Eminence KAPPA 12 A
Thiele-Small parameters
| Nominal size | 12" |
|---|---|
| Impedance | 8 Ω |
| Fs | 45 Hz |
| Qts | 0.27 |
| Qes | 0.28 |
| Qms | 7.76 |
| Vas | 112.1 L |
| Sd | 519.5 cm² |
| Xmax | 3.2 mm |
| Re | 5.41 Ω |
| Bl | 15.2 T·m |
| Mms | 42.2 g |
| Pe | 450 W |
| Sensitivity | 99.3 dB |
Alignment hint
| EBP | 161 · ported |
|---|---|
| Sealed Vb (Qtc ≈ 0.71) | ≈ 19.1 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 |
|---|---|---|---|---|---|---|---|---|
| Eminence KAPPA-12A | 45 = | 0.27 = | 112.1 = | 3.2 = | 99.3 = | close | + | |
| Eminence KAPPA 12 | 45 = | 0.27 = | 112.1 = | 3.2 = | 99.3 = | close | + | |
| Eighteen Sound 12ND520 | 50 +5 | 0.27 = | 111 -1.1 | 4 +0.8 | 98.7 -0.6 | close | 300 W vs 450 W: lower power handling | + |
| 18 Sound 12NDA520 | 50 +5 | 0.27 = | 111 -1.1 | 4 +0.8 | 100.5 +1.2 | close | 300 W vs 450 W: lower power handling | + |
| PHL Audio 4550 | 45 = | 0.289 +0.02 | 106 -6.1 | 4 +0.8 | 98.3 -1 | close | 250 W vs 450 W: lower power handling | + |
| PHL Audio 4500 | 42 -3 | 0.274 = | 108 -4.1 | 5.7 +2.5 | 99 -0.3 | close | 300 W vs 450 W: lower power handling | + |
| Beyma SM112 | 45 = | 0.262 -0.01 | 101 -11.1 | 4.8 +1.6 | 98.3 -1 | close | 250 W vs 450 W: lower power handling | + |
| Beyma 12CXA400Nd | 45 = | 0.268 = | 102.2 -9.9 | 6 +2.8 | 98 -1.3 | close | + | |
| SB Audience 12MW300 | 43 -2 | 0.264 -0.01 | 104 -8.1 | 5.6 +2.4 | 98.7 -0.6 | close | 300 W vs 450 W: lower power handling | + |
| Eminence KL3012CX-8 | 42 -3 | 0.299 +0.03 | 111.5 -0.6 | 3.7 +0.5 | 97.7 -1.6 | close | + |
Compare the closest 3 against the KAPPA 12 A →
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.