Subwoofer and enclosure guide
by Jordan Hale · Updated 2026-10-01
Sealed vs ported boxes, RMS matching, and how to add bass that stays musical on real roads.
Bass quality is an enclosure decision first and a cone-size decision second.
Sealed vs ported
- Sealed: generally tighter, smaller box, less total boom
- Ported: more output near the tuning frequency, needs correct box volume and port design
Matching the amp
Most sub builds are happiest on a mono amp set to the sub’s impedance (for example 1Ω or 2Ω loads, depending on the dual-voice-coil wiring). Use the sub’s RMS rating as your compass.
Vehicle constraints
Hatchbacks, trucks, and sedans load bass differently. Measure the space you are willing to lose in the cargo area before you fall in love with a huge demo box.
If you specifically want deep 12-inch options, continue to 12-inch bass upgrade notes.
FAQ
Is a 12-inch sub always better than a 10?
Not always. Enclosure design, amplifier power, and cabin space often matter more than diameter alone.
Can I put a sub under a seat?
Compact powered under-seat subs can work for mild bass upgrades. They will not replace a properly boxed sub for serious output.