Eminence BETA 8CX
Thiele-Small parameters
| Nominal size | 8" |
|---|---|
| Impedance | 8 Ω |
| Fs | 62 Hz |
| Qts | 0.29 |
| Qes | 0.31 |
| Qms | 6.57 |
| Vas | 21.43 L |
| Sd | 210 cm² |
| Xmax | 3.2 mm |
| Re | 5.37 Ω |
| Bl | 11.21 T·m |
| Mms | 19 g |
| Pe | 250 W |
| Sensitivity | 92.9 dB |
Alignment hint
| EBP | 200 · ported |
|---|---|
| Sealed Vb (Qtc ≈ 0.71) | ≈ 4.3 L |
EBP > 100: favours a ported (bass-reflex) alignment.
Rules of thumb from T/S parameters only. Verify against a real simulation before cutting wood.
Substitute candidates
| Driver | Fs (Hz) | Qts | Vas (L) | Xmax (mm) | Sens (dB) | Fit | Notes | Compare |
|---|---|---|---|---|---|---|---|---|
| B&C 8MBX51 | 60 -2 | 0.29 = | 23 +1.57 | 6 +2.8 | 96.5 +3.6 | close | + | |
| Sica 8 L 2 SL | 64 +2 | 0.32 +0.03 | 18.2 -3.23 | 3.5 +0.3 | 94.5 +1.6 | close | + | |
| B&C 8FMB51 | 67 +5 | 0.28 -0.01 | 20.7 -0.73 | 5.5 +2.3 | 96.5 +3.6 | close | + | |
| Sica 8 D 1.5 CS | 62 = | 0.3 +0.01 | 25.5 +4.07 | 2.5 -0.7 | 95.3 +2.4 | usable | 130 W vs 250 W: lower power handling · Xmax 2.5 mm < 3.2 mm: lower excursion-limited SPL | + |
| 18 Sound 8NW650 | 62 = | 0.25 -0.04 | 18.99 -2.44 | 5.5 +2.3 | 95 +2.1 | usable | 16 Ω vs 8 Ω: amp load changes | + |
| Faital PRO 8RS250 | 56 -6 | 0.32 +0.03 | 18.3 -3.13 | 6.92 +3.72 | 93 +0.1 | usable | + | |
| Sica 8 S 2.5 CP | 54 -8 | 0.33 +0.04 | 18.6 -2.83 | 5 +1.8 | 93 +0.1 | usable | + | |
| Beyma 8"P300Fe/N | 53 -9 | 0.31 +0.02 | 24.8 +3.37 | 6 +2.8 | 94 +1.1 | usable | + | |
| Sica 8 Fe 2 CP | 67 +5 | 0.32 +0.03 | 16.9 -4.53 | 4.5 +1.3 | 94.6 +1.7 | usable | + | |
| B&C 8FG51 | 49 -13 | 0.32 +0.03 | 20 -1.43 | 6.5 +3.3 | 93 +0.1 | usable | + |
Compare the closest 3 against the BETA 8CX →
Ranked on parameter similarity only (Qts, Fs, Vas, Xmax, sensitivity). Same nominal size required. A hint, not a simulation, model the swap before cutting or buying.
Used in enclosures (0)
No enclosure in the catalog uses this driver yet.