Beyma SM-115

15" · 8 Ω · 400 W · 99.7 dB · datasheet ↗

Thiele-Small parameters

Nominal size	15"
Impedance	8 Ω
Fs	35 Hz
Qts	0.282
Qes	0.3
Qms	4.57
Vas	331 L
Sd	880 cm²
Xmax	6.7 mm
Re	6.4 Ω
Bl	17.8 T·m
Mms	67.8 g
Pe	400 W
Sensitivity	99.7 dB

Alignment hint

EBP	117 · ported
Sealed Vb (Qtc ≈ 0.71)	≈ 62.6 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
Beyma 15LW30	32 -3	0.28 =	325 -6	7 +0.3	98.8 -0.9	close		+
Focal AUDIOM 15H	34.9 -0.1	0.277 =	295.9 -35.1	5.8 -0.9	99.7 =	close	225 W vs 400 W: lower power handling · Xmax 5.8 mm < 6.7 mm: lower excursion-limited SPL	+
Focal AUDIOM 15B	31.6 -3.4	0.282 =	330 -1	6 -0.7	98.8 -0.9	close	225 W vs 400 W: lower power handling · Xmax 6 mm < 6.7 mm: lower excursion-limited SPL	+
Beyma 15XA38ND	33 -2	0.288 +0.01	359 +28	6 -0.7	99 -0.7	close	Xmax 6 mm < 6.7 mm: lower excursion-limited SPL	+
Celestion BX15-4085HS8	35 =	0.27 -0.01	247.6 -83.4	6.5 -0.2	99.3 -0.4	close	Xmax 6.5 mm < 6.7 mm: lower excursion-limited SPL	+
Beyma SM115 vp4	35.5 +0.5	0.339 +0.06	310.6 -20.4	7.3 +0.6	99 -0.7	close		+
Max Speaker PR1566	36 +1	0.296 +0.01	262 -69	8.6 +1.9	99.1 -0.6	close		+
Beyma SM115 v2	35 =	0.315 +0.03	276 -55	7.3 +0.6	98.4 -1.3	close		+
AE Speakers TD15M	34.7 -0.3	0.327 +0.05	312 -19	6 -0.7	98.5 -1.2	close	250 W vs 400 W: lower power handling · Xmax 6 mm < 6.7 mm: lower excursion-limited SPL	+
AE Speakers TD15M 8 Ohms	34.7 -0.3	0.327 +0.05	312 -19	6 -0.7	98.5 -1.2	close	250 W vs 400 W: lower power handling · Xmax 6 mm < 6.7 mm: lower excursion-limited SPL	+

Compare the closest 3 against the SM-115 →

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.