18 Sound 21NLW9601
Thiele-Small parameters
| Nominal size | 21" |
|---|---|
| Impedance | 8 Ω |
| Fs | 37 Hz |
| Qts | 0.29 |
| Qes | 0.31 |
| Qms | 5.5 |
| Vas | 175 L |
| Sd | 1662 cm² |
| Xmax | 14 mm |
| Re | 5.9 Ω |
| Bl | 43 T·m |
| Mms | 408 g |
| Pe | 1800 W |
| Sensitivity | 98 dB |
Alignment hint
| EBP | 119 · ported |
|---|---|
| Sealed Vb (Qtc ≈ 0.71) | ≈ 35.4 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 |
|---|---|---|---|---|---|---|---|---|
| B&C 21DS115 | 34 -3 | 0.27 -0.02 | 204 +29 | 16.5 +2.5 | 99 +1 | close | + | |
| 18 Sound 21NLW9601C | 38 +1 | 0.29 = | 140 -35 | 14 = | 94.5 -3.5 | close | 4 Ω vs 8 Ω: amp load changes | + |
| RCF LF21N551 | 35 -2 | 0.33 +0.04 | 200 +25 | 15 +1 | 97 -1 | close | + | |
| B&C 21SW152 | 32 -5 | 0.3 +0.01 | 200 +25 | 15 +1 | 96 -2 | close | 4 Ω vs 8 Ω: amp load changes | + |
| Lavoce SAN215.30 | 35 -2 | 0.33 +0.04 | 200 +25 | 14.9 +0.9 | 95.7 -2.3 | usable | + | |
| 18 Sound 21NLW9001 | 32 -5 | 0.31 +0.02 | 244 +69 | 14 = | 98 = | usable | + | |
| 18 Sound 21NLW9601 | 41 +4 | 0.32 +0.03 | 123 -52 | 14 = | 98 = | usable | 4 Ω vs 8 Ω: amp load changes | + |
| B&C 21IPAL | 37 = | 0.21 -0.08 | 155 -20 | 22 +8 | 99 +1 | usable | 1 Ω vs 8 Ω: amp load changes | + |
| Fane Colossus Prime 21XS | 35 -2 | 0.339 +0.05 | 266 +91 | 14 = | 97.5 -0.5 | usable | + | |
| B&C 21SW152 | 32 -5 | 0.36 +0.07 | 200 +25 | 15 +1 | 96 -2 | usable | + |
Compare the closest 3 against the 21NLW9601 →
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.