Tang Band W4-1749S
tweeter · EBP 154 → suits a ported box · nominal (full) — Tang Band datasheet (https://www.tb-speaker.com/uploads/files/80d073b84e8a35ebeb3168323f686556.pdf)
Thiele/Small parameters
| Fs (resonance) | 60 Hz |
| Qts | 0.34 |
| Qes / Qms | 0.39 / 2.98 |
| Vas | 6.3 L |
| Re / nominal Z | — / — |
| Xmax | 0.9 mm |
| Sensitivity | 88 dB (2.83 V/1 m, mfr) |
| Power handling | 25 W |
Published (nominal) values, params full — verify by measurement (DATS/REW) before building.
Datasheet (PDF) ↗ — manufacturer-hosted
Recommended enclosures
This is a tweeter; Thiele/Small box parameters are not used for enclosure design.
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About this driver
The Tang Band W4-1749S is a 4″ tweeter with a free-air resonance of 60 Hz and a total Q (Qts) of 0.34. Its efficiency-bandwidth product (EBP) of 154 points toward a ported alignment. See the sealed vs ported guide for how to choose.
Recommended partners
modeled estimateThe woofers and midranges below pair well with the Tang Band W4-1749S 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.
- Peerless by Tymphany SLS-P830668Good match· 96/100
Suggested crossover 784 Hz (4th-order, Linkwitz-Riley)
Build this pair → - Peerless by Tymphany TC9FD18-08Good match· 96/100
Suggested crossover 2.42 kHz (4th-order, Linkwitz-Riley)
Build this pair → - Seas CA18RNX H1215-08Good match· 94/100
Suggested crossover 1.25 kHz (4th-order, Linkwitz-Riley)
Build this pair → - Dayton Audio RS150T-8Good match· 93/100
Suggested crossover 1.58 kHz (4th-order, Linkwitz-Riley)
Build this pair → - Scan-Speak 18W/8531G00Good match· 92/100
Suggested crossover 1.19 kHz (4th-order, Linkwitz-Riley)
Build this pair → - Tang Band W6-1139SIFGood match· 92/100
Suggested crossover 1.25 kHz (4th-order, Linkwitz-Riley)
Build this pair →
Modeled estimate from T/S + geometry — no measurements. The verdict is robust; it improves with measured FRD/ZMA data.