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MCM Electronics 55-2973

12" · 8 Ω · 120 W · 94.5 dB · datasheet ↗

Thiele-Small parameters

Nominal size12"
Impedance8 Ω
Fs42 Hz
Qts0.481
Qes0.565
Qms3.24
Vas122.6 L
Sd517 cm²
Xmax5 mm
Re7.2 Ω
Bl12.1 T·m
Mms43.9 g
Pe120 W
Sensitivity94.5 dB

Alignment hint

EBP74 · 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

DriverFs (Hz)QtsVas (L)Xmax (mm)Sens (dB)FitNotesCompare
MCM Electronics 55-323342 =0.459 -0.02122.6 =4.9 -0.198 +3.5close4 Ω vs 8 Ω: amp load changes · Xmax 4.9 mm < 5 mm: lower excursion-limited SPL+
MCM Electronics 55-321238.5 -3.50.477 =122.6 =4.7 -0.396.6 +2.1close4 Ω vs 8 Ω: amp load changes · Xmax 4.7 mm < 5 mm: lower excursion-limited SPL+
Visaton BZ300 4 Ohms36 -60.483 =129 +6.45 =95.7 +1.2close4 Ω vs 8 Ω: amp load changes+
Monacor SP-305I40 -20.48 =118 -4.64 -193.6 -0.9closeXmax 4 mm < 5 mm: lower excursion-limited SPL+
Conrad PA 1242.9 +0.90.462 -0.02129.2 +6.64 -195.2 +0.7closeXmax 4 mm < 5 mm: lower excursion-limited SPL+
Eminence LTD-12MK237.9 -4.10.485 =123.2 +0.65.6 +0.698 +3.5close4 Ω vs 8 Ω: amp load changes+
Audax LFP50140 -20.521 +0.04138 +15.44.5 -0.594.6 +0.1closeXmax 4.5 mm < 5 mm: lower excursion-limited SPL+
Audax PR30ST10040 -20.521 +0.04138 +15.44.5 -0.594.6 +0.1closeXmax 4.5 mm < 5 mm: lower excursion-limited SPL+
Siare 31TE vp 241.3 -0.70.506 +0.0399.9 -22.74.7 -0.395.6 +1.1closeXmax 4.7 mm < 5 mm: lower excursion-limited SPL+
Conrad CPA12-100FR41.7 -0.30.436 -0.04109.5 -13.14 -194.5 =closeXmax 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.