP)Speaker cablesLF 1(+)1(-)  HF 2(+)2(-)Connector2× NeutrikNL4 SpeakonCabinetHigh Density plywoodDimensions(W x H x D)570×1068×780mm(W×H×D)Net Weight49kg