Beyma SM115/K vp2

15" · 8 Ω · 500 W · 99 dB · datasheet ↗

Thiele-Small parameters

Nominal size	15"
Impedance	8 Ω
Fs	29.8 Hz
Qts	0.228
Qes	0.232
Qms	11.779
Vas	291 L
Sd	880 cm²
Xmax	8 mm
Re	5.21 Ω
Bl	21.2 T·m
Mms	106.6 g
Pe	500 W
Sensitivity	99 dB

Alignment hint

EBP	128 · ported
Sealed Vb (Qtc ≈ 0.71)	≈ 33.8 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
Beyma SM115/K vp1	27.6 -2.2	0.222 -0.01	296.7 +5.7	8 =	98.3 -0.7	close		+
STX W.38.800.4.MC	27 -2.8	0.219 -0.01	272 -19	8 =	99.9 +0.9	close	4 Ω vs 8 Ω: amp load changes	+
Infinity BETA15	24.4 -5.4	0.23 =	289.9 -1.1	7.9 -0.1	98.1 -0.9	close	4 Ω vs 8 Ω: amp load changes · 350 W vs 500 W: lower power handling · Xmax 7.9 mm < 8 mm: lower excursion-limited SPL	+
Beyma SM115/K	29 -0.8	0.249 +0.02	273 -18	8 =	97.2 -1.8	close		+
Beyma 15BR400	30 +0.2	0.236 +0.01	274 -17	6 -2	98.3 -0.7	close	Xmax 6 mm < 8 mm: lower excursion-limited SPL	+
Precision Devices PD1550	31 +1.2	0.21 -0.02	242 -49	12 +4	99 =	close		+
RCF L 15/541	30.9 +1.1	0.236 +0.01	300 +9	5.6 -2.4	98.1 -0.9	close	200 W vs 500 W: lower power handling · Xmax 5.6 mm < 8 mm: lower excursion-limited SPL	+
Beyma 15GT200 v1	30.4 +0.6	0.223 -0.01	270 -21	5.5 -2.5	98.4 -0.6	close	250 W vs 500 W: lower power handling · Xmax 5.5 mm < 8 mm: lower excursion-limited SPL	+
PD PD 1550	31 +1.2	0.212 -0.02	242 -49	7.4 -0.6	98.1 -0.9	close	Xmax 7.4 mm < 8 mm: lower excursion-limited SPL	+
Precision Devices PD 1550	31 +1.2	0.212 -0.02	242 -49	7.4 -0.6	98.1 -0.9	close	Xmax 7.4 mm < 8 mm: lower excursion-limited SPL	+

Compare the closest 3 against the SM115/K vp2 →

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.