Monacor SP-330PAX

12" · 8 Ω · 125 W · 97.4 dB

Thiele-Small parameters

Nominal size	12"
Impedance	8 Ω
Fs	33 Hz
Qts	0.238
Qes	0.25
Qms	5.09
Vas	190 L
Sd	530 cm²
Xmax	4.5 mm
Re	6.3 Ω
Bl	15.9 T·m
Mms	48.2 g
Pe	125 W
Sensitivity	97.4 dB

Alignment hint

EBP	132 · ported
Sealed Vb (Qtc ≈ 0.71)	≈ 24.3 L

EBP > 100: favours a ported (bass-reflex) 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
Fostex L 345	34 +1	0.242 =	197 +7	5.7 +1.2	97.3 -0.1	close		+
Beyma SM212	34 +1	0.258 +0.02	198 +8	8.2 +3.7	98 +0.6	close		+
Beyma 12K200 v1	35 +2	0.225 -0.01	160 -30	4.5 =	97.8 +0.4	close		+
Beyma 12XA30/ND	35 +2	0.21 -0.03	172 -18	4 -0.5	97.2 -0.2	close	Xmax 4 mm < 4.5 mm: lower excursion-limited SPL	+
Fostex L 362	35 +2	0.211 -0.03	153 -37	4.2 -0.3	97.4 =	usable	Xmax 4.2 mm < 4.5 mm: lower excursion-limited SPL	+
EMS LB12EX_12V	34 +1	0.232 -0.01	200 +10	3 -1.5	95.5 -1.9	usable	16 Ω vs 8 Ω: amp load changes · 40 W vs 125 W: lower power handling · Xmax 3 mm < 4.5 mm: lower excursion-limited SPL	+
RCF L 12P400K	34 +1	0.241 =	130 -60	6 +1.5	96.3 -1.1	usable		+
Fostex LS 362	35 +2	0.211 -0.03	152.9 -37.1	4 -0.5	97.4 =	usable	Xmax 4 mm < 4.5 mm: lower excursion-limited SPL	+
AE Speakers TD12M	38.1 +5.1	0.25 +0.01	140 -50	6 +1.5	97.3 -0.1	usable		+
SEAS 33F-WKA MINE	24.8 -8.2	0.236 =	206.1 +16.1	4.5 =	94.4 -3	usable	70 W vs 125 W: lower power handling	+

Compare the closest 3 against the SP-330PAX →

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.