I made a video of candy shop last nite with the top 2 subs, left one is blown but still going, bottom 2 are seazed: coil on top plate... so I disconnected them from the amps. Got all four blue lights, amps are OK.
"put on" 148.2 LP set to 31.5Hz, HP set to 20Hz... only wanted the low note. clipping is terrible, not bad for needing 2 more HO alts and 4 more batteries!
132.5 15Hz 136.7 17Hz 140.3 18Hz 142.5 19Hz 143.8 20Hz 144.9 21Hz 145.7 22Hz Terrible clipping, not as bad from 23Hz on up, but 15Hz-22Hz was massive clipping. So now I need 2 more HO alts and 4 more batteries. 4 Fi IB3 18's, 50 cubic feet, 20" diameter port 18" long for a 23Hz tune (more like 55 cubic feet 20Hz tune, but I'll do impedance sweeps later to get exact)
147.7 23Hz hair trick unintentional
My resonant frequancy appeared to be 43Hz and 63Hz, according to the Tem Lab operator...but I think that was just harmonics he was going by. We never got to make a sweep, I wonder if I could get in the 50's up high where it gets real loud.