Hi All
Does anyone know the official Fb ( box tuning ) for the C-53 enclosure ?
Is it the same tuning as used in the Lancer (S) 99 ?
I have a pair of ancient S99 s . Both enclosures measure slightly different.
One's Fb is @ 44 hz while the other is about 42 hz .
And for those who want to figure out JBLs' reliance on that fiberglass insulation for virtual box volume, here are some S99 dimensions ;
The enclosure has internal measurements of 22" x 12.75" x 9" with a single 4" diameter port that is 7.25" deep . I use a displacement factor for the le14a of .15 cu' ( this is borrowed from the displacement spec given for a 2206H ). I believe the little crossover occupies about .025 cu' of internal space . I'm ignoring the le20 magnet at this time .
regards <> Earl K