Beyma SM115 vp4

15" · 8 Ω · 400 W · 99 dB · datasheet ↗

Thiele-Small parameters

Nominal size	15"
Impedance	8 Ω
Fs	35.5 Hz
Qts	0.339
Qes	0.37
Qms	4.09
Vas	310.6 L
Sd	881.4 cm²
Xmax	7.3 mm
Re	5.98 Ω
Bl	15.9 T·m
Mms	70.5 g
Pe	400 W
Sensitivity	99 dB

Alignment hint

EBP	96 · flexible
Sealed Vb (Qtc ≈ 0.71)	≈ 92.7 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
Beyma SM115 vp1	35.9 +0.4	0.355 +0.02	314.2 +3.6	7.3 =	98.5 -0.5	close		+
Beyma SM115 vp3	35 -0.5	0.335 =	282.9 -27.7	7.3 =	97.9 -1.1	close		+
Beyma SM115 vp2	35.4 -0.1	0.365 +0.03	295.8 -14.8	7.3 =	98.2 -0.8	close		+
AE Speakers TD15M	34.7 -0.8	0.327 -0.01	312 +1.4	6 -1.3	98.5 -0.5	close	250 W vs 400 W: lower power handling · Xmax 6 mm < 7.3 mm: lower excursion-limited SPL	+
AE Speakers TD15M 8 Ohms	34.7 -0.8	0.327 -0.01	312 +1.4	6 -1.3	98.5 -0.5	close	250 W vs 400 W: lower power handling · Xmax 6 mm < 7.3 mm: lower excursion-limited SPL	+
Beyma SM115 v2	35 -0.5	0.315 -0.02	276 -34.6	7.3 =	98.4 -0.6	close		+
Focal 38WX4	28.9 -6.6	0.364 +0.02	310.4 -0.2	7.7 +0.4	99.2 +0.2	close	4 Ω vs 8 Ω: amp load changes · 225 W vs 400 W: lower power handling	+
AE Speakers TD15M 4 Ohms	34.7 -0.8	0.327 -0.01	312 +1.4	6 -1.3	102.1 +3.1	close	4 Ω vs 8 Ω: amp load changes · 250 W vs 400 W: lower power handling · Xmax 6 mm < 7.3 mm: lower excursion-limited SPL	+
PD PDN 15BR40	35.7 +0.2	0.338 =	224.8 -85.8	9.8 +2.5	98.5 -0.5	close		+
Precision Devices PDN 15BR40	35.7 +0.2	0.338 =	224.8 -85.8	9.8 +2.5	98.5 -0.5	close		+

Compare the closest 3 against the SM115 vp4 →

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.