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Guides
Plain explanations of the numbers that decide how a sub box sounds, so you can choose a box with confidence or send us a better custom order.
Work out the net air space of a box from its outside dimensions, wall thickness and displacement.
How each design sounds, how much space it needs, and which suits your vehicle and music.
Fs, Qts, Vas, Xmax, RMS power and mounting depth, and what each one means for the box.
What tuning frequency does, how port size and length set it, with a port length calculator.
Behind-seat and under-seat boxes by cab type, how to measure, and vehicle-specific vs universal.
Have a question the guides don’t answer? Call or text (785) 430-0822.
