Which, for a tline, is going to offer much, much more in the way of output below that fundemental resonance. You will still be digging very deep with that. That's a lot of cross section, though! Did you go with a taper and increased fill or what? Either way, I like your style. Two 15's in a TL, that's awesome. lolI actually have 2 15's Iin a tline in my Xtra cab Silverado tuned to 31.5hz.
