BMS 8S215

8" · 8 Ω · 200 W · 96 dB

Thiele-Small parameters

Nominal size	8"
Impedance	8 Ω
Fs	87.7 Hz
Qts	0.31
Qes	0.33
Qms	4.4
Vas	11.04 L
Sd	222 cm²
Xmax	4.25 mm
Re	5.4 Ω
Bl	13.6 T·m
Mms	20.6 g
Pe	200 W
Sensitivity	96 dB

Alignment hint

EBP	266 · ported
Sealed Vb (Qtc ≈ 0.71)	≈ 2.6 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
BMS 8N515	87.7 =	0.3 -0.01	11.04 =	4 -0.25	96 =	close	Xmax 4 mm < 4.25 mm: lower excursion-limited SPL	+
LaVoce WAN082.01	85 -2.7	0.32 +0.01	9 -2.04	5.8 +1.55	96 =	close		+
Oberton 8NMB250v4	82.03 -5.67	0.258 -0.05	10.89 -0.15	4.5 +0.25	96 =	close		+
18 Sound 8NTLW2000	74 -13.7	0.26 -0.05	11.3 +0.26	4.4 +0.15	96.5 +0.5	usable	16 Ω vs 8 Ω: amp load changes	+
Sica 8 N 2.5 PL	77 -10.7	0.3 -0.01	13.7 +2.66	3.5 -0.75	96.4 +0.4	usable	Xmax 3.5 mm < 4.25 mm: lower excursion-limited SPL	+
LaVoce WAF082.00	78 -9.7	0.37 +0.06	11.92 +0.88	6.3 +2.05	95 -1	usable		+
B&C 8NDL64	80 -7.7	0.25 -0.06	9.6 -1.44	4.5 +0.25	97 +1	usable		+
Faital PRO 8PR155	85 -2.7	0.37 +0.06	9.4 -1.64	3.57 -0.68	97 +1	usable	Xmax 3.57 mm < 4.25 mm: lower excursion-limited SPL	+
BMS 8N519	74.9 -12.8	0.37 +0.06	10.9 -0.14	6.3 +2.05	94 -2	usable		+
B&C 8NW51	76 -11.7	0.25 -0.06	10.6 -0.44	6 +1.75	97 +1	usable	4 Ω vs 8 Ω: amp load changes	+

Compare the closest 3 against the 8S215 →

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.