18 Sound 8MB500

8" · 8 Ω · 280 W · 95 dB · datasheet ↗

Thiele-Small parameters

Nominal size	8"
Impedance	8 Ω
Fs	74 Hz
Qts	0.43
Qes	0.51
Qms	2.66
Vas	21.5 L
Sd	230 cm²
Xmax	6 mm
Re	5.1 Ω
Bl	9 T·m
Mms	17 g
Pe	280 W
Sensitivity	95 dB

Alignment hint

EBP	145 · ported
Sealed Vb (Qtc ≈ 0.71)	≈ 12.6 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
18 Sound 8MB500	73 -1	0.5 +0.07	21.3 -0.2	6 =	95 =	close	16 Ω vs 8 Ω: amp load changes	+
18 Sound 8NMB420	66 -8	0.41 -0.02	24.53 +3.03	5.8 -0.2	95 =	close	16 Ω vs 8 Ω: amp load changes · Xmax 5.8 mm < 6 mm: lower excursion-limited SPL	+
B&C 8FMB51	68 -6	0.39 -0.04	20.5 -1	5.5 -0.5	96 +1	close	16 Ω vs 8 Ω: amp load changes · Xmax 5.5 mm < 6 mm: lower excursion-limited SPL	+
B&C 8MBX51	68 -6	0.38 -0.05	22 +0.5	6 =	97 +2	close	16 Ω vs 8 Ω: amp load changes · 200 W vs 280 W: lower power handling	+
18 Sound 8MB500	73 -1	0.36 -0.07	18.4 -3.1	6 =	95 =	close	4 Ω vs 8 Ω: amp load changes	+
Faital PRO 8FE300	70 -4	0.44 +0.01	15.7 -5.8	5.52 -0.48	95 =	close	Xmax 5.52 mm < 6 mm: lower excursion-limited SPL	+
18 Sound 8MB400	64 -10	0.38 -0.05	23.9 +2.4	5.8 -0.2	95 =	close	Xmax 5.8 mm < 6 mm: lower excursion-limited SPL	+
Beyma 8"G40	70 -4	0.36 -0.07	17 -4.5	6.5 +0.5	95 =	usable		+
Faital PRO 8PR150	75 +1	0.48 +0.05	16.2 -5.3	5 -1	94 -1	usable	Xmax 5 mm < 6 mm: lower excursion-limited SPL	+
Faital PRO 8FE200	80 +6	0.45 +0.02	15.8 -5.7	4.62 -1.38	95 =	usable	4 Ω vs 8 Ω: amp load changes · 130 W vs 280 W: lower power handling · Xmax 4.62 mm < 6 mm: lower excursion-limited SPL	+

Compare the closest 3 against the 8MB500 →

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.