CS-J1720X 17cm (6-3/4') 2-Way Coaxial Speakers Features: 2-Way Coaxial 300W Peak/30W RMS Power Frequency Response: 30 - 22,000Hz Sound Pressure Level: 92dB/W.m 17cm (6-3/4'') Mica Cone Woofer 2.5cm (1'') Poly-Ether Imide Balanced Tweeter Ferrite Magnet (Woofer) Neodymium Magnet (Tweeter) Hybrid Surround Mounting Depth: 44 mm (1-3/4'') Specifications: Size 17 cm (6-3/4') Diaphragm Mica Cone Surround Hybrid Surround Magnet Ferrite Tweeter Size 2.5 cm (1') Type Balanced Diaphragm Poly-Ether Imide Magnet Neodimium Frequency Response 30 - 22,000Hz Power Handling Capacity (RMS) 30W Power Handling Capacity (Peak Power) 300W Impedance 4 ohms Sound Pressure Level 92dB/W.m Weight Weight (w/o Grille) 0.37kg (0.82lbs) Magnet Mass 102g (3.6oz) Mounting Depth 44 mm (1-3/4")