Celestion BL15-300X

15" · 4 Ω · 300 W · 101.3 dB · datasheet ↗

Thiele-Small parameters

Nominal size	15"
Impedance	4 Ω
Fs	48 Hz
Qts	0.447
Qes	0.525
Qms	3.025
Vas	158.8 L
Sd	707 cm²
Xmax	4.3 mm
Re	3.15 Ω
Bl	9.4 T·m
Mms	48.5 g
Pe	300 W
Sensitivity	101.3 dB

Alignment hint

EBP	91 · flexible
Sealed Vb (Qtc ≈ 0.71)	≈ 105.7 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 2033H	50 +2	0.417 -0.03	170 +11.2	4.9 +0.6	100.7 -0.6	close	8 Ω vs 4 Ω: amp load changes	+
Jensen BN15/350SB vp	45 -3	0.461 +0.01	163 +4.2	5 +0.7	98.8 -2.5	close	8 Ω vs 4 Ω: amp load changes	+
Jensen BN15/350A vp	45 -3	0.461 +0.01	163.1 +4.3	5.5 +1.2	98.8 -2.5	close	8 Ω vs 4 Ω: amp load changes	+
B&C 15 CX 40	44 -4	0.43 -0.02	162 +3.2	4.5 +0.2	98.7 -2.6	close	8 Ω vs 4 Ω: amp load changes	+
Peavey 1505-8 DT	46.5 -1.5	0.389 -0.06	164.3 +5.5	5.1 +0.8	99.5 -1.8	close	8 Ω vs 4 Ω: amp load changes	+
Peavey 1505-8BW	46.5 -1.5	0.389 -0.06	164.3 +5.5	5.1 +0.8	99.5 -1.8	close	8 Ω vs 4 Ω: amp load changes	+
RCF L 15P530	45 -3	0.478 +0.03	160 +1.2	6.2 +1.9	98.5 -2.8	close	8 Ω vs 4 Ω: amp load changes	+
RCF MB 15X301 (prodance)	50.6 +2.6	0.44 -0.01	133.8 -25	5.9 +1.6	99.2 -2.1	close	8 Ω vs 4 Ω: amp load changes	+
SICA 15 CX 3 PL	44.5 -3.5	0.407 -0.04	152.4 -6.4	5.5 +1.2	99 -2.3	close	8 Ω vs 4 Ω: amp load changes	+
Eminence KAPPA PRO 15	47 -1	0.381 -0.07	167.7 +8.9	6.4 +2.1	100.2 -1.1	close	8 Ω vs 4 Ω: amp load changes	+

Compare the closest 3 against the BL15-300X →

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.