Sine Design

Seas EXOTIC-F8

fullrange · EBP 64 → suits either box · nominal (full) — Seas datasheet (https://www.seas.no/images/stories/exotic/pdf_datasheet/X1-08_Exotic-F8_Datasheet.pdf)

Thiele/Small parameters

Fs (resonance)32 Hz
Qts0.44
Qes / Qms0.5 / 4.2
Vas143.0 L
Re / nominal Z5.7 Ω / 8 Ω
Xmax—
Sensitivity91.5 dB (1 W/1 m, calc); 93 dB (2.83 V/1 m, mfr)
Power handling35 W

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

Datasheet (PDF) ↗ — manufacturer-hosted

Recommended enclosures

Sealed (Qtc 0.707) — Vb90.4 L
Sealed — Fc / F351.4 / 51.4 Hz
Ported (suggested) — Vb190.4 L
Ported — Fb / F329.3 / 27.5 Hz
Open in designer →Use my measured parameters →Buy at Parts Express →

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About this driver

The Seas EXOTIC-F8 is a 8.5″ fullrange with a free-air resonance of 32 Hz and a total Q (Qts) of 0.44. Its efficiency-bandwidth product (EBP) of 64 points toward either alignment. In a 90.4 L sealed box it reaches an F3 of 51.4 Hz (Qtc 0.707); a suggested 190.4 L box tuned to 29.3 Hz extends to about 27.5 Hz. See the sealed vs ported guide for how to choose.

Recommended partners

modeled estimate

The tweeters below pair well with the Seas EXOTIC-F8 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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