Beyma 18G40
Thiele-Small parameters
| Nominal size | 18" |
|---|---|
| Impedance | 8 Ω |
| Fs | 31 Hz |
| Qts | 0.407 |
| Qes | 0.42 |
| Qms | 12.7 |
| Vas | 323 L |
| Sd | 1300 cm² |
| Xmax | 7 mm |
| Re | 5.9 Ω |
| Bl | 23 T·m |
| Mms | 193.3 g |
| Pe | 700 W |
| Sensitivity | 96.9 dB |
Alignment hint
| EBP | 74 · flexible |
|---|---|
| Sealed Vb (Qtc ≈ 0.71) | ≈ 160 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 |
|---|---|---|---|---|---|---|---|---|
| SB Audience ROSSO-18SW650 | 31 = | 0.418 +0.01 | 304.3 -18.7 | 9 +2 | 97.2 +0.3 | close | + | |
| Sica 18 F 3 CP | 31.6 +0.6 | 0.44 +0.03 | 321 -2 | 6.5 -0.5 | 96.9 = | close | 500 W vs 700 W: lower power handling · Xmax 6.5 mm < 7 mm: lower excursion-limited SPL | + |
| Dayton Audio APOLLO 18F | 32 +1 | 0.401 -0.01 | 287.7 -35.3 | 10.6 +3.6 | 96.4 -0.5 | close | + | |
| Beyma 18G550 v2018 | 33 +2 | 0.396 -0.01 | 290 -33 | 9 +2 | 97.5 +0.6 | close | + | |
| Beyma 18G550/S-8 | 33 +2 | 0.396 -0.01 | 290 -33 | 9.3 +2.3 | 97.5 +0.6 | close | + | |
| Beyma 18G550 (prodance) | 29.5 -1.5 | 0.382 -0.02 | 291 -32 | 9 +2 | 96.7 -0.2 | close | + | |
| McCauley 6152-8 | 30 -1 | 0.434 +0.03 | 354 +31 | 12 +5 | 97.1 +0.2 | close | + | |
| PHL Audio 7081 | 34 +3 | 0.409 = | 267.6 -55.4 | 7.5 +0.5 | 97.3 +0.4 | close | + | |
| JBL 2241H | 35 +4 | 0.4 -0.01 | 310 -13 | 7.6 +0.6 | 98.9 +2 | close | + | |
| Eminence KILOMAX PRO 18 A v2016 | 32 +1 | 0.467 +0.06 | 331.5 +8.5 | 10 +3 | 97.4 +0.5 | close | + |
Compare the closest 3 against the 18G40 →
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.