Dayton Audio RS28F-4
tweeter · EBP 545 → suits a ported box · nominal (headline) — Dayton Audio RS28F-4 spec sheet (manufacturer)
Thiele/Small parameters
| Fs (resonance) | 545 Hz |
| Qts | 0.7 |
| Qes / Qms | 1 / 2.3 |
| Vas | — |
| Re / nominal Z | 2.8 Ω / 4 Ω |
| Xmax | — |
| Sensitivity | 88 dB (2.83 V/1 m, mfr) |
| Power handling | 100 W |
Published (nominal) values, params headline — verify by measurement (DATS/REW) before building. datasheet
Recommended enclosures
This is a tweeter; Thiele/Small box parameters are not used for enclosure design.
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About this driver
The Dayton Audio RS28F-4 is a 1.1″ tweeter with a free-air resonance of 545 Hz and a total Q (Qts) of 0.7. Its efficiency-bandwidth product (EBP) of 545 points toward a ported alignment. See the sealed vs ported guide for how to choose.
NOMINAL/manufacturer. Fs 545 Hz; Re 2.8; Qts 0.70; 88 dB; 100 W; recommended crossover ~1200-1500 Hz (low-Fs rear chamber). Sd/Xmax/Vas/BL/Mms NOT on the Dayton spec sheet (null). NOTE: distinct from RST28F-4 (PE 275-141, Fs 710, 93.5 dB) - retailer mirrors conflate the two; values here are for the original RS28F-4 (PE 275-140). MED confidence (manufacturer PDF not directly reachable; verified via Dayton product page + audiophonics datasheet table).
Recommended partners
modeled estimateThe woofers and midranges below pair well with the Dayton Audio RS28F-4 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 TC9FD18-08Good match· 96/100
Suggested crossover 2.42 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 → - Seas CA18RNX H1215-08Good match· 92/100
Suggested crossover 1.25 kHz (4th-order, Linkwitz-Riley)
Build this pair → - Tang Band W5-1611SAFGood match· 89/100
Suggested crossover 1.51 kHz (4th-order, Linkwitz-Riley)
Build this pair → - Tang Band W6-1139SIFGood match· 89/100
Suggested crossover 1.25 kHz (4th-order, Linkwitz-Riley)
Build this pair → - Scan-Speak 18W/8531G00Good match· 88/100
Suggested crossover 1.19 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.