Sine Design

Wavecor WF120BD05

midwoofer · EBP 116 → suits a ported box · nominal (full) — Wavecor datasheet (https://www.wavecor.com/Driver%20specifications%20PDF/WF120BD05_06_09_10_specifications.pdf)

Thiele/Small parameters

Fs (resonance)52 Hz
Qts0.43
Qes / Qms0.45 / 7.9
Vas5.3 L
Re / nominal Z3.2 Ω / 4 Ω
Xmax4.0 mm
Sensitivity84.0 dB (1 W/1 m, calc); 87 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) — Vb3.1 L
Sealed — Fc / F385.5 / 85.5 Hz
Ported (suggested) — Vb6.5 L
Ported — Fb / F348.7 / 46.2 Hz
Open in designer →Use my measured parameters →Buy at Parts Express →

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About this driver

The Wavecor WF120BD05 is a 4″ midwoofer with a free-air resonance of 52 Hz and a total Q (Qts) of 0.43. Its efficiency-bandwidth product (EBP) of 116 points toward a ported alignment. In a 3.1 L sealed box it reaches an F3 of 85.5 Hz (Qtc 0.707); a suggested 6.5 L box tuned to 48.7 Hz extends to about 46.2 Hz. See the sealed vs ported guide for how to choose.

Recommended partners

modeled estimate

The tweeters below pair well with the Wavecor WF120BD05 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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