Monacor SP-302C

12" · 4 Ω · 150 W · 94.3 dB

Thiele-Small parameters

Nominal size	12"
Impedance	4 Ω
Fs	33 Hz
Qts	0.607
Qes	0.71
Qms	4.19
Vas	155 L
Sd	531 cm²
Xmax	5 mm
Re	3.7 Ω
Bl	8 T·m
Mms	59.3 g
Pe	150 W
Sensitivity	94.3 dB

Alignment hint

EBP	46 · sealed
Sealed Vb (Qtc ≈ 0.71)	≈ 434.1 L

EBP < 50: favours a sealed (closed) 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 LEGEND BP122 8 Ohms	35 +2	0.537 -0.07	157.4 +2.4	6.2 +1.2	94.2 -0.1	close	8 Ω vs 4 Ω: amp load changes	+
STX W.30.200.8.MC	31 -2	0.622 +0.02	148 -7	6.2 +1.2	91.3 -3	close	8 Ω vs 4 Ω: amp load changes · 100 W vs 150 W: lower power handling	+
Sphynx SP-W310PP	33 =	0.618 +0.01	182.8 +27.8	5 =	91 -3.3	close	16 Ω vs 4 Ω: amp load changes · 100 W vs 150 W: lower power handling	+
Pioneer TS-W302F	33.4 +0.4	0.6 -0.01	105.6 -49.4	6 +1	94.3 =	close		+
Davis 31TCA12 vp rc1 d	35 +2	0.53 -0.08	169.8 +14.8	6 +1	93.2 -1.1	close	8 Ω vs 4 Ω: amp load changes	+
Celestion PULSE XL 12.20	35.1 +2.1	0.503 -0.1	153.3 -1.7	8.3 +3.3	94.2 -0.1	close	8 Ω vs 4 Ω: amp load changes	+
Focal 33H	29.4 -3.6	0.618 +0.01	124.4 -30.6	7.5 +2.5	92.5 -1.8	usable		+
Infinity 120W.IB	32 -1	0.527 -0.08	127 -28	8.1 +3.1	94.9 +0.6	usable		+
Visaton W300	32 -1	0.549 -0.06	190 +35	7 +2	92.2 -2.1	usable	8 Ω vs 4 Ω: amp load changes	+
Infinity KAPPA CS 120 LB	29 -4	0.485 -0.12	161.4 +6.4	6.7 +1.7	94.3 =	usable		+

Compare the closest 3 against the SP-302C →

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.