16cm 5 way coaxial speakers, 350W max power, 60W CEA RMS power, 2nd generation H.O.P aramid carbon fibre matrix cone woofer, Acoustic equaliser, PEI mid range diaphragm, Rubber surround with stroke stabiliser, PEI tweeter, 2 super tweeters, Heat resistant voice coil, Progressive height rate spider, Compatible with extra bass head units.