Altec 920-8B
Thiele-Small parameters
| Nominal size | 12" |
|---|---|
| Impedance | 8 Ω |
| Fs | 48 Hz |
| Qts | 0.362 |
| Qes | 0.42 |
| Qms | 2.6 |
| Vas | 85 L |
| Sd | 503.2 cm² |
| Xmax | 1.3 mm |
| Re | 5.1 Ω |
| Bl | 13 T·m |
| Mms | 45.9 g |
| Pe | 125 W |
| Sensitivity | 97.4 dB |
Alignment hint
| EBP | 114 · ported |
|---|---|
| Sealed Vb (Qtc ≈ 0.71) | ≈ 30.2 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 |
|---|---|---|---|---|---|---|---|---|
| Jensen J12/200-8 | 50 +2 | 0.368 +0.01 | 89 +4 | 2 +0.7 | 97.5 +0.1 | close | + | |
| Sica 12 L1 2.5 SL | 47.5 -0.5 | 0.36 = | 81.8 -3.2 | 3.7 +2.4 | 97.3 -0.1 | close | + | |
| Ciare PW320ND | 49 +1 | 0.345 -0.02 | 87 +2 | 3 +1.7 | 97.8 +0.4 | close | + | |
| Eminence DELTA 12 A | 51 +3 | 0.353 -0.01 | 81.7 -3.3 | 2.4 +1.1 | 98.1 +0.7 | close | + | |
| Eminence DELTA PRO 12 | 51 +3 | 0.353 -0.01 | 81.7 -3.3 | 3.2 +1.9 | 98.1 +0.7 | close | + | |
| SICA 12E2CS | 47.5 -0.5 | 0.36 = | 76.9 -8.1 | 2 +0.7 | 94.6 -2.8 | close | + | |
| SICA 12 E 2 CS | 48 = | 0.364 = | 76.9 -8.1 | 4 +2.7 | 95.9 -1.5 | close | + | |
| Audax PR330T2 4 Ohms | 46.8 -1.2 | 0.354 -0.01 | 80.1 -4.9 | 3.4 +2.1 | 99.3 +1.9 | close | 4 Ω vs 8 Ω: amp load changes | + |
| SICA PL 12 B 3 S | 46.7 -1.3 | 0.356 -0.01 | 79.3 -5.7 | 5.5 +4.2 | 97.1 -0.3 | close | + | |
| SICA 12 E 2 CS Z007660 | 47.5 -0.5 | 0.364 = | 76.9 -8.1 | 4 +2.7 | 95.8 -1.6 | close | + |
Compare the closest 3 against the 920-8B →
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.