OK , let get techy
A RF sub with 100 watts might only get 87db'* out of the same enclosure. While the pyramid gets 97 db'*. The cheaper one uses cheap cone material , which is lighter, paper also retains it'* shape at low power levels . At the same time at HIGH power levels , the RF would retain it'* shape and still keep it'* low db rating whie the pyramid would just break.
If we are all on the same topic "entry level" let'* use some examples
Pyramid : 1.5 inch vc , light weight paper cone , vented pole , ok mag and reg contacts, foam surround and standard spiderweb suspension . PRICE 25.00
Pioneer 1.5 inch vc heavy poly cone , vented pole ok mag reg contacts foam surround and standard spiderweb suspension . PRICE 100.00 +
RF , same crap above , 100.00+
Do you guys understand or should I post the fact sheets?