the box Speaker 15-300/8-A

15" · 8 Ω · 300 W · 96.8 dB · datasheet ↗

Thiele-Small parameters

Nominal size	15"
Impedance	8 Ω
Fs	52.6 Hz
Qts	0.64
Qes	0.67
Qms	14.08
Vas	100.3 L
Sd	855 cm²
Xmax	4.6 mm
Re	5.7 Ω
Bl	16.2 T·m
Mms	93.5 g
Pe	300 W
Sensitivity	96.8 dB

Alignment hint

EBP	79 · flexible
Sealed Vb (Qtc ≈ 0.71)	≈ 454.5 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 BL15-400X	54.2 +1.6	0.592 -0.05	110.9 +10.6	4.8 +0.2	97.3 +0.5	close		+
JBL 615H	55 +2.4	0.603 -0.04	112 +11.7	3.7 -0.9	98.1 +1.3	close	175 W vs 300 W: lower power handling · Xmax 3.7 mm < 4.6 mm: lower excursion-limited SPL	+
RCF LF 15G302 vp baptiste	56.8 +4.2	0.561 -0.08	87 -13.3	6 +1.4	97.1 +0.3	close		+
P.Audio BM-15LF	47 -5.6	0.668 +0.03	123.4 +23.1	7.1 +2.5	96.5 -0.3	close		+
Audax PR380T0	52 -0.6	0.635 -0.01	130 +29.7	3.3 -1.3	97.1 +0.3	usable	150 W vs 300 W: lower power handling · Xmax 3.3 mm < 4.6 mm: lower excursion-limited SPL	+
Beyma 15CMV2 v2021	49 -3.6	0.485 -0.16	104 +3.7	4.5 -0.1	96.7 -0.1	usable	Xmax 4.5 mm < 4.6 mm: lower excursion-limited SPL	+
Beyma 15CM V2	49 -3.6	0.49 -0.15	104 +3.7	7 +2.4	97 +0.2	usable		+
Focal 38KXSPL	45.8 -6.8	0.55 -0.09	116.4 +16.1	5.5 +0.9	98 +1.2	usable	4 Ω vs 8 Ω: amp load changes	+
PD PD 156 v2014	50.3 -2.3	0.469 -0.17	93.4 -6.9	5.7 +1.1	97.2 +0.4	usable		+
Precision Devices PD 156 v2014	50.3 -2.3	0.469 -0.17	93.4 -6.9	5.7 +1.1	97.2 +0.4	usable		+

Compare the closest 3 against the Speaker 15-300/8-A →

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.