Monacor BLACKBASS-12 4 Ohms

12" · 4 Ω · 300 W · 90.1 dB

Thiele-Small parameters

Nominal size	12"
Impedance	4 Ω
Fs	29 Hz
Qts	0.482
Qes	0.51
Qms	8.8
Vas	61 L
Sd	490 cm²
Xmax	7.5 mm
Re	3.6 Ω
Bl	14.6 T·m
Mms	166.2 g
Pe	300 W
Sensitivity	90.1 dB

Alignment hint

EBP	57 · flexible
Sealed Vb (Qtc ≈ 0.71)	≈ 52.9 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
Wavecor SW312WA03	28 -1	0.479 =	61 =	7.3 -0.2	90.2 +0.1	close	Xmax 7.3 mm < 7.5 mm: lower excursion-limited SPL	+
Monacor BLACKBASS-12 8 Ohms	29 =	0.482 =	61 =	7.5 =	87.1 -3	close	8 Ω vs 4 Ω: amp load changes	+
JBL GTO 1214	28 -1	0.469 -0.01	58.2 -2.8	7.3 -0.2	89.4 -0.7	close	Xmax 7.3 mm < 7.5 mm: lower excursion-limited SPL	+
Infinity 120.3SE	28.4 -0.6	0.475 -0.01	55.6 -5.4	6.8 -0.7	89.5 -0.6	close	Xmax 6.8 mm < 7.5 mm: lower excursion-limited SPL	+
Wavecor SW310WA02	27.5 -1.5	0.52 +0.04	64.5 +3.5	7.4 -0.1	89.9 -0.2	close	Xmax 7.4 mm < 7.5 mm: lower excursion-limited SPL	+
Dayton Audio TS320D-4 TITANIC MK 4	28.3 -0.7	0.453 -0.03	64.1 +3.1	9.8 +2.3	90.7 +0.6	close		+
Focal P30F	28 -1	0.467 -0.01	70 +9	9.1 +1.6	90.1 =	close		+
Powerbass L-124D 12	29 =	0.489 +0.01	59 -2	9 +1.5	93.2 +3.1	close	2 Ω vs 4 Ω: amp load changes	+
Focal P30	31.3 +2.3	0.508 +0.03	63.9 +2.9	7.4 -0.1	91 +0.9	close	Xmax 7.4 mm < 7.5 mm: lower excursion-limited SPL	+
JL Audio 13TW5V2-2	27.6 -1.4	0.526 +0.04	60.3 -0.7	9 +1.5	89.2 -0.9	close		+

Compare the closest 3 against the BLACKBASS-12 4 Ohms →

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.