Audio Nirvana CLASSIC 15 FERRITE
Thiele-Small parameters
| Nominal size | 15" |
|---|---|
| Impedance | 8 Ω |
| Fs | 24.7 Hz |
| Qts | 0.271 |
| Qes | 0.29 |
| Qms | 4.14 |
| Vas | 551.3 L |
| Sd | 851 cm² |
| Xmax | 1.1 mm |
| Re | 6.8 Ω |
| Bl | 16.7 T·m |
| Mms | 76.5 g |
| Pe | 80 W |
| Sensitivity | 97.3 dB |
Alignment hint
| EBP | 85 · flexible |
|---|---|
| Sealed Vb (Qtc ≈ 0.71) | ≈ 94.9 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 |
|---|---|---|---|---|---|---|---|---|
| Altec 421-8H-II vp2 | 25.6 +0.9 | 0.28 +0.01 | 501.7 -49.6 | 1.3 +0.2 | 98.2 +0.9 | close | + | |
| Altec 421-8H-II vp1 | 26.9 +2.2 | 0.272 = | 479.3 -72 | 1.3 +0.2 | 98.6 +1.3 | close | + | |
| Fluxmag 1504 | 25.5 +0.8 | 0.26 -0.01 | 530 -21.3 | 4 +2.9 | 97 -0.3 | close | + | |
| Altec 421-16LF | 27 +2.3 | 0.246 -0.03 | 600.3 +49 | 1.3 +0.2 | 96.8 -0.5 | close | 16 Ω vs 8 Ω: amp load changes | + |
| Altec 619-8A | 24.6 -0.1 | 0.241 -0.03 | 621.3 +70 | 1.3 +0.2 | 98.6 +1.3 | close | + | |
| Audio Dynamique AD380PM100 | 25.5 +0.8 | 0.26 -0.01 | 530 -21.3 | 5 +3.9 | 97 -0.3 | close | + | |
| Altec 421-8LF | 27.5 +2.8 | 0.254 -0.02 | 576 +24.7 | 1.3 +0.2 | 99.9 +2.6 | close | + | |
| Supravox 400-2000 Argent vp | 24.3 -0.4 | 0.268 = | 605.5 +54.2 | 5 +3.9 | 98.3 +1 | close | + | |
| Monacor SP-380P | 23 -1.7 | 0.27 = | 505 -46.3 | 4 +2.9 | 96.4 -0.9 | close | + | |
| Supravox 400 EXC Ag 13V | 25.3 +0.6 | 0.253 -0.02 | 555.6 +4.3 | 5 +3.9 | 98.7 +1.4 | close | + |
Compare the closest 3 against the CLASSIC 15 FERRITE →
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.