EMS B15 MKII

15" · 8 Ω · 100 W · 99.3 dB · datasheet ↗

Thiele-Small parameters

Nominal size	15"
Impedance	8 Ω
Fs	19 Hz
Qts	0.167
Qes	0.178
Qms	2.672
Vas	1094 L
Sd	800 cm²
Xmax	7 mm
Re	6.23 Ω
Bl	15.5 T·m
Mms	57.5 g
Pe	100 W
Sensitivity	99.3 dB

Alignment hint

EBP	107 · ported
Sealed Vb (Qtc ≈ 0.71)	≈ 64.6 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
Fertin Acoustics 38EX-10V	20 +1	0.17 =	935 -159	3 -4	100.2 +0.9	usable	Xmax 3 mm < 7 mm: lower excursion-limited SPL	+
EMS B15EX-12.5V	22 +3	0.146 -0.02	791 -303	5.4 -1.6	100.4 +1.1	usable	Xmax 5.4 mm < 7 mm: lower excursion-limited SPL	+
EMS B15EX	22 +3	0.223 +0.06	791 -303	7 =	98.5 -0.8	usable		+
Focal AUDIOM 15A	21.5 +2.5	0.223 +0.06	832 -262	6 -1	98.8 -0.5	usable	Xmax 6 mm < 7 mm: lower excursion-limited SPL	+
Electro-Voice DL 15W	21 +2	0.164 =	575 -519	5.6 -1.4	98.2 -1.1	usable	Xmax 5.6 mm < 7 mm: lower excursion-limited SPL	+
EMS B15EX-07.5V	22 +3	0.228 +0.06	791 -303	7 =	98.4 -0.9	usable		+
JBL 1501AL-1	19 =	0.191 +0.02	630 -464	6.4 -0.6	94.6 -4.7	usable	16 Ω vs 8 Ω: amp load changes · Xmax 6.4 mm < 7 mm: lower excursion-limited SPL	+
Supravox 400 GMF MK2	22 +3	0.206 +0.04	633 -461	7 =	97.9 -1.4	usable		+
Audax PR38SM250	19.5 +0.5	0.177 +0.01	660 -434	4 -3	97.7 -1.6	usable	Xmax 4 mm < 7 mm: lower excursion-limited SPL	+
Focal AUDIOM 15VX v2	18.4 -0.6	0.224 +0.06	727 -367	6 -1	96.1 -3.2	usable	Xmax 6 mm < 7 mm: lower excursion-limited SPL	+

Compare the closest 3 against the B15 MKII →

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.