Sine Design

Eminence KAPPA-PRO-18LF2

subwoofer · EBP 94 → suits either box · nominal (full) — Eminence datasheet (https://cdn.shopify.com/s/files/1/0270/8665/1462/files/Kappa_Pro_18LF_8.pdf)

Thiele/Small parameters

Fs (resonance)32 Hz
Qts0.33
Qes / Qms0.34 / 10.66
Vas391.6 L
Re / nominal Z5.39 Ω / —
Xmax8.0 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.

Buy at Parts Express →

Affiliate disclosure: some links are affiliate links and we may earn a commission on qualifying purchases at no extra cost to you. Prices are estimates at the time of writing; verify on the retailer's site.

About this driver

The Eminence KAPPA-PRO-18LF2 is a 19″ subwoofer with a free-air resonance of 32 Hz and a total Q (Qts) of 0.33. Its efficiency-bandwidth product (EBP) of 94 points toward either alignment. See the sealed vs ported guide for how to choose.

Recommended partners

modeled estimate

The tweeters below pair well with the Eminence KAPPA-PRO-18LF2 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.

Related subwoofers