Sine Design

Eminence ALPHA-5-8

fullrange · EBP 155 → suits a ported box · nominal (full) — Eminence datasheet (https://cdn.shopify.com/s/files/1/0270/8665/1462/files/Alpha_5_8.pdf)

Thiele/Small parameters

Fs (resonance)87 Hz
Qts0.54
Qes / Qms0.56 / 11.81
Vas6.2 L
Re / nominal Z5 Ω / —
Xmax5.9 mm
Sensitivity—

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 Eminence ALPHA-5-8 is a 5.5″ fullrange with a free-air resonance of 87 Hz and a total Q (Qts) of 0.54. Its efficiency-bandwidth product (EBP) of 155 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 Eminence ALPHA-5-8 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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