Seas W12CY001
woofer · EBP 107 → suits a ported box · nominal (full) — Seas datasheet (https://www.seas.no/images/stories/excel/pdfdataheet/e0021_w12cy001_datasheet.pdf)
Thiele/Small parameters
| Fs (resonance) | 45 Hz |
| Qts | 0.36 |
| Qes / Qms | 0.42 / 2.5 |
| Vas | 6.0 L |
| Re / nominal Z | — / 8 Ω |
| Xmax | — |
| Sensitivity | 83.0 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) — Vb | 2.1 L |
| Sealed — Fc / F3 | 88.4 / 88.4 Hz |
| Ported (suggested) — Vb | 4.1 L |
| Ported — Fb / F3 | 50.6 / 51.9 Hz |
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About this driver
The Seas W12CY001 is a woofer with a free-air resonance of 45 Hz and a total Q (Qts) of 0.36. Its efficiency-bandwidth product (EBP) of 107 points toward a ported alignment. In a 2.1 L sealed box it reaches an F3 of 88.4 Hz (Qtc 0.707); a suggested 4.1 L box tuned to 50.6 Hz extends to about 51.9 Hz. See the sealed vs ported guide for how to choose.
Recommended partners
modeled estimateThese tweeters could pair with the Seas W12CY001 in a two-way design, but the seed Thiele/Small data is too thin to grade the match yet — add or measure T/S (Fs, Sd, Xmax) to compute a real compatibility grade. You can still open a pair in the guided builder.
- Dayton Audio AMT-Mini-8Insufficient data to grade
Crossover not modelable yet — tweeter needs published Thiele/Small data.
Build this pair → - Dayton Audio AMT2-4Insufficient data to grade
Crossover not modelable yet — tweeter needs published Thiele/Small data.
Build this pair → - Dayton Audio AMT3-4Insufficient data to grade
Crossover not modelable yet — tweeter needs published Thiele/Small data.
Build this pair → - Dayton Audio AMTPOD-4Insufficient data to grade
Crossover not modelable yet — tweeter needs published Thiele/Small data.
Build this pair → - Dayton Audio AMTPRO-4Insufficient data to grade
Crossover not modelable yet — tweeter needs published Thiele/Small data.
Build this pair → - Dayton Audio AN25F-4Insufficient data to grade
Crossover not modelable yet — tweeter needs published Thiele/Small data.
Build this pair →
Modeled estimate from T/S + geometry — no measurements. The verdict is robust; it improves with measured FRD/ZMA data.