Sine Design

Seas PW165-1

woofer · EBP 98 → suits either box · nominal (full) — Seas datasheet (https://www.seas.no/images/stories/lotus/pdfdataheet/pw1651_l0018-04s.pdf)

Thiele/Small parameters

Fs (resonance)64 Hz
Qts0.58
Qes / Qms0.65 / 5.49
Vas8.0 L
Re / nominal Z3.3 Ω / 4 Ω
Xmax—
Sensitivity86.9 dB (1 W/1 m, calc)

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

Datasheet (PDF) ↗ — manufacturer-hosted

Recommended enclosures

Sealed (Qtc 0.707) — Vb16.5 L
Sealed — Fc / F378.0 / 78.0 Hz
Ported (suggested) — Vb26.5 L
Ported — Fb / F344.1 / 38.4 Hz
Open in designer →Use my measured parameters →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 Seas PW165-1 is a 6″ woofer with a free-air resonance of 64 Hz and a total Q (Qts) of 0.58. Its efficiency-bandwidth product (EBP) of 98 points toward either alignment. In a 16.5 L sealed box it reaches an F3 of 78.0 Hz (Qtc 0.707); a suggested 26.5 L box tuned to 44.1 Hz extends to about 38.4 Hz. See the sealed vs ported guide for how to choose.

Recommended partners

modeled estimate

The tweeters below pair well with the Seas PW165-1 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 woofers