B&C 21IPAL
Thiele-Small parameters
| Nominal size | 21" |
|---|---|
| Impedance | 1 Ω |
| Fs | 37 Hz |
| Qts | 0.21 |
| Qes | 0.22 |
| Qms | 4.9 |
| Vas | 155 L |
| Sd | 1680 cm² |
| Xmax | 22 mm |
| Re | 0.7 Ω |
| Bl | 19.1 T·m |
| Mms | 487 g |
| Pe | 2500 W |
| Sensitivity | 99 dB |
Alignment hint
| EBP | 168 · ported |
|---|---|
| Sealed Vb (Qtc ≈ 0.71) | ≈ 15 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 |
|---|---|---|---|---|---|---|---|---|
| Faital PRO 21XL3000 | 32 -5 | 0.22 +0.01 | 223.5 +68.5 | 17.67 -4.33 | 98 -1 | usable | 4 Ω vs 1 Ω: amp load changes · Xmax 17.67 mm < 22 mm: lower excursion-limited SPL | + |
| 18 Sound 21iD | 38 +1 | 0.23 +0.02 | 143 -12 | 14 -8 | 94.2 -4.8 | usable | 2 Ω vs 1 Ω: amp load changes · 1800 W vs 2500 W: lower power handling · Xmax 14 mm < 22 mm: lower excursion-limited SPL | + |
| B&C 21DS115 | 32 -5 | 0.21 = | 219 +64 | 15 -7 | 100 +1 | usable | 4 Ω vs 1 Ω: amp load changes · 1700 W vs 2500 W: lower power handling · Xmax 15 mm < 22 mm: lower excursion-limited SPL | + |
| B&C 21DS115 | 34 -3 | 0.27 +0.06 | 204 +49 | 16.5 -5.5 | 99 = | usable | 8 Ω vs 1 Ω: amp load changes · 1700 W vs 2500 W: lower power handling · Xmax 16.5 mm < 22 mm: lower excursion-limited SPL | + |
| 18 Sound 21NLW9601 | 37 = | 0.29 +0.08 | 175 +20 | 14 -8 | 98 -1 | usable | 8 Ω vs 1 Ω: amp load changes · 1800 W vs 2500 W: lower power handling · Xmax 14 mm < 22 mm: lower excursion-limited SPL | + |
| 18 Sound 21NLW9601C | 38 +1 | 0.29 +0.08 | 140 -15 | 14 -8 | 94.5 -4.5 | usable | 4 Ω vs 1 Ω: amp load changes · 1800 W vs 2500 W: lower power handling · Xmax 14 mm < 22 mm: lower excursion-limited SPL | + |
| Faital PRO 21XL3000 | 30 -7 | 0.25 +0.04 | 284.6 +129.6 | 17.67 -4.33 | 98 -1 | usable | 8 Ω vs 1 Ω: amp load changes · Xmax 17.67 mm < 22 mm: lower excursion-limited SPL | + |
| 18 Sound 21NLW9601 | 41 +4 | 0.32 +0.11 | 123 -32 | 14 -8 | 98 -1 | risky | 4 Ω vs 1 Ω: amp load changes · 1800 W vs 2500 W: lower power handling · Xmax 14 mm < 22 mm: lower excursion-limited SPL | + |
| RCF LF21N551 | 35 -2 | 0.33 +0.12 | 200 +45 | 15 -7 | 97 -2 | risky | 8 Ω vs 1 Ω: amp load changes · Xmax 15 mm < 22 mm: lower excursion-limited SPL | + |
| Eminence NSW6021-6 | 29 -8 | 0.31 +0.1 | 224.58 +69.58 | 21 -1 | 97 -2 | risky | 6 Ω vs 1 Ω: amp load changes · Xmax 21 mm < 22 mm: lower excursion-limited SPL | + |
Compare the closest 3 against the 21IPAL →
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.