Dayton Audio PC105-4
fullrange · EBP 121 → suits a ported box · nominal (full) — Dayton Audio datasheet (https://www.daytonaudio.com/images/resources/295-158-dayton-audio-pc105-4-specifications.pdf)
Thiele/Small parameters
| Fs (resonance) | 81.4 Hz |
| Qts | 0.51 |
| Qes / Qms | 0.67 / 2.17 |
| Vas | 0.1 L |
| Re / nominal Z | 3.3 Ω / 4 Ω |
| Xmax | 2.0 mm |
| Sensitivity | 72.0 dB (1 W/1 m, calc); 90.3 dB (2.83 V/1 m, mfr) |
| Power handling | 40 W |
Published (nominal) values, params full — verify by measurement (DATS/REW) before building.
Datasheet (PDF) ↗ — manufacturer-hosted
Recommended enclosures
| Sealed (Qtc 0.707) — Vb | 0.1 L |
| Sealed — Fc / F3 | 112.8 / 112.9 Hz |
| Ported (suggested) — Vb | 0.3 L |
| Ported — Fb / F3 | 64.0 / 57.1 Hz |
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About this driver
The Dayton Audio PC105-4 is a 4″ fullrange with a free-air resonance of 81.4 Hz and a total Q (Qts) of 0.51. Its efficiency-bandwidth product (EBP) of 121 points toward a ported alignment. In a 0.1 L sealed box it reaches an F3 of 112.9 Hz (Qtc 0.707); a suggested 0.3 L box tuned to 64.0 Hz extends to about 57.1 Hz. See the sealed vs ported guide for how to choose.
Recommended partners
modeled estimateThe tweeters below pair well with the Dayton Audio PC105-4 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.
- Seas 27TBFC/G H1212-06Good match· 92/100
Suggested crossover 2.01 kHz (4th-order, Linkwitz-Riley)
Build this pair → - SB Acoustics SB29RDC-C000-4Good match· 92/100
Suggested crossover 2.01 kHz (4th-order, Linkwitz-Riley)
Build this pair → - Dayton Audio EC30-4Good match· 92/100
Suggested crossover 2.01 kHz (4th-order, Linkwitz-Riley)
Build this pair → - SB Acoustics SATORI TW29BGood match· 92/100
Suggested crossover 2.01 kHz (4th-order, Linkwitz-Riley)
Build this pair → - SB Acoustics SATORI TW29B-BGood match· 92/100
Suggested crossover 2.01 kHz (4th-order, Linkwitz-Riley)
Build this pair → - SB Acoustics SATORI TW29BNGood match· 92/100
Suggested crossover 2.01 kHz (4th-order, Linkwitz-Riley)
Build this pair →
Modeled estimate from T/S + geometry — no measurements. The verdict is robust; it improves with measured FRD/ZMA data.