Beyma SM-115/K

15" · 8 Ω · 500 W · 97.5 dB · datasheet ↗

Thiele-Small parameters

Nominal size	15"
Impedance	8 Ω
Fs	27 Hz
Qts	0.253
Qes	0.26
Qms	9.01
Vas	345 L
Sd	880 cm²
Xmax	8 mm
Re	5.8 Ω
Bl	20.3 T·m
Mms	109.3 g
Pe	500 W
Sensitivity	97.5 dB

Alignment hint

EBP	104 · ported
Sealed Vb (Qtc ≈ 0.71)	≈ 50.7 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 15k200	27 =	0.262 +0.01	345 =	7.5 -0.5	97 -0.5	close	300 W vs 500 W: lower power handling · Xmax 7.5 mm < 8 mm: lower excursion-limited SPL	+
Dayton Audio 15LF ODEUM	25.5 -1.5	0.26 +0.01	331.3 -13.7	9.3 +1.3	96 -1.5	close		+
Dayton Audio APOLLO 15LF	25.5 -1.5	0.26 +0.01	331 -14	9.3 +1.3	96 -1.5	close		+
Scan-Speak 38WE/8582T00	26 -1	0.243 -0.01	423 +78	9.5 +1.5	97.5 =	close	350 W vs 500 W: lower power handling	+
Beyma SM115/K	29 +2	0.249 =	273 -72	8 =	97.2 -0.3	close		+
Beyma SM115/K vp1	27.6 +0.6	0.222 -0.03	296.7 -48.3	8 =	98.3 +0.8	close		+
Focal 38VX	22.3 -4.7	0.279 +0.03	347 +2	8.2 +0.2	96.9 -0.6	close	4 Ω vs 8 Ω: amp load changes · 225 W vs 500 W: lower power handling	+
STX W.38.800.8.MC	28 +1	0.252 =	247 -98	8 =	96.5 -1	close		+
Kenwood TRIO	27 =	0.27 +0.02	350 +5	5 -3	97.4 -0.1	close	300 W vs 500 W: lower power handling · Xmax 5 mm < 8 mm: lower excursion-limited SPL	+
Infinity BETA15	24.4 -2.6	0.23 -0.02	289.9 -55.1	7.9 -0.1	98.1 +0.6	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	+

Compare the closest 3 against the SM-115/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.