Monacor SONIC 12 vp

12" · 8 Ω · 350 W · 88.1 dB

Thiele-Small parameters

Nominal size	12"
Impedance	8 Ω
Fs	27 Hz
Qts	0.469
Qes	0.49
Qms	11.2
Vas	51 L
Sd	511 cm²
Xmax	6.3 mm
Re	4 Ω
Bl	18.6 T·m
Mms	249.4 g
Pe	350 W
Sensitivity	88.1 dB

Alignment hint

EBP	55 · flexible
Sealed Vb (Qtc ≈ 0.71)	≈ 40.1 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
JBL S3-1224	29.1 +2.1	0.473 =	52.6 +1.6	6 -0.3	88.4 +0.3	close	Xmax 6 mm < 6.3 mm: lower excursion-limited SPL	+
Infinity KAPPA 120.9W	27.2 +0.2	0.43 -0.04	54.4 +3.4	6.7 +0.4	87.9 -0.2	close		+
JBL STADIUM 1224	29.7 +2.7	0.473 =	52.6 +1.6	6 -0.3	88.7 +0.6	close	Xmax 6 mm < 6.3 mm: lower excursion-limited SPL	+
Infinity 120.3SE	28.4 +1.4	0.475 +0.01	55.6 +4.6	6.8 +0.5	89.5 +1.4	close	4 Ω vs 8 Ω: amp load changes	+
Rockford Fosgate T0D212	25.3 -1.7	0.473 =	55 +4	10.5 +4.2	88 -0.1	close	4 Ω vs 8 Ω: amp load changes	+
JBL GTO 1214	28 +1	0.469 =	58.2 +7.2	7.3 +1	89.4 +1.3	close	4 Ω vs 8 Ω: amp load changes	+
Fountek FW323 - 4 Ohms	30 +3	0.452 -0.02	51.4 +0.4	6.6 +0.3	89.7 +1.6	close	4 Ω vs 8 Ω: amp load changes	+
Alpine SWR-12D2 vp	27 =	0.441 -0.03	46 -5	10 +3.7	87.8 -0.3	close		+
Focal E30KX	29 +2	0.454 -0.01	50 -1	10.7 +4.4	86.9 -1.2	close		+
Focal SUB30KXE	29 +2	0.454 -0.01	50 -1	10.8 +4.5	86.9 -1.2	close		+

Compare the closest 3 against the SONIC 12 vp →

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.