Altec 421-16LF
Thiele-Small parameters
| Nominal size | 15" |
|---|---|
| Impedance | 16 Ω |
| Fs | 27 Hz |
| Qts | 0.246 |
| Qes | 0.27 |
| Qms | 2.79 |
| Vas | 600.3 L |
| Sd | 825.8 cm² |
| Xmax | 1.3 mm |
| Re | 11.5 Ω |
| Bl | 20 T·m |
| Mms | 55.3 g |
| Pe | 150 W |
| Sensitivity | 96.8 dB |
Alignment hint
| EBP | 100 · flexible |
|---|---|
| Sealed Vb (Qtc ≈ 0.71) | ≈ 82.7 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 619-8A | 24.6 -2.4 | 0.241 -0.01 | 621.3 +21 | 1.3 = | 98.6 +1.8 | close | 8 Ω vs 16 Ω: amp load changes · 75 W vs 150 W: lower power handling | + |
| Altec 421-8LF | 27.5 +0.5 | 0.254 +0.01 | 576 -24.3 | 1.3 = | 99.9 +3.1 | close | 8 Ω vs 16 Ω: amp load changes | + |
| Altec 604-8G | 25.8 -1.2 | 0.252 +0.01 | 624.4 +24.1 | 3.8 +2.5 | 98.7 +1.9 | close | 8 Ω vs 16 Ω: amp load changes · 100 W vs 150 W: lower power handling | + |
| Altec 421-8H-II vp1 | 26.9 -0.1 | 0.272 +0.03 | 479.3 -121 | 1.3 = | 98.6 +1.8 | close | 8 Ω vs 16 Ω: amp load changes | + |
| Audio Nirvana CLASSIC 15 FERRITE | 24.7 -2.3 | 0.271 +0.03 | 551.3 -49 | 1.1 -0.2 | 97.3 +0.5 | close | 8 Ω vs 16 Ω: amp load changes · 80 W vs 150 W: lower power handling · Xmax 1.1 mm < 1.3 mm: lower excursion-limited SPL | + |
| Fluxmag 1504 | 25.5 -1.5 | 0.26 +0.01 | 530 -70.3 | 4 +2.7 | 97 +0.2 | close | 8 Ω vs 16 Ω: amp load changes | + |
| Altec 421-8H-II vp2 | 25.6 -1.4 | 0.28 +0.03 | 501.7 -98.6 | 1.3 = | 98.2 +1.4 | usable | 8 Ω vs 16 Ω: amp load changes | + |
| Altec 416-8C | 23.9 -3.1 | 0.249 = | 643.9 +43.6 | 3.8 +2.5 | 98.2 +1.4 | usable | 8 Ω vs 16 Ω: amp load changes | + |
| Audio Dynamique AD380PM100 | 25.5 -1.5 | 0.26 +0.01 | 530 -70.3 | 5 +3.7 | 97 +0.2 | usable | 8 Ω vs 16 Ω: amp load changes | + |
| Supravox 400 EXC Ag 13V | 25.3 -1.7 | 0.253 +0.01 | 555.6 -44.7 | 5 +3.7 | 98.7 +1.9 | usable | 8 Ω vs 16 Ω: amp load changes | + |
Compare the closest 3 against the 421-16LF →
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.