Sine Design

Eminence DELTA-PRO-12A

fullrange · EBP 138 → suits a ported box · nominal (full) — Eminence datasheet (https://cdn.shopify.com/s/files/1/0270/8665/1462/files/Delta_Pro_12A.pdf)

Thiele/Small parameters

Fs (resonance)51 Hz
Qts0.35
Qes / Qms0.37 / 7.56
Vas81.8 L
Re / nominal Z5.71 Ω / 8 Ω
Xmax4.6 mm
Sensitivity96.5 dB (1 W/1 m, calc); 99.2 dB (2.83 V/1 m, mfr)

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

Datasheet (PDF) ↗ — manufacturer-hosted

Recommended enclosures

Sealed (Qtc 0.707) — Vb26.6 L
Sealed — Fc / F3103.0 / 103.0 Hz
Ported (suggested) — Vb51.2 L
Ported — Fb / F359.0 / 61.3 Hz
Open in designer →Use my measured parameters →Buy at Parts Express →

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About this driver

The Eminence DELTA-PRO-12A is a 13″ fullrange with a free-air resonance of 51 Hz and a total Q (Qts) of 0.35. Its efficiency-bandwidth product (EBP) of 138 points toward a ported alignment. In a 26.6 L sealed box it reaches an F3 of 103.0 Hz (Qtc 0.707); a suggested 51.2 L box tuned to 59.0 Hz extends to about 61.3 Hz. See the sealed vs ported guide for how to choose.

Recommended partners

modeled estimate

The tweeters below pair well with the Eminence DELTA-PRO-12A 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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