MCM Electronics 55-2973
Thiele-Small parameters
| Nominal size | 12" |
|---|---|
| Impedance | 8 Ω |
| Fs | 42 Hz |
| Qts | 0.481 |
| Qes | 0.565 |
| Qms | 3.24 |
| Vas | 122.6 L |
| Sd | 517 cm² |
| Xmax | 5 mm |
| Re | 7.2 Ω |
| Bl | 12.1 T·m |
| Mms | 43.9 g |
| Pe | 120 W |
| Sensitivity | 94.5 dB |
Alignment hint
| EBP | 74 · flexible |
|---|---|
| Sealed Vb (Qtc ≈ 0.71) | ≈ 105.6 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 |
|---|---|---|---|---|---|---|---|---|
| MCM Electronics 55-3233 | 42 = | 0.459 -0.02 | 122.6 = | 4.9 -0.1 | 98 +3.5 | close | 4 Ω vs 8 Ω: amp load changes · Xmax 4.9 mm < 5 mm: lower excursion-limited SPL | + |
| MCM Electronics 55-3212 | 38.5 -3.5 | 0.477 = | 122.6 = | 4.7 -0.3 | 96.6 +2.1 | close | 4 Ω vs 8 Ω: amp load changes · Xmax 4.7 mm < 5 mm: lower excursion-limited SPL | + |
| Visaton BZ300 4 Ohms | 36 -6 | 0.483 = | 129 +6.4 | 5 = | 95.7 +1.2 | close | 4 Ω vs 8 Ω: amp load changes | + |
| Monacor SP-305I | 40 -2 | 0.48 = | 118 -4.6 | 4 -1 | 93.6 -0.9 | close | Xmax 4 mm < 5 mm: lower excursion-limited SPL | + |
| Conrad PA 12 | 42.9 +0.9 | 0.462 -0.02 | 129.2 +6.6 | 4 -1 | 95.2 +0.7 | close | Xmax 4 mm < 5 mm: lower excursion-limited SPL | + |
| Eminence LTD-12MK2 | 37.9 -4.1 | 0.485 = | 123.2 +0.6 | 5.6 +0.6 | 98 +3.5 | close | 4 Ω vs 8 Ω: amp load changes | + |
| Audax LFP501 | 40 -2 | 0.521 +0.04 | 138 +15.4 | 4.5 -0.5 | 94.6 +0.1 | close | Xmax 4.5 mm < 5 mm: lower excursion-limited SPL | + |
| Audax PR30ST100 | 40 -2 | 0.521 +0.04 | 138 +15.4 | 4.5 -0.5 | 94.6 +0.1 | close | Xmax 4.5 mm < 5 mm: lower excursion-limited SPL | + |
| Siare 31TE vp 2 | 41.3 -0.7 | 0.506 +0.03 | 99.9 -22.7 | 4.7 -0.3 | 95.6 +1.1 | close | Xmax 4.7 mm < 5 mm: lower excursion-limited SPL | + |
| Conrad CPA12-100FR | 41.7 -0.3 | 0.436 -0.04 | 109.5 -13.1 | 4 -1 | 94.5 = | close | Xmax 4 mm < 5 mm: lower excursion-limited SPL | + |
Compare the closest 3 against the 55-2973 →
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.