18 Sound 18NLW9000
Thiele-Small parameters
| Nominal size | 18" |
|---|---|
| Impedance | 4 Ω |
| Fs | 32 Hz |
| Qts | 0.21 |
| Qes | 0.22 |
| Qms | 5 |
| Vas | 247 L |
| Sd | 1222 cm² |
| Xmax | 14 mm |
| Re | 3.1 Ω |
| Bl | 25 T·m |
| Mms | 228 g |
| Pe | 1800 W |
| Sensitivity | 97 dB |
Alignment hint
| EBP | 145 · ported |
|---|---|
| Sealed Vb (Qtc ≈ 0.71) | ≈ 23.9 L |
EBP > 100: favours a ported (bass-reflex) 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 |
|---|---|---|---|---|---|---|---|---|
| Precision Devices PD1850 | 30 -2 | 0.21 = | 249 +2 | 16 +2 | 98 +1 | close | 8 Ω vs 4 Ω: amp load changes · 800 W vs 1800 W: lower power handling | + |
| Beyma 18QLEX1600Fe | 30 -2 | 0.23 +0.02 | 195 -52 | 13 -1 | 97 = | close | 8 Ω vs 4 Ω: amp load changes · Xmax 13 mm < 14 mm: lower excursion-limited SPL | + |
| Oberton 18NSW700 | 30.48 -1.52 | 0.243 +0.03 | 309.02 +62.02 | 14 = | 97.5 +0.5 | usable | 8 Ω vs 4 Ω: amp load changes · 700 W vs 1800 W: lower power handling | + |
| Precision Devices PD.185C003-8 | 33 +1 | 0.24 +0.03 | 224 -23 | 11 -3 | 97.3 +0.3 | usable | 8 Ω vs 4 Ω: amp load changes · 1000 W vs 1800 W: lower power handling · Xmax 11 mm < 14 mm: lower excursion-limited SPL | + |
| 18 Sound 18NLW9400 | 32 = | 0.22 +0.01 | 278 +31 | 9.5 -4.5 | 98 +1 | usable | 1200 W vs 1800 W: lower power handling · Xmax 9.5 mm < 14 mm: lower excursion-limited SPL | + |
| RCF LF18N451 | 31 -1 | 0.24 +0.03 | 245 -2 | 9 -5 | 97.5 +0.5 | usable | 8 Ω vs 4 Ω: amp load changes · Xmax 9 mm < 14 mm: lower excursion-limited SPL | + |
| Precision Devices PD.1850/2 | 33.1 +1.1 | 0.24 +0.03 | 203.84 -43.16 | 11.1 -2.9 | 96.7 -0.3 | usable | 8 Ω vs 4 Ω: amp load changes · 800 W vs 1800 W: lower power handling · Xmax 11.1 mm < 14 mm: lower excursion-limited SPL | + |
| B&C 18DS115 | 30 -2 | 0.2 -0.01 | 168 -79 | 16.5 +2.5 | 98 +1 | usable | 8 Ω vs 4 Ω: amp load changes | + |
| RCF LF18X451 | 30 -2 | 0.28 +0.07 | 220 -27 | 14 = | 97 = | usable | 8 Ω vs 4 Ω: amp load changes | + |
| Faital PRO 18XL2000 | 28 -4 | 0.27 +0.06 | 232.1 -14.9 | 16.32 +2.32 | 97 = | usable | 8 Ω vs 4 Ω: amp load changes | + |
Compare the closest 3 against the 18NLW9000 →
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.