Eminence ALPHA-6A
midwoofer · EBP 172 → suits a ported box · nominal (full) — Eminence datasheet (https://cdn.shopify.com/s/files/1/0270/8665/1462/files/Alpha_6A.pdf)
Thiele/Small parameters
| Fs (resonance) | 103 Hz |
| Qts | 0.54 |
| Qes / Qms | 0.6 / 5.68 |
| Vas | 5.7 L |
| Re / nominal Z | 7.2 Ω / 8 Ω |
| Xmax | 3.5 mm |
| Sensitivity | 92.0 dB (1 W/1 m, calc); 93.6 dB (2.83 V/1 m, mfr) |
| Power handling | 100 W |
Published (nominal) values, params full — verify by measurement (DATS/REW) before building.
Datasheet (PDF) ↗ — manufacturer-hosted
Recommended enclosures
| Sealed (Qtc 0.707) — Vb | 7.9 L |
| Sealed — Fc / F3 | 134.9 / 134.9 Hz |
| Ported (suggested) — Vb | 14.8 L |
| Ported — Fb / F3 | 76.4 / 67.1 Hz |
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About this driver
The Eminence ALPHA-6A is a 6.5″ midwoofer with a free-air resonance of 103 Hz and a total Q (Qts) of 0.54. Its efficiency-bandwidth product (EBP) of 172 points toward a ported alignment. In a 7.9 L sealed box it reaches an F3 of 134.9 Hz (Qtc 0.707); a suggested 14.8 L box tuned to 76.4 Hz extends to about 67.1 Hz. See the sealed vs ported guide for how to choose.
Recommended partners
modeled estimateThe tweeters below pair well with the Eminence ALPHA-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 T29CF002Good match· 88/100
Suggested crossover 1.30 kHz (4th-order, Linkwitz-Riley)
Build this pair → - Wavecor TW030WA05Good match· 88/100
Suggested crossover 1.30 kHz (4th-order, Linkwitz-Riley)
Build this pair → - Seas T35C002Good match· 87/100
Suggested crossover 1.30 kHz (4th-order, Linkwitz-Riley)
Build this pair → - SB Acoustics SB29SDNC-C000-4Good match· 87/100
Suggested crossover 1.30 kHz (4th-order, Linkwitz-Riley)
Build this pair → - SB Acoustics SATORI TW29TXNWG-4Good match· 87/100
Suggested crossover 1.30 kHz (4th-order, Linkwitz-Riley)
Build this pair → - Seas M64F001Good match· 87/100
Suggested crossover 1.30 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.