Sine Design

Faital Pro 8PR155

woofer · EBP 218 → suits a ported box · nominal (full) — Faital Pro datasheet (https://faitalpro.com/products/files/8PR155/8/8PR155_datasheet_8.pdf)

Thiele/Small parameters

Fs (resonance)85 Hz
Qts0.37
Qes / Qms0.39 / 8.8
Vas9.4 L
Re / nominal Z5.3 Ω / 8 Ω
Xmax3.6 mm
Sensitivity93.5 dB (1 W/1 m, calc); 97 dB (2.83 V/1 m, mfr)
Power handling200 W

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

Datasheet (PDF) ↗ — manufacturer-hosted

Recommended enclosures

Sealed (Qtc 0.707) — Vb3.5 L
Sealed — Fc / F3162.4 / 162.4 Hz
Ported (suggested) — Vb7.1 L
Ported — Fb / F392.9 / 94.1 Hz
Open in designer →Use my measured parameters →Buy at Parts Express →

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About this driver

The Faital Pro 8PR155 is a 8″ woofer with a free-air resonance of 85 Hz and a total Q (Qts) of 0.37. Its efficiency-bandwidth product (EBP) of 218 points toward a ported alignment. In a 3.5 L sealed box it reaches an F3 of 162.4 Hz (Qtc 0.707); a suggested 7.1 L box tuned to 92.9 Hz extends to about 94.1 Hz. See the sealed vs ported guide for how to choose.

Recommended partners

modeled estimate

The tweeters below pair well with the Faital Pro 8PR155 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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