Beyma 8"G40

8" · 8 Ω · 250 W · 95 dB · datasheet ↗

Thiele-Small parameters

Nominal size	8"
Impedance	8 Ω
Fs	70 Hz
Qts	0.36
Qes	0.38
Qms	6.8
Vas	17 L
Sd	220 cm²
Xmax	6.5 mm
Re	6.1 Ω
Mms	21 g
Pe	250 W
Sensitivity	95 dB

Alignment hint

EBP	184 · ported
Sealed Vb (Qtc ≈ 0.71)	≈ 5.9 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
18 Sound 8MB500	73 +3	0.36 =	18.4 +1.4	6 -0.5	95 =	close	4 Ω vs 8 Ω: amp load changes · Xmax 6 mm < 6.5 mm: lower excursion-limited SPL	+
Faital PRO 8PR200	58 -12	0.37 +0.01	16.9 -0.1	8.15 +1.65	95 =	close		+
Faital PRO 8PR210	65 -5	0.34 -0.02	15.7 -1.3	7.17 +0.67	94 -1	close	16 Ω vs 8 Ω: amp load changes	+
B&C 8NDL51	66 -4	0.37 +0.01	14 -3	7 +0.5	94 -1	close		+
Faital PRO 8FE300	70 =	0.44 +0.08	15.7 -1.3	5.52 -0.98	95 =	close	Xmax 5.52 mm < 6.5 mm: lower excursion-limited SPL	+
Oberton 8MB201	67.7 -2.3	0.314 -0.05	14.74 -2.26	7 +0.5	93 -2	close		+
B&C 8FMB51	68 -2	0.39 +0.03	20.5 +3.5	5.5 -1	96 +1	usable	16 Ω vs 8 Ω: amp load changes · Xmax 5.5 mm < 6.5 mm: lower excursion-limited SPL	+
Faital PRO 8PR210	65 -5	0.29 -0.07	15.4 -1.6	6.92 +0.42	95 =	usable		+
Sica 8 Fe 2 CP	67 -3	0.32 -0.04	16.9 -0.1	4.5 -2	94.6 -0.4	usable	Xmax 4.5 mm < 6.5 mm: lower excursion-limited SPL	+
B&C 8MBX51	68 -2	0.38 +0.02	22 +5	6 -0.5	97 +2	usable	16 Ω vs 8 Ω: amp load changes · Xmax 6 mm < 6.5 mm: lower excursion-limited SPL	+

Compare the closest 3 against the 8"G40 →

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.