Sine Design

Dayton Audio SIG150-4

woofer · EBP 116 → suits a ported box · nominal (full) — Dayton Audio datasheet (https://www.daytonaudio.com/images/resources/295-652--dayton-audio-sig150-4-spec-sheet.pdf)

Thiele/Small parameters

Fs (resonance)61.5 Hz
Qts0.49
Qes / Qms0.53 / 5.78
Vas8.7 L
Re / nominal Z3.7 Ω / 4 Ω
Xmax4.0 mm
Sensitivity87.6 dB (1 W/1 m, calc); 91.1 dB (2.83 V/1 m, mfr)
Power handling60 W

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

Datasheet (PDF) ↗ — manufacturer-hosted

Recommended enclosures

Sealed (Qtc 0.707) — Vb8.0 L
Sealed — Fc / F388.7 / 88.7 Hz
Ported (suggested) — Vb16.5 L
Ported — Fb / F350.4 / 45.5 Hz
Open in designer →Use my measured parameters →Buy at Parts Express →

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About this driver

The Dayton Audio SIG150-4 is a 5.5″ woofer with a free-air resonance of 61.5 Hz and a total Q (Qts) of 0.49. Its efficiency-bandwidth product (EBP) of 116 points toward a ported alignment. In a 8.0 L sealed box it reaches an F3 of 88.7 Hz (Qtc 0.707); a suggested 16.5 L box tuned to 50.4 Hz extends to about 45.5 Hz. See the sealed vs ported guide for how to choose.

Recommended partners

modeled estimate

The tweeters below pair well with the Dayton Audio SIG150-4 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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