Ciare CW321

12" · 4 Ω · 150 W · 96.5 dB

Thiele-Small parameters

Nominal size	12"
Impedance	4 Ω
Fs	45 Hz
Qts	0.26
Qes	0.29
Qms	2.54
Vas	94 L
Sd	537 cm²
Xmax	1.35 mm
Re	3 Ω
Bl	12.33 T·m
Mms	50 g
Pe	150 W
Sensitivity	96.5 dB

Alignment hint

EBP	155 · ported
Sealed Vb (Qtc ≈ 0.71)	≈ 14.7 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
Altec 917-8A	45.3 +0.3	0.298 +0.04	95.1 +1.1	1.3 -0.05	97.5 +1	close	8 Ω vs 4 Ω: amp load changes · 60 W vs 150 W: lower power handling · Xmax 1.3 mm < 1.35 mm: lower excursion-limited SPL	+
Tannoy GOLD 12	49.7 +4.7	0.237 -0.02	99.7 +5.7	1.4 +0.05	96.5 =	close	16 Ω vs 4 Ω: amp load changes · 30 W vs 150 W: lower power handling	+
Fertin Acoustics 30S	42 -3	0.282 +0.02	101 +7	2 +0.65	97.2 +0.7	close	8 Ω vs 4 Ω: amp load changes · 30 W vs 150 W: lower power handling	+
Fertin Acoustics 30AP	42 -3	0.282 +0.02	101 +7	2 +0.65	97.3 +0.8	close	8 Ω vs 4 Ω: amp load changes · 30 W vs 150 W: lower power handling	+
Beyma 12K200 v2	43 -2	0.276 +0.02	96.2 +2.2	4.5 +3.15	96.6 +0.1	close	8 Ω vs 4 Ω: amp load changes	+
Beyma SM112	45 =	0.262 =	101 +7	4.8 +3.45	98.3 +1.8	close	8 Ω vs 4 Ω: amp load changes	+
P.Audio C12-300MB v2012	41 -4	0.265 +0.01	99.2 +5.2	3.5 +2.15	97.6 +1.1	close	8 Ω vs 4 Ω: amp load changes	+
Beyma 12CXA400Nd v2018	45 =	0.251 -0.01	88.5 -5.5	5.5 +4.15	97.7 +1.2	close	8 Ω vs 4 Ω: amp load changes	+
PD PD 912	41.3 -3.7	0.253 -0.01	97.9 +3.9	5 +3.65	96.7 +0.2	close	8 Ω vs 4 Ω: amp load changes	+
Precision Devices PD 912	41.3 -3.7	0.253 -0.01	97.9 +3.9	5 +3.65	96.7 +0.2	close	8 Ω vs 4 Ω: amp load changes	+

Compare the closest 3 against the CW321 →

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.