Sine Design

Dayton Audio UMII15-22

subwoofer · EBP 29 → suits a sealed box · nominal (full) — Dayton Audio datasheet (https://www.daytonaudio.com/images/resources/295-714--dayton-audio-UMII15-22-spec-sheet.pdf)

Thiele/Small parameters

Fs (resonance)29 Hz
Qts0.7
Qes / Qms1 / 2.34
Vas96.0 L
Re / nominal Z4.2 Ω / 2 Ω
Xmax24.0 mm
Sensitivity85.5 dB (1 W/1 m, calc); 88.5 dB (2.83 V/1 m, mfr)
Power handling900 W

Published (nominal) values, params full — verify by measurement (DATS/REW) before building.

Datasheet (PDF) ↗ — manufacturer-hosted

Recommended enclosures

Sealed (Qtc 0.707) — Vb4776.1 L
Sealed — Fc / F329.3 / 29.3 Hz
Ported (suggested) — Vb591.7 L
Ported — Fb / F316.5 / 20.0 Hz
Open in designer →Use my measured parameters →Buy at Parts Express →

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About this driver

The Dayton Audio UMII15-22 is a 15.5″ subwoofer with a free-air resonance of 29 Hz and a total Q (Qts) of 0.7. Its efficiency-bandwidth product (EBP) of 29 points toward a sealed alignment. In a 4776.1 L sealed box it reaches an F3 of 29.3 Hz (Qtc 0.707); a suggested 591.7 L box tuned to 16.5 Hz extends to about 20.0 Hz. See the sealed vs ported guide for how to choose.

Recommended partners

modeled estimate

The tweeters below pair well with the Dayton Audio UMII15-22 in a two-way design — each grade is a modeled estimate of the crossover match, with a suggested crossover point. Open any pair in the guided builder to design the crossover and total the parts.

Modeled estimate from T/S + geometry — no measurements. The verdict is robust; it improves with measured FRD/ZMA data.

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