BMS 15N820

15" · 8 Ω · 900 W · 98 dB

Thiele-Small parameters

Nominal size	15"
Impedance	8 Ω
Fs	39.2 Hz
Qts	0.26
Qes	0.27
Qms	4.5
Vas	159 L
Sd	880 cm²
Xmax	4.5 mm
Re	5.7 Ω
Bl	24.2 T·m
Mms	114 g
Pe	900 W
Sensitivity	98 dB

Alignment hint

EBP	145 · ported
Sealed Vb (Qtc ≈ 0.71)	≈ 24.9 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
BMS 15N820 v2015	39.2 =	0.255 -0.01	159 =	5 +0.5	99 +1	close		+
P.Audio C15-500LF	39 -0.2	0.261 =	165 +6	5 +0.5	99.3 +1.3	close	500 W vs 900 W: lower power handling	+
BMS 15S320	41 +1.8	0.28 +0.02	154 -5	4.5 =	98 =	close	500 W vs 900 W: lower power handling	+
McCauley 6244	40 +0.8	0.272 +0.01	144.4 -14.6	4.6 +0.1	98.4 +0.4	close	400 W vs 900 W: lower power handling	+
SICA 15 K3 PL-8	40 +0.8	0.27 +0.01	166.1 +7.1	6.5 +2	97.6 -0.4	close	400 W vs 900 W: lower power handling	+
B&C 15 PS 76	38 -1.2	0.266 +0.01	164 +5	6.3 +1.8	98.9 +0.9	close	550 W vs 900 W: lower power handling	+
B&C 15PS76-8	38 -1.2	0.26 =	164 +5	7.5 +3	99 +1	close	550 W vs 900 W: lower power handling	+
PD PD 152	40 +0.8	0.266 +0.01	170 +11	5.1 +0.6	99.3 +1.3	close	400 W vs 900 W: lower power handling	+
Precision Devices PD 152	40 +0.8	0.266 +0.01	170 +11	5.1 +0.6	99.3 +1.3	close	400 W vs 900 W: lower power handling	+
BMS 15N830V2	39.5 +0.3	0.27 +0.01	159 =	8 +3.5	97.1 -0.9	close	6 Ω vs 8 Ω: amp load changes · 550 W vs 900 W: lower power handling	+

Compare the closest 3 against the 15N820 →

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.