Learn
Why Subs Need a Box
The front and back of a cone fight each other. Here's why bass vanishes without a box, and how big a board would have to be instead.
Sealed, Ported and Free Air
The main ways to mount a sub, what each one is good at, and how a vehicle changes the picture.
Resonance and Impedance
What a sub's resonance is, why a box raises it, and why a 2 ohm sub isn't 2 ohms at every note.
How a Port Works
Why a ported box gets loud at one note, what makes it tune lower or higher, and how to check where yours really tunes.
Check Your Tuning With an Impedance Sweep
Measure where your finished box really tunes, and find air leaks, before you ever hit the meter.
Box Size, Loudness and Decibels
Small, loud or low: pick two. Plus what a decibel really is and how much power each extra dB costs.
Building a Box That Doesn't Flex
Wood, wall thickness, bracing and sealing for a box that holds up to competition power.
Stuffing and Damping
What fill inside a box does, when it helps, when it hurts, and a quick test you can do with a battery.
The SPL Ladder
From a quiet room to the loudest cars in Bass Wars: what each step on the dB scale sounds and feels like.
Polarity and Phase
Why one sub wired backwards can cancel the others, and how to check every sub is pushing together.