Celestion NTR21-5010JD
Thiele-Small parameters
| Nominal size | 21" |
|---|---|
| Impedance | 8 Ω |
| Fs | 30.2 Hz |
| Qts | 0.291 |
| Qes | 0.308 |
| Qms | 5.231 |
| Vas | 341.215 L |
| Sd | 1663 cm² |
| Xmax | 9 mm |
| Re | 5.36 Ω |
| Bl | 32.39 T·m |
| Mms | 319.232 g |
| Pe | 1600 W |
| Sensitivity | 96.7 dB |
Alignment hint
| EBP | 98 · flexible |
|---|---|
| Sealed Vb (Qtc ≈ 0.71) | ≈ 69.6 L |
EBP 50-100: works in either a sealed or ported 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 |
|---|---|---|---|---|---|---|---|---|
| Beyma 21"LEX1600/Nd | 30 -0.2 | 0.29 = | 305 -36.21 | 14 +5 | 98 +1.3 | close | + | |
| Beyma 21QLEX1600Fe | 30 -0.2 | 0.28 -0.01 | 309 -32.21 | 13 +4 | 98 +1.3 | close | + | |
| 18 Sound 21NTLW5000 | 30 -0.2 | 0.32 +0.03 | 300 -41.21 | 17.5 +8.5 | 97 +0.3 | close | 4 Ω vs 8 Ω: amp load changes | + |
| 18 Sound 21NLW5300 | 31 +0.8 | 0.32 +0.03 | 325 -16.21 | 15.3 +6.3 | 98.5 +1.8 | close | + | |
| RCF LF21N451 | 30 -0.2 | 0.26 -0.03 | 375 +33.79 | 13 +4 | 98.5 +1.8 | close | + | |
| 18 Sound 21LW2600 | 27 -3.2 | 0.33 +0.04 | 333 -8.21 | 14.6 +5.6 | 97 +0.3 | close | + | |
| B&C 21SW115 | 30 -0.2 | 0.37 +0.08 | 318 -23.21 | 14 +5 | 97 +0.3 | usable | + | |
| RCF LF21N401 | 30 -0.2 | 0.37 +0.08 | 374 +32.79 | 11 +2 | 98 +1.3 | usable | + | |
| Faital PRO 21XL3000 | 30 -0.2 | 0.25 -0.04 | 284.6 -56.61 | 17.67 +8.67 | 98 +1.3 | usable | + | |
| 18 Sound 21LW1400 | 28 -2.2 | 0.24 -0.05 | 385 +43.79 | 9.5 +0.5 | 99 +2.3 | usable | 1000 W vs 1600 W: lower power handling | + |
Compare the closest 3 against the NTR21-5010JD →
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.