Sine Design

Dayton Audio CF18N-4

tweeter · EBP 355 → suits a ported box · nominal (partial) — Dayton Audio datasheet (https://www.daytonaudio.com/images/resources/275-411--dayton-audio-cf18n-4-spec-sheet.pdf)

Thiele/Small parameters

Fs (resonance)1100 Hz
Qts1.2
Qes / Qms3.1 / 2
Vas—
Re / nominal Z3.54 Ω / 4 Ω
Xmax—
Sensitivity90 dB (2.83 V/1 m, mfr)
Power handling40 W

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

Datasheet (PDF) ↗ — manufacturer-hosted

Recommended enclosures

This is a tweeter; Thiele/Small box parameters are not used for enclosure design.

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About this driver

The Dayton Audio CF18N-4 is a 1″ tweeter with a free-air resonance of 1100 Hz and a total Q (Qts) of 1.2. Its efficiency-bandwidth product (EBP) of 355 points toward a ported alignment. See the sealed vs ported guide for how to choose.

Recommended partners

modeled estimate

The woofers and midranges below pair well with the Dayton Audio CF18N-4 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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