Beyma SM115/K

15" · 8 Ω · 500 W · 97.2 dB · datasheet ↗

Thiele-Small parameters

Nominal size	15"
Impedance	8 Ω
Fs	29 Hz
Qts	0.249
Qes	0.26
Qms	5.8
Vas	273 L
Sd	880 cm²
Xmax	8 mm
Re	6.1 Ω
Bl	22.6 T·m
Mms	119.8 g
Pe	500 W
Sensitivity	97.2 dB

Alignment hint

EBP	112 · ported
Sealed Vb (Qtc ≈ 0.71)	≈ 38.6 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
STX W.38.800.8.MC	28 -1	0.252 =	247 -26	8 =	96.5 -0.7	close		+
RCF L 15P200/A	29 =	0.291 +0.04	280 +7	8.9 +0.9	96.6 -0.6	close	300 W vs 500 W: lower power handling	+
Beyma SM115/K vp2	29.8 +0.8	0.228 -0.02	291 +18	8 =	99 +1.8	close		+
RCF L 15P200 v1983	29 =	0.291 +0.04	280 +7	7.4 -0.6	96.6 -0.6	close	300 W vs 500 W: lower power handling · Xmax 7.4 mm < 8 mm: lower excursion-limited SPL	+
Beyma SM-115/K	27 -2	0.253 =	345 +72	8 =	97.5 +0.3	close		+
Beyma SM115/K vp1	27.6 -1.4	0.222 -0.03	296.7 +23.7	8 =	98.3 +1.1	close		+
Beyma 15BR400	30 +1	0.236 -0.01	274 +1	6 -2	98.3 +1.1	close	Xmax 6 mm < 8 mm: lower excursion-limited SPL	+
Ciare NDH 15-4S	28 -1	0.254 +0.01	220 -53	11.5 +3.5	95.9 -1.3	close		+
JBL 1501FE	29.5 +0.5	0.236 -0.01	217.7 -55.3	6.9 -1.1	97.2 =	close	Xmax 6.9 mm < 8 mm: lower excursion-limited SPL	+
STX W.38.800.4.MC	27 -2	0.219 -0.03	272 -1	8 =	99.9 +2.7	close	4 Ω vs 8 Ω: amp load changes	+

Compare the closest 3 against the SM115/K →

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.