18 Sound 18iD
Thiele-Small parameters
| Nominal size | 18" |
|---|---|
| Impedance | 2 Ω |
| Fs | 40 Hz |
| Qts | 0.26 |
| Qes | 0.27 |
| Qms | 5.5 |
| Vas | 67 L |
| Sd | 1225 cm² |
| Xmax | 15.5 mm |
| Re | 1.5 Ω |
| Bl | 24 T·m |
| Mms | 420 g |
| Pe | 1800 W |
| Sensitivity | 95 dB |
Alignment hint
| EBP | 148 · ported |
|---|---|
| Sealed Vb (Qtc ≈ 0.71) | ≈ 10.5 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 18NLW9601 | 38 -2 | 0.28 +0.02 | 111 +44 | 14 -1.5 | 96 +1 | usable | 4 Ω vs 2 Ω: amp load changes · Xmax 14 mm < 15.5 mm: lower excursion-limited SPL | + |
| 18 Sound 18NLW9601 | 39 -1 | 0.28 +0.02 | 120 +53 | 14 -1.5 | 96 +1 | usable | 8 Ω vs 2 Ω: amp load changes · Xmax 14 mm < 15.5 mm: lower excursion-limited SPL | + |
| 18 Sound 18NLW9601C | 38 -2 | 0.34 +0.08 | 99 +32 | 14 -1.5 | 95 = | usable | 8 Ω vs 2 Ω: amp load changes · Xmax 14 mm < 15.5 mm: lower excursion-limited SPL | + |
| 18 Sound 18NTLS5000 | 37 -3 | 0.33 +0.07 | 75 +8 | 17.75 +2.25 | 89 -6 | usable | 4 Ω vs 2 Ω: amp load changes | + |
| 18 Sound 18NLW4500 | 37 -3 | 0.31 +0.05 | 127 +60 | 14.75 -0.75 | 96.5 +1.5 | usable | 4 Ω vs 2 Ω: amp load changes · Xmax 14.75 mm < 15.5 mm: lower excursion-limited SPL | + |
| B&C 18RS115 | 33 -7 | 0.22 -0.04 | 125 +58 | 23.5 +8 | 97.4 +2.4 | usable | 8 Ω vs 2 Ω: amp load changes | + |
| B&C 18SW115 | 34 -6 | 0.3 +0.04 | 149.1 +82.1 | 14 -1.5 | 96 +1 | usable | 4 Ω vs 2 Ω: amp load changes · Xmax 14 mm < 15.5 mm: lower excursion-limited SPL | + |
| PD PD 185NR1 | 34 -6 | 0.277 +0.02 | 102 +35 | 6.3 -9.2 | 95.1 +0.1 | risky | 8 Ω vs 2 Ω: amp load changes · 1400 W vs 1800 W: lower power handling · Xmax 6.3 mm < 15.5 mm: lower excursion-limited SPL | + |
| Precision Devices PD 185NR1 | 34 -6 | 0.277 +0.02 | 102 +35 | 6.3 -9.2 | 95.1 +0.1 | risky | 8 Ω vs 2 Ω: amp load changes · 1400 W vs 1800 W: lower power handling · Xmax 6.3 mm < 15.5 mm: lower excursion-limited SPL | + |
| B&C 18DS100 | 34 -6 | 0.29 +0.03 | 155 +88 | 14.5 -1 | 97.5 +2.5 | risky | 8 Ω vs 2 Ω: amp load changes · Xmax 14.5 mm < 15.5 mm: lower excursion-limited SPL | + |
Compare the closest 3 against the 18iD →
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.