That cone should help with off-axis beaming issues. //content.invisioncic.com/y282845/emoticons/crazy.gif.c13912c32de98515d3142759a824dae7.gif
Those motors are sexy though. And talk about cooling! They're like huge industrial fans when you're testing them on the test bench. //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif
And if you're asking about an under-hung version with dual 1 Ohm coils for "Sound Quality" at 1500+ watts, you're not really asking about "Sound Quality" in its pure form //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif Sounding really good while doing 150+ dB is what the current stock NS and Z versions already accomplish without modifying the motor/coil type and/or configuration.