Quote Originally Posted by voice of the theater View Post
You learn something every day (hopefully). I always thought a biflex woofer would have some kind of "special" (unique) motor..... I have no clue as to how those biflex woofers work/what they actually do as far as the two cone sections etc.....
Nope, just a small diaphragm suspended in a large one. At low frequencies they act ~ as one and as the frequency increases to the point where a regular woofer would be rolling off, the smaller diaphragm starts taking over since it has a lower mass and more compliant suspension best suited for the higher octaves. Ultimately, it's the 'woofer's' big VC that sets its rather 'lean' HF response and why it needs a super tweeter.

GM