Sine Design

Dayton Audio PA380-8

woofer · EBP 117 → suits a ported box · nominal (full) — Dayton Audio datasheet (https://www.daytonaudio.com/images/resources/295-034-dayton-audio-pa380-8-specifications-46884.pdf)

Thiele/Small parameters

Fs (resonance)31.6 Hz
Qts0.27
Qes / Qms0.27 / 12.2
Vas175.0 L
Re / nominal Z6.3 Ω / 8 Ω
Xmax5.0 mm
Sensitivity94.9 dB (1 W/1 m, calc); 96.1 dB (2.83 V/1 m, mfr)
Power handling500 W

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

Datasheet (PDF) ↗ — manufacturer-hosted

Recommended enclosures

Sealed (Qtc 0.707) — Vb29.9 L
Sealed — Fc / F382.7 / 82.8 Hz
Ported (suggested) — Vb46.5 L
Ported — Fb / F347.7 / 56.0 Hz
Open in designer →Use my measured parameters →Buy at Parts Express →

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About this driver

The Dayton Audio PA380-8 is a 16″ woofer with a free-air resonance of 31.6 Hz and a total Q (Qts) of 0.27. Its efficiency-bandwidth product (EBP) of 117 points toward a ported alignment. In a 29.9 L sealed box it reaches an F3 of 82.8 Hz (Qtc 0.707); a suggested 46.5 L box tuned to 47.7 Hz extends to about 56.0 Hz. See the sealed vs ported guide for how to choose.

Recommended partners

modeled estimate

The tweeters below pair well with the Dayton Audio PA380-8 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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