Eminence BETA-6A
midwoofer · EBP 186 → suits a ported box · nominal (full) — Eminence datasheet (https://cdn.shopify.com/s/files/1/0270/8665/1462/files/Beta_6A.pdf)
Thiele/Small parameters
| Fs (resonance) | 123 Hz |
| Qts | 0.56 |
| Qes / Qms | 0.66 / 3.46 |
| Vas | 3.4 L |
| Re / nominal Z | 5.18 Ω / 8 Ω |
| Xmax | 4.5 mm |
| Sensitivity | 91.6 dB (1 W/1 m, calc); 94 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) — Vb | 5.7 L |
| Sealed — Fc / F3 | 155.3 / 155.3 Hz |
| Ported (suggested) — Vb | 10.0 L |
| Ported — Fb / F3 | 87.9 / 76.8 Hz |
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About this driver
The Eminence BETA-6A is a 6.5″ midwoofer with a free-air resonance of 123 Hz and a total Q (Qts) of 0.56. Its efficiency-bandwidth product (EBP) of 186 points toward a ported alignment. In a 5.7 L sealed box it reaches an F3 of 155.3 Hz (Qtc 0.707); a suggested 10.0 L box tuned to 87.9 Hz extends to about 76.8 Hz. See the sealed vs ported guide for how to choose.
Recommended partners
modeled estimateThe tweeters below pair well with the Eminence BETA-6A 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 T35C002Good match· 87/100
Suggested crossover 1.28 kHz (4th-order, Linkwitz-Riley)
Build this pair → - Seas T29CF002Good match· 87/100
Suggested crossover 1.28 kHz (4th-order, Linkwitz-Riley)
Build this pair → - SB Acoustics SB29SDNC-C000-4Good match· 87/100
Suggested crossover 1.28 kHz (4th-order, Linkwitz-Riley)
Build this pair → - SB Acoustics SATORI TW29TXNWG-4Good match· 87/100
Suggested crossover 1.28 kHz (4th-order, Linkwitz-Riley)
Build this pair → - Wavecor TW030WA05Good match· 86/100
Suggested crossover 1.28 kHz (4th-order, Linkwitz-Riley)
Build this pair → - SB Acoustics SATORI TW29DNGood match· 86/100
Suggested crossover 1.28 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.