Sine Design

Tang Band W2-2181S

fullrange · EBP 279 → suits a ported box · nominal (full) — Tang Band datasheet (https://www.tb-speaker.com/uploads/files/7a977d38753c12006c27adfa9d729c83.pdf)

Thiele/Small parameters

Fs (resonance)120 Hz
Qts0.34
Qes / Qms0.43 / 1.61
Vas0.2 L
Re / nominal Z— / —
Xmax2.0 mm
Sensitivity82 dB (2.83 V/1 m, mfr)
Power handling10 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 W2-2181S is a 2″ fullrange with a free-air resonance of 120 Hz and a total Q (Qts) of 0.34. Its efficiency-bandwidth product (EBP) of 279 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 W2-2181S 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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