loudspeaker 1.18" Two-way Passive Sub-bass 2.specially designed for bars and slow dancing bar ... , clubs etc. entertainment venues Product Parameters: ModelS-18+System18" Passive Sub-bassFrequency Response45Hz-200Hz ±3dBRated Power600W, 2400W PeakSensitivity(1w/1m)101dBMaximum ... .W: 47.2kg, G.W: 53kg High quality 18" Passive Sub-bass loudspeaker