Altec 920-8A
Thiele-Small parameters
| Nominal size | 12" |
|---|---|
| Impedance | 8 Ω |
| Fs | 48 Hz |
| Qts | 0.501 |
| Qes | 0.58 |
| Qms | 3.7 |
| Vas | 141.6 L |
| Sd | 503.2 cm² |
| Xmax | 1.3 mm |
| Re | 7 Ω |
| Bl | 10 T·m |
| Mms | 27.6 g |
| Pe | 125 W |
| Sensitivity | 96.9 dB |
Alignment hint
| EBP | 83 · flexible |
|---|---|
| Sealed Vb (Qtc ≈ 0.71) | ≈ 142.7 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 |
|---|---|---|---|---|---|---|---|---|
| Eminence BETA 12LT | 45 -3 | 0.507 +0.01 | 136.3 -5.3 | 3.2 +1.9 | 95.9 -1 | close | + | |
| Eminence BETA-12LTA | 45 -3 | 0.51 +0.01 | 136.3 -5.3 | 3.2 +1.9 | 95.4 -1.5 | close | + | |
| JBL 2125 | 45 -3 | 0.45 -0.05 | 135.9 -5.7 | 2.5 +1.2 | 97.2 +0.3 | close | 50 W vs 125 W: lower power handling | + |
| JBL D123 | 45 -3 | 0.45 -0.05 | 135.9 -5.7 | 2.5 +1.2 | 97.2 +0.3 | close | 50 W vs 125 W: lower power handling | + |
| Isophon 37/10 vp | 47.1 -0.9 | 0.542 +0.04 | 142.5 +0.9 | 1.8 +0.5 | 101.1 +4.2 | close | 4 Ω vs 8 Ω: amp load changes · 17 W vs 125 W: lower power handling | + |
| Eminence BETA 12CX | 47 -1 | 0.48 -0.02 | 120.94 -20.66 | 3.5 +2.2 | 97.3 +0.4 | close | + | |
| Eminence BETA 12CX v2019 | 47 -1 | 0.476 -0.03 | 120.9 -20.7 | 3.5 +2.2 | 97.5 +0.6 | close | + | |
| Eminence BETA 12 | 50 +2 | 0.519 +0.02 | 114.7 -26.9 | 4.4 +3.1 | 96.5 -0.4 | usable | + | |
| Eminence BETA 12CX | 43 -5 | 0.474 -0.03 | 161 +19.4 | 3.5 +2.2 | 97.5 +0.6 | usable | + | |
| Philips AD12202/M8 | 45.6 -2.4 | 0.419 -0.08 | 138 -3.6 | 4 +2.7 | 96.8 -0.1 | usable | + |
Compare the closest 3 against the 920-8A →
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.