Sine Design

Faital Pro 8PR320

woofer · EBP 151 → suits a ported box · nominal (full) — Faital Pro datasheet (https://faitalpro.com/products/files/8PR320/8/8PR320_datasheet_8.pdf)

Thiele/Small parameters

Fs (resonance)65 Hz
Qts0.41
Qes / Qms0.43 / 8.2
Vas13.1 L
Re / nominal Z5.4 Ω / 8 Ω
Xmax7.3 mm
Sensitivity91.1 dB (1 W/1 m, calc); 95 dB (2.83 V/1 m, mfr)
Power handling300 W

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

Datasheet (PDF) ↗ — manufacturer-hosted

Recommended enclosures

Sealed (Qtc 0.707) — Vb6.6 L
Sealed — Fc / F3112.1 / 112.1 Hz
Ported (suggested) — Vb13.8 L
Ported — Fb / F363.9 / 61.9 Hz
Open in designer →Use my measured parameters →Buy at Parts Express →

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About this driver

The Faital Pro 8PR320 is a 8.5″ woofer with a free-air resonance of 65 Hz and a total Q (Qts) of 0.41. Its efficiency-bandwidth product (EBP) of 151 points toward a ported alignment. In a 6.6 L sealed box it reaches an F3 of 112.1 Hz (Qtc 0.707); a suggested 13.8 L box tuned to 63.9 Hz extends to about 61.9 Hz. See the sealed vs ported guide for how to choose.

Recommended partners

modeled estimate

The tweeters below pair well with the Faital Pro 8PR320 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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