MCM Electronics 55-3212

12" · 4 Ω · 100 W · 96.6 dB · datasheet ↗

Thiele-Small parameters

Nominal size	12"
Impedance	4 Ω
Fs	38.5 Hz
Qts	0.477
Qes	0.565
Qms	3.059
Vas	122.6 L
Sd	531 cm²
Xmax	4.7 mm
Re	3.4 Ω
Bl	9 T·m
Mms	55.1 g
Pe	100 W
Sensitivity	96.6 dB

Alignment hint

EBP	68 · flexible
Sealed Vb (Qtc ≈ 0.71)	≈ 102.4 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
Eminence LTD-12MK2	37.9 -0.6	0.485 +0.01	123.2 +0.6	5.6 +0.9	98 +1.4	close		+
Visaton BZ300 4 Ohms	36 -2.5	0.483 +0.01	129 +6.4	5 +0.3	95.7 -0.9	close		+
MCM Electronics 55-2973	42 +3.5	0.481 =	122.6 =	5 +0.3	94.5 -2.1	close	8 Ω vs 4 Ω: amp load changes	+
MCM Electronics 55-3233	42 +3.5	0.459 -0.02	122.6 =	4.9 +0.2	98 +1.4	close		+
LaVoce LBASS12-15	38 -0.5	0.48 =	160.93 +38.33	4.7 =	95.5 -1.1	close	8 Ω vs 4 Ω: amp load changes	+
Monacor SP-305I	40 +1.5	0.48 =	118 -4.6	4 -0.7	93.6 -3	close	8 Ω vs 4 Ω: amp load changes · Xmax 4 mm < 4.7 mm: lower excursion-limited SPL	+
Davis KIT ALBEDO	37.5 -1	0.459 -0.02	166 +43.4	5 +0.3	96.5 -0.1	close	8 Ω vs 4 Ω: amp load changes	+
Conrad PA 12	42.9 +4.4	0.462 -0.01	129.2 +6.6	4 -0.7	95.2 -1.4	close	8 Ω vs 4 Ω: amp load changes · Xmax 4 mm < 4.7 mm: lower excursion-limited SPL	+
Siare 31TE vp 2	41.3 +2.8	0.506 +0.03	99.9 -22.7	4.7 =	95.6 -1	close	8 Ω vs 4 Ω: amp load changes	+
Audax LFP501	40 +1.5	0.521 +0.04	138 +15.4	4.5 -0.2	94.6 -2	close	8 Ω vs 4 Ω: amp load changes · Xmax 4.5 mm < 4.7 mm: lower excursion-limited SPL	+

Compare the closest 3 against the 55-3212 →

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.