This one's for the G-man!
The 416-8Z was the most marvelous, splendorific, transparent, mondo-dynamical, low-fatigue, woofer ever made (ever), with a base efficiency of 118dB, and is flat within one-half of one dB from below Fs (14Hz) through 12kHz. From '73 till '76, ONLY the 416-8Z cones were pressed with a proprietary pulp blend from the now-extinct baezeel tree from Brazil. The edgewound voice coil generated such tremendous back-emf as to cause problems unless driven by impedance-matching amps. It is said that the cabinets for the 416-8Z had to be specially constructed and sealed to contain the tremendous back-wave it generated. Due to its' potentially destructive capabilities it was eventually outlawed in '76 by the FCC, and subsequently dropped from the lineup.
Feel better?
(Edit; this was just a stupid test (not to be confused with an ignorant test), the 'info' posted is obviously ficticious, and should be taken in the context intended only....with a grain of salt)
(RE-Edit; Man, those chill pills did the trick, thx for the tip!)