BMS 15N820 v2015

15" · 8 Ω · 900 W · 99 dB · datasheet ↗

Thiele-Small parameters

Nominal size	15"
Impedance	8 Ω
Fs	39.2 Hz
Qts	0.255
Qes	0.27
Qms	4.5
Vas	159 L
Sd	880 cm²
Xmax	5 mm
Re	5.7 Ω
Bl	24.2 T·m
Mms	112.5 g
Pe	900 W
Sensitivity	99 dB

Alignment hint

EBP	145 · ported
Sealed Vb (Qtc ≈ 0.71)	≈ 23.8 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
P.Audio C15-500LF	39 -0.2	0.261 +0.01	165 +6	5 =	99.3 +0.3	close	500 W vs 900 W: lower power handling	+
BMS 15N820	39.2 =	0.26 +0.01	159 =	4.5 -0.5	98 -1	close	Xmax 4.5 mm < 5 mm: lower excursion-limited SPL	+
B&C 15PS76-8	38 -1.2	0.26 +0.01	164 +5	7.5 +2.5	99 =	close	550 W vs 900 W: lower power handling	+
PD PD 152	40 +0.8	0.266 +0.01	170 +11	5.1 +0.1	99.3 +0.3	close	400 W vs 900 W: lower power handling	+
Precision Devices PD 152	40 +0.8	0.266 +0.01	170 +11	5.1 +0.1	99.3 +0.3	close	400 W vs 900 W: lower power handling	+
Oberton 15NB451	39.57 +0.37	0.257 =	145.21 -13.79	7 +2	99 =	close	450 W vs 900 W: lower power handling	+
PD PD 158	39.9 +0.7	0.241 -0.01	161.9 +2.9	5.9 +0.9	99.4 +0.4	close	600 W vs 900 W: lower power handling	+
Precision Devices PD 158	39.9 +0.7	0.241 -0.01	161.9 +2.9	5.9 +0.9	99.4 +0.4	close	600 W vs 900 W: lower power handling	+
B&C 15 PS 76	38 -1.2	0.266 +0.01	164 +5	6.3 +1.3	98.9 -0.1	close	550 W vs 900 W: lower power handling	+
Precision Devices PD152	40 +0.8	0.269 +0.01	170 +11	5.5 +0.5	99 =	close	16 Ω vs 8 Ω: amp load changes · 400 W vs 900 W: lower power handling	+

Compare the closest 3 against the 15N820 v2015 →

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.