Beyma 18G550 v2018
Thiele-Small parameters
| Nominal size | 18" |
|---|---|
| Impedance | 8 Ω |
| Fs | 33 Hz |
| Qts | 0.396 |
| Qes | 0.42 |
| Qms | 7 |
| Vas | 290 L |
| Sd | 1320 cm² |
| Xmax | 9 mm |
| Re | 5.6 Ω |
| Bl | 23.3 T·m |
| Mms | 195.9 g |
| Pe | 900 W |
| Sensitivity | 97.5 dB |
Alignment hint
| EBP | 79 · flexible |
|---|---|
| Sealed Vb (Qtc ≈ 0.71) | ≈ 132.5 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 |
|---|---|---|---|---|---|---|---|---|
| Beyma 18G550/S-8 | 33 = | 0.396 = | 290 = | 9.3 +0.3 | 97.5 = | close | + | |
| Dayton Audio APOLLO 18F | 32 -1 | 0.401 +0.01 | 287.7 -2.3 | 10.6 +1.6 | 96.4 -1.1 | close | + | |
| Beyma 18LEX1000/Nd | 34 +1 | 0.391 -0.01 | 260 -30 | 9.4 +0.4 | 97.8 +0.3 | close | + | |
| Beyma 18LEX1200FE | 32 -1 | 0.378 -0.02 | 277 -13 | 11 +2 | 97.4 -0.1 | close | + | |
| SB Audience ROSSO-18SW650 | 31 -2 | 0.418 +0.02 | 304.3 +14.3 | 9 = | 97.2 -0.3 | close | 650 W vs 900 W: lower power handling | + |
| Beyma 18LEX1000Nd | 34 +1 | 0.39 -0.01 | 260 -30 | 11 +2 | 98 +0.5 | close | + | |
| Beyma 18G550 (prodance) | 29.5 -3.5 | 0.382 -0.01 | 291 +1 | 9 = | 96.7 -0.8 | close | + | |
| Beyma 18LEX1000Fe | 34 +1 | 0.38 -0.02 | 250 -40 | 11 +2 | 98 +0.5 | close | + | |
| PHL Audio 7081 | 34 +1 | 0.409 +0.01 | 267.6 -22.4 | 7.5 -1.5 | 97.3 -0.2 | close | Xmax 7.5 mm < 9 mm: lower excursion-limited SPL | + |
| Faital PRO 18HP1010 | 35 +2 | 0.4 = | 240.1 -49.9 | 9.75 +0.75 | 98 +0.5 | close | + |
Compare the closest 3 against the 18G550 v2018 →
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.