Black Steel Basket Non-Press Paper Cone Specially Treated Foam Surround 1.5'' 4 Layer Dual Voice Coil Dual 4 Ohm Impedance 30 OZ Magnet 300 Watts RMS / 600 Watts Max Power SPL: 89 dB Spring Loaded Push Down Speaker Terminals Dimensions: 6.6'' (Diameter) x 2.9'' (Depth) Sold as : Unit Pyle PLPW6D 6" 600 Watts Dual 4 Ohm Subwoofer Speaker