Fane Colossus Prime 21XS
Thiele-Small parameters
| Nominal size | 21" |
|---|---|
| Impedance | 8 Ω |
| Fs | 35 Hz |
| Qts | 0.339 |
| Qes | 0.354 |
| Qms | 7.88 |
| Vas | 266 L |
| Sd | 1520 cm² |
| Xmax | 14 mm |
| Re | 5.1 Ω |
| Bl | 31.3 T·m |
| Mms | 304 g |
| Pe | 1500 W |
| Sensitivity | 97.5 dB |
Alignment hint
| EBP | 99 · flexible |
|---|---|
| Sealed Vb (Qtc ≈ 0.71) | ≈ 79.4 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 |
|---|---|---|---|---|---|---|---|---|
| B&C 21SW115 | 33 -2 | 0.36 +0.02 | 278 +12 | 14 = | 97 -0.5 | close | 4 Ω vs 8 Ω: amp load changes | + |
| Fane Colossus Prime 21NDXL | 33 -2 | 0.36 +0.02 | 241 -25 | 14 = | 98 +0.5 | close | + | |
| 18 Sound 21NLW9001 | 31 -4 | 0.34 = | 272 +6 | 14 = | 95 -2.5 | close | 4 Ω vs 8 Ω: amp load changes | + |
| 18 Sound 21NTLW5000 | 31 -4 | 0.36 +0.02 | 270 +4 | 17.5 +3.5 | 97 -0.5 | close | + | |
| 18 Sound 21NLW9001 | 32 -3 | 0.31 -0.03 | 244 -22 | 14 = | 98 +0.5 | close | + | |
| RCF LF21N551 | 35 = | 0.33 -0.01 | 200 -66 | 15 +1 | 97 -0.5 | close | + | |
| Lavoce SAN215.30 | 35 = | 0.33 -0.01 | 200 -66 | 14.9 +0.9 | 95.7 -1.8 | close | + | |
| 18 Sound 21NTLW5000 | 30 -5 | 0.32 -0.02 | 300 +34 | 17.5 +3.5 | 97 -0.5 | close | 4 Ω vs 8 Ω: amp load changes | + |
| 18 Sound 21NLW5300 | 31 -4 | 0.32 -0.02 | 325 +59 | 15.3 +1.3 | 98.5 +1 | close | + | |
| 18 Sound 21NLW4100 | 34 -1 | 0.4 +0.06 | 219 -47 | 15.2 +1.2 | 97 -0.5 | usable | 4 Ω vs 8 Ω: amp load changes | + |
Compare the closest 3 against the Colossus Prime 21XS →
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.