Sine Design

Eminence BETA-10CX

woofer · EBP 120 → suits a ported box · nominal (full) — Eminence datasheet (https://cdn.shopify.com/s/files/1/0270/8665/1462/files/Beta_10CX.pdf)

Thiele/Small parameters

Fs (resonance)49 Hz
Qts0.38
Qes / Qms0.41 / 6.16
Vas61.2 L
Re / nominal Z5.48 Ω / 8 Ω
Xmax5.0 mm
Sensitivity94.3 dB (1 W/1 m, calc); 94.3 dB (2.83 V/1 m, mfr)

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

Datasheet (PDF) ↗ — manufacturer-hosted

Recommended enclosures

Sealed (Qtc 0.707) — Vb24.8 L
Sealed — Fc / F391.2 / 91.2 Hz
Ported (suggested) — Vb50.2 L
Ported — Fb / F352.1 / 52.2 Hz
Open in designer →Use my measured parameters →Buy at Parts Express →

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About this driver

The Eminence BETA-10CX is a 10.5″ woofer with a free-air resonance of 49 Hz and a total Q (Qts) of 0.38. Its efficiency-bandwidth product (EBP) of 120 points toward a ported alignment. In a 24.8 L sealed box it reaches an F3 of 91.2 Hz (Qtc 0.707); a suggested 50.2 L box tuned to 52.1 Hz extends to about 52.2 Hz. See the sealed vs ported guide for how to choose.

Recommended partners

modeled estimate

The tweeters below pair well with the Eminence BETA-10CX 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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