General features 2-way coaxial 210W Peak / 21W RMS Power Frequency Response: 45 - 22,000Hz Sound Pressure Level: 90dB / Wm 10 cm (4 ") Mica Cone Woofer 2.5cm balanced dome tweeter Ferrite magnet (woofer) Neodymium magnet (tweeter) Hybrid Surround Mounting Depth: 43.1 mm (1-23 / 32 ") Technical specifications Product support CS-J420X - Speakers Woofer Dimensions 10 cm Diaphragm Cone Mica Surround Hybrid Surround (Rubber and Textile) Magnet Ferrite magnet Tweeter Dimensions 2.5 cm Balanced Diaphragm Poly-Ether Imide GENERAL FEATURES Power Handling Capacity (RMS power) Power handling capability (peak power) Frequency response 45 - 22,000Hz Impedance 4 ohm Sound pressure level 90dB / Wm Weight Weight (without grill) 0.23kg (0.51lbs) Magnet ground 74g (2.6oz) Mounting depth 43.1 mm (1-23 / 32 "