Woah.
This is that shit that I love! Proper box design! I have heard nothing but good things about Fi subs. I myself am going with either a Sundown X-15 or SSA Icon 15 myself for my build (when I get there). 30 hz is LOW, that's why I wanna go at least 15" myself at 31 hz when I build my box. Yours is gonna be an absolute monster when it's done, keep the progress coming!
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