EMS B15EX-12.5V

15" · 8 Ω · 100 W · 100.4 dB · datasheet ↗

Thiele-Small parameters

Nominal size	15"
Impedance	8 Ω
Fs	22 Hz
Qts	0.146
Qes	0.149
Qms	7.068
Vas	791 L
Sd	855 cm²
Xmax	5.4 mm
Re	6.54 Ω
Bl	20.3 T·m
Mms	67.8 g
Pe	100 W
Sensitivity	100.4 dB

Alignment hint

EBP	148 · ported
Sealed Vb (Qtc ≈ 0.71)	≈ 35.2 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
Electro-Voice DL 15W	21 -1	0.164 +0.02	575 -216	5.6 +0.2	98.2 -2.2	usable		+
Fluxmag 1504-CX	25.2 +3.2	0.158 +0.01	659.1 -131.9	4 -1.4	101.1 +0.7	usable	Xmax 4 mm < 5.4 mm: lower excursion-limited SPL	+
EMS B15EX	22 =	0.223 +0.08	791 =	7 +1.6	98.5 -1.9	usable		+
EMS B15 MKII	19 -3	0.167 +0.02	1094 +303	7 +1.6	99.3 -1.1	usable		+
Focal AUDIOM 15A	21.5 -0.5	0.223 +0.08	832 +41	6 +0.6	98.8 -1.6	usable		+
EMS B15EX-07.5V	22 =	0.228 +0.08	791 =	7 +1.6	98.4 -2	usable		+
Altec 515E	22.9 +0.9	0.185 +0.04	665.5 -125.5	4.6 -0.8	96.5 -3.9	usable	16 Ω vs 8 Ω: amp load changes · 75 W vs 100 W: lower power handling · Xmax 4.6 mm < 5.4 mm: lower excursion-limited SPL	+
Supravox 400 GMF MK2	22 =	0.206 +0.06	633 -158	7 +1.6	97.9 -2.5	usable		+
Fertin Acoustics 38EX-10V	20 -2	0.17 +0.02	935 +144	3 -2.4	100.2 -0.2	usable	Xmax 3 mm < 5.4 mm: lower excursion-limited SPL	+
Gauss 3580 GAUSS	25 +3	0.16 +0.01	438.9 -352.1	5.1 -0.3	99.2 -1.2	usable	Xmax 5.1 mm < 5.4 mm: lower excursion-limited SPL	+

Compare the closest 3 against the B15EX-12.5V →

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.