Sine Design

SB Acoustics SB29NRX75-6

subwoofer · EBP 55 → suits either box · nominal (full) — SB Acoustics datasheet (https://sbacoustics.com/wp-content/uploads/2020/02/10in-SB29NRX75-6.pdf)

Thiele/Small parameters

Fs (resonance)21 Hz
Qts0.35
Qes / Qms0.38 / 5.7
Vas102.0 L
Re / nominal Z4 Ω / 6 Ω
Xmax—
Sensitivity85.8 dB (1 W/1 m, calc); 88 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) — Vb33.1 L
Sealed — Fc / F342.4 / 42.4 Hz
Ported (suggested) — Vb63.8 L
Ported — Fb / F324.3 / 25.2 Hz
Open in designer →Use my measured parameters →Buy at Parts Express →

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About this driver

The SB Acoustics SB29NRX75-6 is a 10″ subwoofer with a free-air resonance of 21 Hz and a total Q (Qts) of 0.35. Its efficiency-bandwidth product (EBP) of 55 points toward either alignment. In a 33.1 L sealed box it reaches an F3 of 42.4 Hz (Qtc 0.707); a suggested 63.8 L box tuned to 24.3 Hz extends to about 25.2 Hz. See the sealed vs ported guide for how to choose.

Recommended partners

modeled estimate

The tweeters below pair well with the SB Acoustics SB29NRX75-6 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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