Sealed vs ported for a 12″ Dayton UM12 — HT + music?

Posted Apr 28, 2026 · 2 replies

The Listener Question Solved

Building my first sub around a Dayton UM12-22. Room is ~32 m². I want tight bass for music but also some grunt for movies.

Sealed gives me the transient response, ported the extension. Is a 0.7 Qtc sealed + EQ the move here, or should I just tune a ported box to ~22 Hz?

2 replies

eZstah Answer May 3, 2026

I ran the UM12 sealed in 60L, Qtc 0.71, then shelf-EQ +4dB below 40. Tight and goes low enough. Would not go back to ported for music.

eZstah May 2, 2026

Sealed + a bit of EQ is the easy win in that size room. Ported will need a big box to hit 22 and you fight group delay.

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