It is a single 18" subwoofer and a low sound box, mainly suitable for the room insufficient bass .
Detailed introduction to TA-118B Low-frequency loudspeaker system:
SINGLE18"SUB-BASS SPEAKER SYSTEM
Nominal power 500W(MAX/500W)
Frequency Range 30-500KHz(±3dB)
Nominal impedence 8Ω
Sensitivity 98dB/1W/1M
Drivet complement 18"
Dimensions (H x W x D)750x560x710(mm)
Box Material Plywood