Ciare M320.75 C/Fx - 04

12" · 4 Ω · 100 W · 103.1 dB · datasheet ↗

Thiele-Small parameters

Nominal size	12"
Impedance	4 Ω
Fs	40 Hz
Qts	0.121
Qes	0.13
Qms	1.7
Vas	106 L
Sd	551.6 cm²
Xmax	2 mm
Re	3.25 Ω
Bl	20 T·m
Mms	63.7 g
Pe	100 W
Sensitivity	103.1 dB

Alignment hint

EBP	308 · ported
Sealed Vb (Qtc ≈ 0.71)	≈ 3.2 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
RCF L 12P110K	44 +4	0.136 +0.02	98 -8	3 +1	101.3 -1.8	usable	8 Ω vs 4 Ω: amp load changes	+
RCF L12P110K	44 +4	0.13 +0.01	98 -8	3 +1	99.6 -3.5	usable	8 Ω vs 4 Ω: amp load changes	+
Ciare M320.75 C/Fx - 08	40 =	0.155 +0.03	106 =	2.3 +0.3	99.1 -4	usable	8 Ω vs 4 Ω: amp load changes	+
18 Sound 12ND610	46 +6	0.14 +0.02	94.4 -11.6	3.5 +1.5	102 -1.1	usable	8 Ω vs 4 Ω: amp load changes	+
Beyma 12G250/R	42 +2	0.173 +0.05	106 =	2 =	99.5 -3.6	usable	8 Ω vs 4 Ω: amp load changes	+
Beyma 12P80Nd	45 +5	0.147 +0.03	95.7 -10.3	5.5 +3.5	101.5 -1.6	usable	8 Ω vs 4 Ω: amp load changes	+
BMS 12N810	40.7 +0.7	0.16 +0.04	89.6 -16.4	2.5 +0.5	100 -3.1	usable	8 Ω vs 4 Ω: amp load changes	+
Audax PR33S100 vp2	35 -5	0.136 +0.02	136.9 +30.9	3.8 +1.8	99.6 -3.5	usable	8 Ω vs 4 Ω: amp load changes	+
Beyma 12G200	40 =	0.184 +0.06	108 +2	3 +1	98.3 -4.8	usable	8 Ω vs 4 Ω: amp load changes	+
Oberton 12NMB600	41.03 +1.03	0.134 +0.01	70.8 -35.2	5.25 +3.25	99 -4.1	usable	8 Ω vs 4 Ω: amp load changes	+

Compare the closest 3 against the M320.75 C/Fx - 04 →

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.