Beyma SM118
Thiele-Small parameters
| Nominal size | 18" |
|---|---|
| Impedance | 8 Ω |
| Fs | 30 Hz |
| Qts | 0.421 |
| Qes | 0.44 |
| Qms | 9.98 |
| Vas | 430 L |
| Sd | 1146 cm² |
| Xmax | 5.5 mm |
| Re | 6.4 Ω |
| Bl | 18.2 T·m |
| Mms | 120.5 g |
| Pe | 400 W |
| Sensitivity | 97.2 dB |
Alignment hint
| EBP | 68 · flexible |
|---|---|
| Sealed Vb (Qtc ≈ 0.71) | ≈ 236.1 L |
EBP 50-100: works in either a sealed or ported 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 |
|---|---|---|---|---|---|---|---|---|
| Fane 18-500 TLHP | 29 -1 | 0.403 -0.02 | 521 +91 | 6.3 +0.8 | 98.2 +1 | close | + | |
| McCauley 6152-8 | 30 = | 0.434 +0.01 | 354 -76 | 12 +6.5 | 97.1 -0.1 | close | + | |
| Dibeisi PS1805-8 | 27.1 -2.9 | 0.4 -0.02 | 473.8 +43.8 | 7 +1.5 | 96.1 -1.1 | close | 250 W vs 400 W: lower power handling | + |
| Eminence KAPPA 18 A | 28 -2 | 0.408 -0.01 | 475.5 +45.5 | 4.8 -0.7 | 95.9 -1.3 | close | Xmax 4.8 mm < 5.5 mm: lower excursion-limited SPL | + |
| SB Audience BIANCO-18SW450 v2020 | 27 -3 | 0.375 -0.05 | 423 -7 | 9 +3.5 | 97.2 = | close | + | |
| Peerless FSL-1830R09-04 | 27.8 -2.2 | 0.427 +0.01 | 356 -74 | 8.5 +3 | 97.8 +0.6 | close | 4 Ω vs 8 Ω: amp load changes | + |
| McCauley 6260-8 | 28 -2 | 0.379 -0.04 | 391 -39 | 8 +2.5 | 96.7 -0.5 | close | + | |
| Beyma 18G40 | 31 +1 | 0.407 -0.01 | 323 -107 | 7 +1.5 | 96.9 -0.3 | close | + | |
| Beyma 18LX60 (prodance) | 31.3 +1.3 | 0.472 +0.05 | 385.3 -44.7 | 9 +3.5 | 96.8 -0.4 | close | + | |
| Beyma 18LX60 vp1 | 31.3 +1.3 | 0.472 +0.05 | 385 -45 | 9 +3.5 | 96.8 -0.4 | close | + |
Compare the closest 3 against the SM118 →
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.