Sine Design

Tang Band W57-1781

subwoofer · EBP 133 → suits a ported box · nominal (full) — Tang Band datasheet (https://www.tb-speaker.com/uploads/files/267e70e89adbc46e2286af388400b600.pdf)

Thiele/Small parameters

Fs (resonance)40 Hz
Qts0.27
Qes / Qms0.3 / 2.12
Vas26.0 L
Re / nominal Z— / —
Xmax3.0 mm
Sensitivity—
Power handling50 W

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

Datasheet (PDF) ↗ — manufacturer-hosted

Recommended enclosures

T/S are full — fetch the datasheet for the full parameters to model a box.

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About this driver

The Tang Band W57-1781 is a 6.5″ subwoofer with a free-air resonance of 40 Hz and a total Q (Qts) of 0.27. Its efficiency-bandwidth product (EBP) of 133 points toward a ported alignment. See the sealed vs ported guide for how to choose.

Recommended partners

modeled estimate

The tweeters below pair well with the Tang Band W57-1781 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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