Ciare CH321

12" · 4 Ω · 150 W · 103 dB · datasheet ↗

Thiele-Small parameters

Nominal size	12"
Impedance	4 Ω
Fs	64 Hz
Qts	0.309
Qes	0.34
Qms	3.36
Vas	62 L
Sd	528 cm²
Xmax	1.3 mm
Re	3 Ω
Bl	11.8 T·m
Mms	39 g
Pe	150 W
Sensitivity	103 dB

Alignment hint

EBP	188 · ported
Sealed Vb (Qtc ≈ 0.71)	≈ 14.6 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
JBL G125-8	65 +1	0.32 +0.01	70.8 +8.8	2.5 +1.2	101.4 -1.6	close	8 Ω vs 4 Ω: amp load changes	+
Fertin Acoustics B34D77	66.6 +2.6	0.324 +0.02	52.5 -9.5	2.5 +1.2	102 -1	close		+
RCF MB 12G300	61 -3	0.301 -0.01	57 -5	4.3 +3	100.1 -2.9	usable	8 Ω vs 4 Ω: amp load changes	+
Electro-Voice DL12BFH	60 -4	0.307 =	55 -7	4 +2.7	100.3 -2.7	usable	8 Ω vs 4 Ω: amp load changes	+
ATC PA50-314 8 BASS	69 +5	0.309 =	47 -15	1.2 -0.1	99.9 -3.1	usable	8 Ω vs 4 Ω: amp load changes · 50 W vs 150 W: lower power handling · Xmax 1.2 mm < 1.3 mm: lower excursion-limited SPL	+
18 Sound 12NCX750	58 -6	0.296 -0.01	63 +1	4.6 +3.3	99.7 -3.3	usable	8 Ω vs 4 Ω: amp load changes	+
Fane F90	70 +6	0.382 +0.07	61 -1	1.5 +0.2	100.2 -2.8	usable	8 Ω vs 4 Ω: amp load changes · 90 W vs 150 W: lower power handling	+
RCF 12 CX251	60 -4	0.266 -0.04	62 =	3.7 +2.4	100.6 -2.4	usable	8 Ω vs 4 Ω: amp load changes	+
RCF CX 12N251	60 -4	0.266 -0.04	62 =	3.7 +2.4	100.6 -2.4	usable	8 Ω vs 4 Ω: amp load changes	+
ATC PA50-314 8 BASS R	54 -10	0.32 +0.01	67 +5	1.6 +0.3	98.2 -4.8	usable	8 Ω vs 4 Ω: amp load changes · 50 W vs 150 W: lower power handling	+

Compare the closest 3 against the CH321 →

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.