Let's now look at one of the most prominent features, namely that costly Beryllium tweeter. As Mark explained, its broad surround and low-mass but large voice coil allow it to be crossed in early whilst still working with minimal distortion even at high output. For more engineering details on this premium driver, look
here. The mid/woofer too is interesting, with a cone claimed to combine the vivid musicality of cellulose drivers with the dynamics and detail of much harder metal cones. Low-loss suspensions of rubber surround and proprietary spider plus a cast aluminium basket round out the specifics. The 4
th-order filter hinge at 1'500Hz sits a good octave lower than most equivalent two-ways. Filter parts include baked edge-wound air coils and Jantzen polypropylene Alumen-Z capacitors.