P Audio X9-SUB 
Professional Powered Sound Reinforcement Subwoofer

Power Rating: 600W RMS
Frequency Response: 40-80Hz
Sensitivity: 98db
Impedance: 8 ohms
Component: 18" neodymium woofer
Cabinet: 15mm (5/8") Birch Plywood
Grill: Black powder-coated steel
Connectors: (1) XLR input, (1) XLR output
Mounting Hardware: 4 x Recessed Carrying Handle
Dimensions: 21.3" x 24" x 29.5" (540mm x 610mm x 750mm)
Weight: 110.2 lbs./50kg
Color: Black

The P Audio X9-Sub is a high-output professional active subwoofer designed to provide extended low frequency output at high sound pressure levels. The inputs are electronically balanced XLR. The X9 sub features an 80 Hz high pass filtered output for connection to a full range active top enclosure. The enclosure design is a rugged plywood construction that is covered with a very durable polyuria based coating for superior protection.