Eminence ALPHA-6CBMRA
midrange · EBP 234 → suits a ported box · nominal (full) — Eminence datasheet (https://cdn.shopify.com/s/files/1/0270/8665/1462/files/Alpha_6CBMRA.pdf)
Thiele/Small parameters
| Fs (resonance) | 407 Hz |
| Qts | 1.35 |
| Qes / Qms | 1.74 / 6.04 |
| Vas | 0.6 L |
| Re / nominal Z | 5.26 Ω / 8 Ω |
| Xmax | 1.5 mm |
| Sensitivity | 95.2 dB (1 W/1 m, calc); 97.8 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
This is a midrange; Thiele/Small box parameters are not used for enclosure design.
Affiliate disclosure: some links are affiliate links and we may earn a commission on qualifying purchases at no extra cost to you. Prices are estimates at the time of writing; verify on the retailer's site.
About this driver
The Eminence ALPHA-6CBMRA is a 6.5″ midrange with a free-air resonance of 407 Hz and a total Q (Qts) of 1.35. Its efficiency-bandwidth product (EBP) of 234 points toward a ported alignment. See the sealed vs ported guide for how to choose.
Recommended partners
modeled estimateThe tweeters below pair well with the Eminence ALPHA-6CBMRA 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.
- Eminence ALPHA-4-4Good match· 84/100
Suggested crossover 1.30 kHz (4th-order, Linkwitz-Riley)
Build this pair → - Eminence ALPHA-4-8Good match· 84/100
Suggested crossover 1.30 kHz (4th-order, Linkwitz-Riley)
Build this pair → - Peerless by Tymphany XT25TG30-04Good match· 84/100
Suggested crossover 1.30 kHz (4th-order, Linkwitz-Riley)
Build this pair → - Visaton BG13P-8Good match· 84/100
Suggested crossover 1.30 kHz (4th-order, Linkwitz-Riley)
Build this pair → - Visaton DSM50FFL-8Good match· 84/100
Suggested crossover 1.30 kHz (4th-order, Linkwitz-Riley)
Build this pair → - Visaton FR10HM-8Good match· 84/100
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.