Beyma 18GT400
Thiele-Small parameters
| Nominal size | 18" |
|---|---|
| Impedance | 8 Ω |
| Fs | 40 Hz |
| Qts | 0.383 |
| Qes | 0.4 |
| Qms | 8.77 |
| Vas | 185 L |
| Sd | 1100 cm² |
| Xmax | 5.3 mm |
| Re | 5.5 Ω |
| Bl | 22.4 T·m |
| Mms | 145.2 g |
| Pe | 400 W |
| Sensitivity | 98.3 dB |
Alignment hint
| EBP | 100 · flexible |
|---|---|
| Sealed Vb (Qtc ≈ 0.71) | ≈ 76.8 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 18P100FE | 40 = | 0.39 +0.01 | 163.2 -21.8 | 7.1 +1.8 | 98.1 -0.2 | close | + | |
| Beyma 18P1000Nd | 40 = | 0.412 +0.03 | 178 -7 | 7.6 +2.3 | 98.2 -0.1 | close | + | |
| RCF LF 18P400 | 39.5 -0.5 | 0.391 +0.01 | 201 +16 | 8 +2.7 | 99 +0.7 | close | + | |
| Beyma 18G50 vp | 39 -1 | 0.365 -0.02 | 204.9 +19.9 | 6.4 +1.1 | 98.1 -0.2 | close | + | |
| RCF L 18/851KN | 39 -1 | 0.357 -0.03 | 200 +15 | 5 -0.3 | 98.4 +0.1 | close | Xmax 5 mm < 5.3 mm: lower excursion-limited SPL | + |
| the box Speaker 18-500/8-A | 40.1 +0.1 | 0.425 +0.04 | 208.3 +23.3 | 5.4 +0.1 | 98.4 +0.1 | close | + | |
| Sica 18 S 4 PL | 36.2 -3.8 | 0.39 +0.01 | 189 +4 | 8 +2.7 | 97.3 -1 | close | + | |
| Elder Audio 18LB100-8A | 40 = | 0.425 +0.04 | 208 +23 | 6.4 +1.1 | 98.3 = | close | + | |
| B&C 18PZW100 | 37 -3 | 0.36 -0.02 | 186 +1 | 8 +2.7 | 97.6 -0.7 | close | + | |
| Faital PRO 18HP1042 | 38 -2 | 0.41 +0.03 | 191.9 +6.9 | 9 +3.7 | 98 -0.3 | close | + |
Compare the closest 3 against the 18GT400 →
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.