Eminence COMMONWEALTH 15

15" · 4 Ω · 225 W · 101.3 dB · datasheet ↗

Thiele-Small parameters

Nominal size	15"
Impedance	4 Ω
Fs	52 Hz
Qts	0.526
Qes	0.57
Qms	6.75
Vas	163 L
Sd	889.6 cm²
Xmax	0.7 mm
Re	3.72 Ω
Bl	11.7 T·m
Mms	63.8 g
Pe	225 W
Sensitivity	101.3 dB

Alignment hint

EBP	91 · flexible
Sealed Vb (Qtc ≈ 0.71)	≈ 201.9 L

EBP 50-100: works in either a sealed or ported 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 2155H	53 +1	0.474 -0.05	164.2 +1.2	2.5 +1.8	101.4 +0.1	close	8 Ω vs 4 Ω: amp load changes · 150 W vs 225 W: lower power handling	+
Celestion BN15-300S-4	50 -2	0.537 +0.01	138.9 -24.1	2.5 +1.8	101.4 +0.1	close		+
18 Sound 15W500	50 -2	0.52 -0.01	189 +26	4 +3.3	100.5 -0.8	usable	8 Ω vs 4 Ω: amp load changes	+
Celestion BL15-300X	48 -4	0.447 -0.08	158.8 -4.2	4.3 +3.6	101.3 =	usable		+
SICA 15 BP 2.5 CS	46.4 -5.6	0.499 -0.03	167.9 +4.9	2.5 +1.8	97.2 -4.1	usable	8 Ω vs 4 Ω: amp load changes	+
Celestion TF1525E 4 Ohms	49.8 -2.2	0.493 -0.03	128.2 -34.8	3.5 +2.8	100.7 -0.6	usable		+
Celestion 15 Professional Woofer - OEM	46.9 -5.1	0.497 -0.03	175 +12	3.5 +2.8	98.8 -2.5	usable	8 Ω vs 4 Ω: amp load changes · 150 W vs 225 W: lower power handling	+
JBL 2032H	57 +5	0.541 +0.02	133.1 -29.9	4.6 +3.9	100.9 -0.4	usable	8 Ω vs 4 Ω: amp load changes	+
JBL MI-15	55 +3	0.616 +0.09	169.9 +6.9	3.4 +2.7	99.1 -2.2	usable	8 Ω vs 4 Ω: amp load changes · 150 W vs 225 W: lower power handling	+
Audax PR380T0 vp_d	50.5 -1.5	0.472 -0.05	137.8 -25.2	3.3 +2.6	98.8 -2.5	usable	8 Ω vs 4 Ω: amp load changes · 150 W vs 225 W: lower power handling	+

Compare the closest 3 against the COMMONWEALTH 15 →

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.