Altec ER-12
Thiele-Small parameters
| Nominal size | 12" |
|---|---|
| Impedance | 8 Ω |
| Fs | 47.7 Hz |
| Qts | 0.256 |
| Qes | 0.28 |
| Qms | 3 |
| Vas | 121.2 L |
| Sd | 503.2 cm² |
| Xmax | 2.5 mm |
| Re | 6.5 Ω |
| Bl | 15.1 T·m |
| Mms | 32.6 g |
| Pe | 200 W |
| Sensitivity | 99.6 dB |
Alignment hint
| EBP | 170 · ported |
|---|---|
| Sealed Vb (Qtc ≈ 0.71) | ≈ 18.3 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 |
|---|---|---|---|---|---|---|---|---|
| Monacor SP-310PA | 48 +0.3 | 0.248 -0.01 | 111 -10.2 | 2.5 = | 99.5 -0.1 | close | + | |
| Peavey 1202-4 v1993 | 47.1 -0.6 | 0.252 = | 100 -21.2 | 2.6 +0.1 | 100.5 +0.9 | close | + | |
| Eminence KAPPA-12A | 45 -2.7 | 0.27 +0.01 | 112.1 -9.1 | 3.2 +0.7 | 99.3 -0.3 | close | + | |
| Eminence KAPPA 12 | 45 -2.7 | 0.27 +0.01 | 112.1 -9.1 | 3.2 +0.7 | 99.3 -0.3 | close | + | |
| Eminence KAPPA 12 A | 45 -2.7 | 0.27 +0.01 | 112.1 -9.1 | 3.2 +0.7 | 99.3 -0.3 | close | + | |
| Fostex F 356 | 46.9 -0.8 | 0.272 +0.02 | 143 +21.8 | 2.6 +0.1 | 99.3 -0.3 | close | 60 W vs 200 W: lower power handling | + |
| Fane STUDIO 12L | 49 +1.3 | 0.241 -0.02 | 120.9 -0.3 | 4.3 +1.8 | 101.2 +1.6 | close | + | |
| Electro-Voice SP12 vp | 44 -3.7 | 0.24 -0.02 | 123.5 +2.3 | 2.2 -0.3 | 99.1 -0.5 | close | 50 W vs 200 W: lower power handling · Xmax 2.2 mm < 2.5 mm: lower excursion-limited SPL | + |
| Eighteen Sound 12ND520 | 50 +2.3 | 0.27 +0.01 | 111 -10.2 | 4 +1.5 | 98.7 -0.9 | close | + | |
| 18 Sound 12NDA520 | 50 +2.3 | 0.27 +0.01 | 111 -10.2 | 4 +1.5 | 100.5 +0.9 | close | + |
Compare the closest 3 against the ER-12 →
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.