18 Sound 15W500

15" · 8 Ω · 350 W · 100.5 dB · datasheet ↗

Thiele-Small parameters

Nominal size	15"
Impedance	8 Ω
Fs	50 Hz
Qts	0.52
Qes	0.55
Qms	9.64
Vas	189 L
Sd	850 cm²
Xmax	4 mm
Re	5.2 Ω
Bl	12.6 T·m
Mms	55 g
Pe	350 W
Sensitivity	100.5 dB

Alignment hint

EBP	91 · flexible
Sealed Vb (Qtc ≈ 0.71)	≈ 222.6 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
Celestion G15Z-200 CE	45 -5	0.497 -0.02	190.1 +1.1	4 =	98.4 -2.1	close	200 W vs 350 W: lower power handling	+
Eminence 040580-67-95380096-151035	44.5 -5.5	0.538 +0.02	204.9 +15.9	5.6 +1.6	100.3 -0.2	close	4 Ω vs 8 Ω: amp load changes	+
Celestion BL15-150	49 -1	0.593 +0.07	179.8 -9.2	4.3 +0.3	98.4 -2.1	close	150 W vs 350 W: lower power handling	+
RCF L 15P854K	47 -3	0.518 =	177 -12	10 +6	99 -1.5	close		+
Celestion 15 Professional Woofer - OEM	46.9 -3.1	0.497 -0.02	175 -14	3.5 -0.5	98.8 -1.7	close	150 W vs 350 W: lower power handling · Xmax 3.5 mm < 4 mm: lower excursion-limited SPL	+
LaVoce WSF152.02	43 -7	0.527 +0.01	210 +21	4.3 +0.3	98.3 -2.2	close	200 W vs 350 W: lower power handling	+
Beyma 15 KX	45 -5	0.496 -0.02	203 +14	3.5 -0.5	99 -1.5	close	Xmax 3.5 mm < 4 mm: lower excursion-limited SPL	+
Beyma 15KX	45 -5	0.496 -0.02	203 +14	3.5 -0.5	99 -1.5	close	Xmax 3.5 mm < 4 mm: lower excursion-limited SPL	+
JBL 2033H	50 =	0.417 -0.1	170 -19	4.9 +0.9	100.7 +0.2	close		+
Celestion BL15-300X	48 -2	0.447 -0.07	158.8 -30.2	4.3 +0.3	101.3 +0.8	close	4 Ω vs 8 Ω: amp load changes	+

Compare the closest 3 against the 15W500 →

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.