This 2-way component features AP 1 tweeter and AP 6.5 Woofer & APCX TW crossover providing the ability to adapt its response to its two main applications. Audison Prima 1 tweeter features a 26 mm diameter emission diaphragm, an acoustic lens designed to compensate for the frequency response within the 10kHz – 13kHz range, a Neodymium REN magnet and extremely small sized dedicated passive crossover. Audsion’S Prima 6.5 feature a 32 mm pure copper voice coil, for high power handling and outstanding low frequency control. All the woofer don’T employ any filter, to maximize efficiency: the dome profile has been optimised with Klippel R&D Scan Vibrometer to obtain a calibrated mechanical low-pass cut-off frequency. The surround features the exclusive shallow “Triple Wave” Profile, for maximum excursion linearity. Got my ICE workshop to fine tune my whole sound system for me. Music now in the ride is totally awesome. Sound produce is really quality and clean.