Enclosure Quick-Design Card
This is a doorway card. Use it to choose the first box path before you move into the deeper enclosure math or BassBuilder.
Qts Decision Ladder
| Qts zone | What it suggests | Starting read |
|---|---|---|
| Below 0.30 | Ported or bandpass first | Driver usually wants stronger vent loading |
| 0.30 to 0.50 | Ported often best, sealed still possible | Good crossover zone for many general builds |
| 0.50 to 0.70 | Either can work | Sealed often feels tighter, ported can still make sense |
| 0.70 to 1.00 | Sealed preferred | Driver usually wants a simpler air-spring box |
| Above 1.00 | Sealed only for most sane starts | Treat ported as suspicious unless the data clearly supports it |
Choose Sealed Or Ported
Choose Sealed
Use sealed when you want a smaller box, simpler build, tighter behavior, or the driver already leans that way.
Fast start: aim around Qtc 0.707 and use the deeper sealed page for the real sizing.
Choose Ported
Use ported when you want more output around tuning and the driver data supports a vented path.
Fast start: treat volume and tuning as a pair, then confirm port area and length with the real math.
When To Leave The Card
If the Qts ladder says the driver is a believable candidate and you want actual box dimensions next, leave this page and go into BassBuilder.