Eminence COMMONWEALTH 12

12" · 8 Ω · 225 W · 98.1 dB · datasheet ↗

Thiele-Small parameters

Nominal size	12"
Impedance	8 Ω
Fs	50 Hz
Qts	0.332
Qes	0.35
Qms	6.61
Vas	90 L
Sd	519.5 cm²
Xmax	0.7 mm
Re	6.34 Ω
Bl	15.6 T·m
Mms	42.6 g
Pe	225 W
Sensitivity	98.1 dB

Alignment hint

EBP	143 · ported
Sealed Vb (Qtc ≈ 0.71)	≈ 25.5 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
B&C 12 CXT	49 -1	0.321 -0.01	91 +1	3 +2.3	98.6 +0.5	close		+
Altec 920-8B	48 -2	0.362 +0.03	85 -5	1.3 +0.6	97.4 -0.7	close	125 W vs 225 W: lower power handling	+
Jensen J12/200-8	50 =	0.368 +0.04	89 -1	2 +1.3	97.5 -0.6	close		+
Ciare PW320ND	49 -1	0.345 +0.01	87 -3	3 +2.3	97.8 -0.3	close	150 W vs 225 W: lower power handling	+
PD P12/150	51 +1	0.318 -0.01	80 -10	2.3 +1.6	98.2 +0.1	close	150 W vs 225 W: lower power handling	+
Precision Devices P12/150	51 +1	0.318 -0.01	80 -10	2.3 +1.6	98.2 +0.1	close	150 W vs 225 W: lower power handling	+
Eminence DELTA 12 A	51 +1	0.353 +0.02	81.7 -8.3	2.4 +1.7	98.1 =	close		+
Benett 12.180 X/N	49 -1	0.325 -0.01	100.9 +10.9	3 +2.3	98.5 +0.4	close	100 W vs 225 W: lower power handling	+
Audax PR33ST150	46 -4	0.327 -0.01	90 =	3.5 +2.8	97.2 -0.9	close	150 W vs 225 W: lower power handling	+
Altec 917-8A	45.3 -4.7	0.298 -0.03	95.1 +5.1	1.3 +0.6	97.5 -0.6	close	60 W vs 225 W: lower power handling	+

Compare the closest 3 against the COMMONWEALTH 12 →

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.