Beyma 21L50
Thiele-Small parameters
| Nominal size | 21.5" |
|---|---|
| Impedance | 8 Ω |
| Fs | 33 Hz |
| Qts | 0.434 |
| Qes | 0.45 |
| Qms | 12.03 |
| Vas | 300 L |
| Sd | 1764 cm² |
| Xmax | 7.9 mm |
| Re | 6 Ω |
| Bl | 30.6 T·m |
| Mms | 338.2 g |
| Pe | 1000 W |
| Sensitivity | 97 dB |
Alignment hint
| EBP | 73 · flexible |
|---|---|
| Sealed Vb (Qtc ≈ 0.71) | ≈ 181.3 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 21SW1600ND | 33 = | 0.382 -0.05 | 268 -32 | 8.9 +1 | 97.6 +0.6 | close | + | |
| LaVoce SAF214.50 vp | 30 -3 | 0.401 -0.03 | 311 +11 | 11.6 +3.7 | 96.4 -0.6 | close | + | |
| LaVoce SAF214.50 | 30 -3 | 0.435 = | 267 -33 | 11.6 +3.7 | 95.6 -1.4 | close | + | |
| B&C 21 SW 115 | 32.5 -0.5 | 0.404 -0.03 | 268.7 -31.3 | 9.9 +2 | 99.2 +2.2 | close | 4 Ω vs 8 Ω: amp load changes | + |
| Ciare NDC 21-5 | 32.2 -0.8 | 0.344 -0.09 | 270.8 -29.2 | 8.8 +0.9 | 97.2 +0.2 | close | + | |
| SB Audience NERO-21SW1100D | 32 -1 | 0.339 -0.09 | 312.6 +12.6 | 8.1 +0.2 | 98.6 +1.6 | usable | + | |
| 18 Sound 21NLW9000 | 29 -4 | 0.347 -0.09 | 304 +4 | 10.7 +2.8 | 96.4 -0.6 | usable | + | |
| RCF 21LNW9000 | 29 -4 | 0.347 -0.09 | 304 +4 | 10.7 +2.8 | 96.4 -0.6 | usable | + | |
| B&C 21 SW 115 v2015 | 33 = | 0.353 -0.08 | 278 -22 | 9.3 +1.4 | 100.6 +3.6 | usable | 4 Ω vs 8 Ω: amp load changes | + |
| MC Kenzie FRL-21/1200-LF | 30 -3 | 0.378 -0.06 | 374 +74 | 9.5 +1.6 | 98 +1 | usable | + |
Compare the closest 3 against the 21L50 →
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.