Sine Design

Dayton Audio RS75T-8

fullrange · EBP 167 → suits a ported box · nominal (full) — Dayton Audio datasheet (https://www.daytonaudio.com/images/resources/295-336--dayton-audio-rs75t-8-spec-sheet.pdf)

Thiele/Small parameters

Fs (resonance)189 Hz
Qts0.95
Qes / Qms1.13 / 5.84
Vas0.2 L
Re / nominal Z6.1 Ω / 8 Ω
Xmax1.3 mm
Sensitivity83.0 dB (1 W/1 m, calc); 84.3 dB (2.83 V/1 m, mfr)
Power handling15 W

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

Datasheet (PDF) ↗ — manufacturer-hosted

Recommended enclosures

Sealed (Qtc 0.707) — VbInfinity L
Sealed — Fc / F3189.0 / 152.3 Hz
Ported (suggested) — Vb3.7 L
Ported — Fb / F378.7 / 72.4 Hz
Open in designer →Use my measured parameters →Buy at Parts Express →

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About this driver

The Dayton Audio RS75T-8 is a 2″ fullrange with a free-air resonance of 189 Hz and a total Q (Qts) of 0.95. Its efficiency-bandwidth product (EBP) of 167 points toward a ported alignment. In a Infinity L sealed box it reaches an F3 of 152.3 Hz (Qtc 0.707); a suggested 3.7 L box tuned to 78.7 Hz extends to about 72.4 Hz. See the sealed vs ported guide for how to choose.

Recommended partners

modeled estimate

The tweeters below pair well with the Dayton Audio RS75T-8 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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