General features 2-way coaxial 250W Peak / 30W RMS Power Frequency Response: 40 - 22,000Hz Sound Pressure Level: 91dB / Wm 13 cm (5-1 / 4 ") Mica Cone Woofer 2.5cm balanced dome tweeter Ferrite magnet (woofer) Neodymium magnet (tweeter) Hybrid Surround Mounting Depth: 43.5 mm (1-23 / 32 ") CS-J520X - Speakers Woofer Dimensions 13 cm Diaphragm Cone Mica Surround Hybrid Surround (Rubber and Textile) Magnet Ferrite magnet Tweeter Dimensions 2.5 cm Guy Balanced Diaphragm Poly-Ether Imide GENERAL FEATURES Power Handling Capacity (RMS power) 30 W Power handling capability (peak power) 250W Frequency response 40 - 22,000Hz Impedance 4 ohm Sound pressure level 91dB / Wm Weight Weight (without grill) 0.34kg (0.75lbs) Magnet ground 102g (3.6oz) Mounting depth 43.5mm (1-23 / 32 ")