Sine Design

SB Acoustics SATORI WO24TX-4

subwoofer · EBP 71 → suits either box · nominal (full) — SB Acoustics datasheet (https://sbacoustics.com/wp-content/uploads/2024/04/9.5in-SATORI-WO24TX-4.pdf)

Thiele/Small parameters

Fs (resonance)26.3 Hz
Qts0.35
Qes / Qms0.37 / 5.66
Vas79.0 L
Re / nominal Z3.3 Ω / 4 Ω
Xmax—
Sensitivity87.7 dB (1 W/1 m, calc); 91 dB (2.83 V/1 m, mfr)
Power handling90 W

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

Datasheet (PDF) ↗ — manufacturer-hosted

Recommended enclosures

Sealed (Qtc 0.707) — Vb25.6 L
Sealed — Fc / F353.1 / 53.1 Hz
Ported (suggested) — Vb49.4 L
Ported — Fb / F330.4 / 31.6 Hz
Open in designer →Use my measured parameters →Buy at Parts Express →

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About this driver

The SB Acoustics SATORI WO24TX-4 is a 9″ subwoofer with a free-air resonance of 26.3 Hz and a total Q (Qts) of 0.35. Its efficiency-bandwidth product (EBP) of 71 points toward either alignment. In a 25.6 L sealed box it reaches an F3 of 53.1 Hz (Qtc 0.707); a suggested 49.4 L box tuned to 30.4 Hz extends to about 31.6 Hz. See the sealed vs ported guide for how to choose.

Recommended partners

modeled estimate

The tweeters below pair well with the SB Acoustics SATORI WO24TX-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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