1800 Watts Max 900 Watts RMS Frequency Response: 18-800Hz Sensitivity: 90dB 3? 4-LAYER Dual 4 Ohm Voice Coils Woven Tinsel Leads Foam Surround Stitched to Composite Cone Patent Pipe Multi-Connect Terminal High Power Strontium Magnets Vented Motor Structure Powder Black Cast Aluminum Basket 160 Oz. Double Stacked Magnet Sold Individually Mounting Depth: 8-1/4"