Beyma 8"BR40/N

8" · 8 Ω · 50 W · 91 dB · datasheet ↗

Thiele-Small parameters

Nominal size	8"
Impedance	8 Ω
Fs	30 Hz
Qts	0.39
Qes	0.48
Qms	2.1
Vas	89.1 L
Sd	220 cm²
Xmax	6.7 mm
Re	5.5 Ω
Bl	6.8 T·m
Mms	21 g
Pe	50 W
Sensitivity	91 dB

Alignment hint

EBP	63 · flexible
Sealed Vb (Qtc ≈ 0.71)	≈ 39 L

EBP 50-100: works in either a sealed or ported 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
Sica 8 H 2 CP	39.1 +9.1	0.43 +0.04	35.9 -53.2	6.5 -0.2	89.7 -1.3	risky	Xmax 6.5 mm < 6.7 mm: lower excursion-limited SPL	+
Beyma 8NMFW	37 +7	0.34 -0.05	27 -62.1	9 +2.3	90 -1	risky		+
Faital PRO 8RS340	42 +12	0.34 -0.05	25.5 -63.6	7.33 +0.63	91 =	risky		+
Faital PRO 8RS350	42 +12	0.3 -0.09	23.7 -65.4	7.37 +0.67	90 -1	risky		+
B&C 8BG51	52 +22	0.4 +0.01	18 -71.1	6.5 -0.2	92 +1	risky	Xmax 6.5 mm < 6.7 mm: lower excursion-limited SPL	+
18 Sound 8NTLS2000	43 +13	0.24 -0.15	30 -59.1	7.4 +0.7	93.5 +2.5	risky	4 Ω vs 8 Ω: amp load changes	+
18 Sound 8NTLS2000	42 +12	0.24 -0.15	28 -61.1	7.4 +0.7	93 +2	risky	16 Ω vs 8 Ω: amp load changes	+
LaVoce FBASS08-18	53 +23	0.4 +0.01	23.64 -65.46	4.5 -2.2	92.5 +1.5	risky	Xmax 4.5 mm < 6.7 mm: lower excursion-limited SPL	+
B&C 8FG51	49 +19	0.32 -0.07	20 -69.1	6.5 -0.2	93 +2	risky	Xmax 6.5 mm < 6.7 mm: lower excursion-limited SPL	+
18 Sound 8NMB420	59 +29	0.31 -0.08	31 -58.1	5.8 -0.9	95 +4	risky	4 Ω vs 8 Ω: amp load changes · Xmax 5.8 mm < 6.7 mm: lower excursion-limited SPL	+

Compare the closest 3 against the 8"BR40/N →

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.