Dayton Audio MB620-8
midwoofer · EBP 151 → suits a ported box · nominal (full) — Dayton Audio datasheet (https://www.daytonaudio.com/images/resources/295-635--dayton-audio-mb620-8-spec-sheet.pdf)
Thiele/Small parameters
| Fs (resonance) | 104 Hz |
| Qts | 0.59 |
| Qes / Qms | 0.69 / 4.29 |
| Vas | 6.8 L |
| Re / nominal Z | 5.47 Ω / 8 Ω |
| Xmax | 2.0 mm |
| Sensitivity | 92.3 dB (1 W/1 m, calc); 94 dB (2.83 V/1 m, mfr) |
| Power handling | 200 W |
Published (nominal) values, params full — verify by measurement (DATS/REW) before building.
Datasheet (PDF) ↗ — manufacturer-hosted
Recommended enclosures
| Sealed (Qtc 0.707) — Vb | 15.5 L |
| Sealed — Fc / F3 | 124.6 / 124.6 Hz |
| Ported (suggested) — Vb | 23.7 L |
| Ported — Fb / F3 | 70.5 / 61.1 Hz |
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About this driver
The Dayton Audio MB620-8 is a 6.5″ midwoofer with a free-air resonance of 104 Hz and a total Q (Qts) of 0.59. Its efficiency-bandwidth product (EBP) of 151 points toward a ported alignment. In a 15.5 L sealed box it reaches an F3 of 124.6 Hz (Qtc 0.707); a suggested 23.7 L box tuned to 70.5 Hz extends to about 61.1 Hz. See the sealed vs ported guide for how to choose.
Recommended partners
modeled estimateThe tweeters below pair well with the Dayton Audio MB620-8 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 T29CF002Good match· 87/100
Suggested crossover 1.27 kHz (4th-order, Linkwitz-Riley)
Build this pair → - Seas T35C002Good match· 87/100
Suggested crossover 1.27 kHz (4th-order, Linkwitz-Riley)
Build this pair → - SB Acoustics SB29SDNC-C000-4Good match· 87/100
Suggested crossover 1.27 kHz (4th-order, Linkwitz-Riley)
Build this pair → - Wavecor TW030WA05Good match· 86/100
Suggested crossover 1.27 kHz (4th-order, Linkwitz-Riley)
Build this pair → - SB Acoustics SATORI TW29TXNWG-4Good match· 86/100
Suggested crossover 1.27 kHz (4th-order, Linkwitz-Riley)
Build this pair → - SB Acoustics SATORI TW29DNGood match· 86/100
Suggested crossover 1.27 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.