Audison Prima. Audison APX 6.5. Audison AF M5.11 bit Forza Amplifier 5 Channel 4x150w + 600w 11-Ch DSP 1200w RMS. APX 6.5 features a concentric coaxial tweeter: with one single point of sound emission it is possible to obtain a consistent in-phase response, with consequent reconstruction of the acoustic scene comparable to a system of separate woofer + tweeter.The 6.5 ³ cones surround features the exclusive shallow Triple Wave profile, for maximum excursion linearity.