Quote Originally Posted by VolvoHeretic View Post
That's interesting GM, I only know that I play mine with no sub-fequency filters, and the EQ pegged at +12db at the bottom, and you can see and almost count the warped record wow as in wow and flutter from the Technics SL1800 TT, and the woofer was moving a LOT.
Must be nice, I've seen enough 416s, 515s trashed from high power/over excursion in both reflex and 825 cabs back when high power SS amps came along to ensure mine never have to work hard to play loud.

Warped records, TT 'rumble' move the woofer slowly enough in a sine-wave for rising rate suspensions and lowering BL due to the VC leaving the gap to compensate, but high amplitude ['fast'] transients in the ~60-160 Hz BW can cause excessive overshoot. I imagine 'old guy' has a few stories to tell.........

GM