Altec ER-12L
Thiele-Small parameters
| Nominal size | 12" |
|---|---|
| Impedance | 8 Ω |
| Fs | 55 Hz |
| Qts | 0.236 |
| Qes | 0.25 |
| Qms | 4.37 |
| Vas | 82.1 L |
| Sd | 501.2 cm² |
| Xmax | 3.3 mm |
| Re | 5.2 Ω |
| Bl | 16.1 T·m |
| Mms | 35.9 g |
| Pe | 200 W |
| Sensitivity | 101.2 dB |
Alignment hint
| EBP | 220 · ported |
|---|---|
| Sealed Vb (Qtc ≈ 0.71) | ≈ 10.3 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 |
|---|---|---|---|---|---|---|---|---|
| Electro-Voice EVM-12L | 55 = | 0.232 = | 82.9 +0.8 | 3.3 = | 101.4 +0.2 | close | + | |
| Electro-Voice DL12X | 56 +1 | 0.233 = | 77 -5.1 | 4.1 +0.8 | 100.7 -0.5 | close | + | |
| Oberton 12L300 | 53.8 -1.2 | 0.254 +0.02 | 79.63 -2.47 | 3.25 -0.05 | 100.5 -0.7 | close | Xmax 3.25 mm < 3.3 mm: lower excursion-limited SPL | + |
| Electro-Voice EVM-DL12X | 56 +1 | 0.24 = | 77.3 -4.8 | 4.1 +0.8 | 99.2 -2 | close | 150 W vs 200 W: lower power handling | + |
| JBL M121-8 | 60 +5 | 0.235 = | 70.8 -11.3 | 3.6 +0.3 | 101.7 +0.5 | close | + | |
| 18 Sound 12ND610 | 50 -5 | 0.21 -0.03 | 85 +2.9 | 3.5 +0.2 | 101 -0.2 | close | 16 Ω vs 8 Ω: amp load changes | + |
| RCF MB 12N301 | 54 -1 | 0.24 = | 71 -11.1 | 4.9 +1.6 | 99.7 -1.5 | close | + | |
| B&C 12 HPL 76 | 49 -6 | 0.236 = | 91 +8.9 | 4 +0.7 | 99.6 -1.6 | close | + | |
| B&C 12 PLB 76 | 50 -5 | 0.229 -0.01 | 75 -7.1 | 4.4 +1.1 | 99.7 -1.5 | close | + | |
| P.Audio C12-300MB | 50 -5 | 0.256 +0.02 | 79.4 -2.7 | 3.5 +0.2 | 99.3 -1.9 | close | + |
Compare the closest 3 against the ER-12L →
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.