18 Sound 18NLW9400
Thiele-Small parameters
| Nominal size | 18" |
|---|---|
| Impedance | 4 Ω |
| Fs | 32 Hz |
| Qts | 0.22 |
| Qes | 0.23 |
| Qms | 6.1 |
| Vas | 278 L |
| Sd | 1225 cm² |
| Xmax | 9.5 mm |
| Re | 2.6 Ω |
| Bl | 20.5 T·m |
| Mms | 185 g |
| Pe | 1200 W |
| Sensitivity | 98 dB |
Alignment hint
| EBP | 139 · ported |
|---|---|
| Sealed Vb (Qtc ≈ 0.71) | ≈ 29.8 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 |
|---|---|---|---|---|---|---|---|---|
| 18 Sound 18NLW9000 | 32 = | 0.21 -0.01 | 247 -31 | 14 +4.5 | 97 -1 | close | + | |
| 18 Sound 18NLW9400 | 33 +1 | 0.26 +0.04 | 268 -10 | 9.5 = | 98 = | close | 8 Ω vs 4 Ω: amp load changes | + |
| Precision Devices PD1850 | 30 -2 | 0.21 -0.01 | 249 -29 | 16 +6.5 | 98 = | close | 8 Ω vs 4 Ω: amp load changes · 800 W vs 1200 W: lower power handling | + |
| Radian 2218Neo | 30 -2 | 0.23 +0.01 | 312 +34 | 9 -0.5 | 99 +1 | close | 8 Ω vs 4 Ω: amp load changes · 800 W vs 1200 W: lower power handling · Xmax 9 mm < 9.5 mm: lower excursion-limited SPL | + |
| RCF LF18N451 | 31 -1 | 0.24 +0.02 | 245 -33 | 9 -0.5 | 97.5 -0.5 | close | 8 Ω vs 4 Ω: amp load changes · Xmax 9 mm < 9.5 mm: lower excursion-limited SPL | + |
| RCF LF18N401 | 32 = | 0.26 +0.04 | 257 -21 | 9 -0.5 | 98 = | close | 8 Ω vs 4 Ω: amp load changes · Xmax 9 mm < 9.5 mm: lower excursion-limited SPL | + |
| RCF LF 18N451 | 31 -1 | 0.24 +0.02 | 245 -33 | 8.8 -0.7 | 98.7 +0.7 | close | 8 Ω vs 4 Ω: amp load changes · Xmax 8.8 mm < 9.5 mm: lower excursion-limited SPL | + |
| PD PD 185C003 | 33 +1 | 0.224 = | 224 -54 | 8.8 -0.7 | 99.1 +1.1 | close | 8 Ω vs 4 Ω: amp load changes · Xmax 8.8 mm < 9.5 mm: lower excursion-limited SPL | + |
| Precision Devices PD 185C003 | 33 +1 | 0.224 = | 224 -54 | 8.8 -0.7 | 99.1 +1.1 | close | 8 Ω vs 4 Ω: amp load changes · Xmax 8.8 mm < 9.5 mm: lower excursion-limited SPL | + |
| Oberton 18NSW700 | 30.48 -1.52 | 0.243 +0.02 | 309.02 +31.02 | 14 +4.5 | 97.5 -0.5 | close | 8 Ω vs 4 Ω: amp load changes · 700 W vs 1200 W: lower power handling | + |
Compare the closest 3 against the 18NLW9400 →
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.