Disclaimer: A Chapter Before This

"We tried very hard to feature full-range speakers in our speaker section, but the real challenge lies in the fact that most full-range drivers, especially those above 5 inches, suffer from severe mechanical cone breakup issues, producing harsh, ear-piercing tones when the cone can't catch up with the speed of the inner cone that attached to the voice coil. As a result, we have abandoned our full-range speaker development."