18 Sound 18ND9300
Thiele-Small parameters
| Nominal size | 18" |
|---|---|
| Impedance | 8 Ω |
| Fs | 30 Hz |
| Qts | 0.28 |
| Qes | 0.29 |
| Qms | 7.86 |
| Vas | 322 L |
| Sd | 1225 cm² |
| Xmax | 9.5 mm |
| Re | 5 Ω |
| Bl | 24.4 T·m |
| Mms | 183.9 g |
| Pe | 1000 W |
| Sensitivity | 98.8 dB |
Alignment hint
| EBP | 103 · ported |
|---|---|
| Sealed Vb (Qtc ≈ 0.71) | ≈ 59.9 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 |
|---|---|---|---|---|---|---|---|---|
| 18 Sound 18NLW9300 | 30 = | 0.28 = | 316 -6 | 8 -1.5 | 98.7 -0.1 | close | Xmax 8 mm < 9.5 mm: lower excursion-limited SPL | + |
| RCF L 18P400 | 29 -1 | 0.279 = | 340 +18 | 8.8 -0.7 | 98.5 -0.3 | close | Xmax 8.8 mm < 9.5 mm: lower excursion-limited SPL | + |
| RCF LF 18X400 v2 | 28 -2 | 0.278 = | 340 +18 | 9 -0.5 | 98 -0.8 | close | Xmax 9 mm < 9.5 mm: lower excursion-limited SPL | + |
| 18 Sound 18LW1400 | 31 +1 | 0.29 +0.01 | 297 -25 | 9 -0.5 | 98 -0.8 | close | Xmax 9 mm < 9.5 mm: lower excursion-limited SPL | + |
| PD PD 18BR40 | 30 = | 0.32 +0.04 | 309 -13 | 9.3 -0.2 | 98 -0.8 | close | 700 W vs 1000 W: lower power handling · Xmax 9.3 mm < 9.5 mm: lower excursion-limited SPL | + |
| Precision Devices PD 18BR40 | 30 = | 0.32 +0.04 | 309 -13 | 9.3 -0.2 | 98 -0.8 | close | 700 W vs 1000 W: lower power handling · Xmax 9.3 mm < 9.5 mm: lower excursion-limited SPL | + |
| RCF LF 18G400 | 28 -2 | 0.273 -0.01 | 360 +38 | 9 -0.5 | 98.3 -0.5 | close | Xmax 9 mm < 9.5 mm: lower excursion-limited SPL | + |
| B&C 18 TBX 46 | 31 +1 | 0.277 = | 270 -52 | 9 -0.5 | 98.2 -0.6 | close | Xmax 9 mm < 9.5 mm: lower excursion-limited SPL | + |
| RCF LF18X400 | 28 -2 | 0.27 -0.01 | 340 +18 | 9 -0.5 | 97.5 -1.3 | close | Xmax 9 mm < 9.5 mm: lower excursion-limited SPL | + |
| Faital PRO 18FH510 | 30 = | 0.26 -0.02 | 391.4 +69.4 | 9.45 -0.05 | 98 -0.8 | close | 4 Ω vs 8 Ω: amp load changes · 600 W vs 1000 W: lower power handling · Xmax 9.45 mm < 9.5 mm: lower excursion-limited SPL | + |
Compare the closest 3 against the 18ND9300 →
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.