P.Audio BM-18LF
Thiele-Small parameters
| Nominal size | 18" |
|---|---|
| Impedance | 8 Ω |
| Fs | 39.8 Hz |
| Qts | 0.432 |
| Qes | 0.45 |
| Qms | 11.09 |
| Vas | 169.9 L |
| Sd | 1164 cm² |
| Xmax | 5.8 mm |
| Re | 5.1 Ω |
| Bl | 22.5 T·m |
| Mms | 178.8 g |
| Pe | 500 W |
| Sensitivity | 97.7 dB |
Alignment hint
| EBP | 88 · flexible |
|---|---|
| Sealed Vb (Qtc ≈ 0.71) | ≈ 101.2 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 18P1000Nd | 40 +0.2 | 0.412 -0.02 | 178 +8.1 | 7.6 +1.8 | 98.2 +0.5 | close | + | |
| DAS Audio 18SX | 39.2 -0.6 | 0.443 +0.01 | 171.9 +2 | 8 +2.2 | 96.4 -1.3 | close | + | |
| Beyma 18P100FE | 40 +0.2 | 0.39 -0.04 | 163.2 -6.7 | 7.1 +1.3 | 98.1 +0.4 | close | + | |
| Elder Audio 18LB100-8A | 40 +0.2 | 0.425 -0.01 | 208 +38.1 | 6.4 +0.6 | 98.3 +0.6 | close | + | |
| Selenium 18SW2P | 36 -3.8 | 0.419 -0.01 | 179 +9.1 | 6.5 +0.7 | 96.4 -1.3 | close | + | |
| LaVoce SAF184.02 | 38 -1.8 | 0.422 -0.01 | 150 -19.9 | 8.1 +2.3 | 96.9 -0.8 | close | + | |
| the box Speaker 18-500/8-A | 40.1 +0.3 | 0.425 -0.01 | 208.3 +38.4 | 5.4 -0.4 | 98.4 +0.7 | close | Xmax 5.4 mm < 5.8 mm: lower excursion-limited SPL | + |
| Sica 18 PF 4 | 38 -1.8 | 0.43 = | 147.3 -22.6 | 8 +2.2 | 96.3 -1.4 | close | + | |
| Faital PRO 18FH1042 | 38 -1.8 | 0.413 -0.02 | 150 -19.9 | 5.6 -0.2 | 96.4 -1.3 | close | Xmax 5.6 mm < 5.8 mm: lower excursion-limited SPL | + |
| Faital PRO 18HP1042 | 38 -1.8 | 0.41 -0.02 | 191.9 +22 | 9 +3.2 | 98 +0.3 | close | + |
Compare the closest 3 against the BM-18LF →
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.