Professional audioActive line array speaker system VX series with Neodymium components is high quality, nice sound and very good price, both can bepassive or activeline array speaker: VX918S (SUBWOOFER) System Type 18"subwoofer Frequency Range(-10dB) 31Hz-220Hz Frequency Response(±3dB) 34Hz-200Hz Input Connection Modes Switchable,+1/-1 or +2/-2 Recommended Crossover Frequencies 80Hz,24dB/octave HPF; 80Hz,24dB/octave LPF Power Rating (Continuous/Program/Peak) 400W/800W/1600W Maximinal SPL 130dB SPL peak Sensitivity(1w@1m) 98dB SPL LF Driver 1×18"(457mm) Neodymium woofer Nominal Impedance 8Ω Mounting Top mounted M20 threaded socket for optional pole Suspension/Mounting Top mounted M20 threaded socket for optional pole Enclosure Rectangular,18mm,12-ply birch plywood Finish Black polyester finish Grille Powder coated,12-gauge perforated steel Dimensions(H×W×D) 508mm×597mm×749mm;(20.0in×23.5in×29.5in) Net Weight 38kg(83lb) Optional Accessories Heavy-dury pole VX Array Frame VX932LA System Type 12" two way, line array loudspeaker system Frequency Range(-10dB) 55Hz-19.5kHz Frequency Response(±3dB) 70Hz-19kHz Coverage Pattern100°×15° nominal(horizontal×vertical) Crossover Model Bi-amp/passive, externally switchable Crossover Frequency 1.3kHz Power Rating (Continuous/Program/Peak) Passive:400W/800W/1600W Bi-amp LF:300W/600W/1200W Bi-amp HF:100W/200W/400W System Maximum SPL³ 133dB SPL peak(passive) LF:130dB HF:137dB System Sensitivity(1w@1m) 101dB SPL (passive mode) LF:99dB HF:111dB LF Driver 1×350mm(12") woofer with neodymium-magnet HF Driver 1×350mm(12") woofer with neodymium-magnet Nominal ImpedancePassive:8Ω Bi-amp LF: 8ΩBi-amp HF: 8Ω Enclosure 18mm,11-ply birch plywood Suspension/Mounting Suspension requires optional VX line-array frame kit/10 eyebolt Finish Black DuraFlex finish Grille Power coated,black,16-gauge perforated steel Input Connectors2×NL4MP Speakon Dimensions(H×W×D) 350mm×595mm×375mm Net Weight 22kg (48.5lb) Gross weight 25kg