BMS 18N850vv2
Thiele-Small parameters
| Nominal size | 18" |
|---|---|
| Impedance | 8 Ω |
| Fs | 29.8 Hz |
| Qts | 0.33 |
| Qes | 0.35 |
| Qms | 7 |
| Vas | 243 L |
| Sd | 1213 cm² |
| Xmax | 12 mm |
| Re | 5 Ω |
| Bl | 25.4 T·m |
| Mms | 240 g |
| Pe | 1200 W |
| Sensitivity | 95 dB |
Alignment hint
| EBP | 85 · flexible |
|---|---|
| Sealed Vb (Qtc ≈ 0.71) | ≈ 67.7 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 |
|---|---|---|---|---|---|---|---|---|
| Lavoce SAF184.03 | 30 +0.2 | 0.32 -0.01 | 260 +17 | 13 +1 | 94.9 -0.1 | close | + | |
| RCF LF18N405 | 30 +0.2 | 0.32 -0.01 | 227 -16 | 14 +2 | 97 +2 | close | + | |
| BMS 18S450 | 29 -0.8 | 0.31 -0.02 | 281 +38 | 12 = | 95 = | close | + | |
| RCF LF 18N405 | 30 +0.2 | 0.324 -0.01 | 227 -16 | 10.8 -1.2 | 96.7 +1.7 | close | Xmax 10.8 mm < 12 mm: lower excursion-limited SPL | + |
| JBL 2269H | 28 -1.8 | 0.361 +0.03 | 237 -6 | 10.6 -1.4 | 95 = | close | Xmax 10.6 mm < 12 mm: lower excursion-limited SPL | + |
| Ciare NDH18_4S | 31 +1.2 | 0.319 -0.01 | 239 -4 | 9.4 -2.6 | 96.5 +1.5 | close | Xmax 9.4 mm < 12 mm: lower excursion-limited SPL | + |
| RCF LF18N408 | 30 +0.2 | 0.33 = | 193 -50 | 15 +3 | 97 +2 | close | + | |
| Faital PRO 18HW1070 | 32 +2.2 | 0.33 = | 191.5 -51.5 | 13 +1 | 96 +1 | close | 4 Ω vs 8 Ω: amp load changes | + |
| Sica 18 PFS 4 | 28.7 -1.1 | 0.37 +0.04 | 245.9 +2.9 | 9.5 -2.5 | 95.1 +0.1 | close | Xmax 9.5 mm < 12 mm: lower excursion-limited SPL | + |
| RCF LF18X401 | 30 +0.2 | 0.3 -0.03 | 274 +31 | 12 = | 97.5 +2.5 | close | + |
Compare the closest 3 against the 18N850vv2 →
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.