Beyma 18G50 vp

18" · 8 Ω · 750 W · 98.1 dB · datasheet ↗

Thiele-Small parameters

Nominal size	18"
Impedance	8 Ω
Fs	39 Hz
Qts	0.365
Qes	0.376
Qms	12.48
Vas	204.9 L
Sd	1320 cm²
Xmax	6.4 mm
Re	6.29 Ω
Bl	28.5 T·m
Mms	198.8 g
Pe	750 W
Sensitivity	98.1 dB

Alignment hint

EBP	104 · ported
Sealed Vb (Qtc ≈ 0.71)	≈ 74.4 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
Beyma 18G550	36 -3	0.374 +0.01	210 +5.1	8.1 +1.7	97.8 -0.3	close		+
Beyma 18G550 v2015	36 -3	0.374 +0.01	210 +5.1	8.1 +1.7	97.8 -0.3	close		+
RCF LF 18P400	39.5 +0.5	0.391 +0.03	201 -3.9	8 +1.6	99 +0.9	close		+
B&C 18PZW100	37 -2	0.36 -0.01	186 -18.9	8 +1.6	97.6 -0.5	close		+
RCF L 18/851KN	39 =	0.357 -0.01	200 -4.9	5 -1.4	98.4 +0.3	close	500 W vs 750 W: lower power handling · Xmax 5 mm < 6.4 mm: lower excursion-limited SPL	+
Beyma 18P1200Nd	37 -2	0.339 -0.03	198 -6.9	8.4 +2	98.3 +0.2	close		+
PD PDN 18SB40	38.5 -0.5	0.326 -0.04	201.3 -3.6	6 -0.4	98.6 +0.5	close	Xmax 6 mm < 6.4 mm: lower excursion-limited SPL	+
Precision Devices PDN 18SB40	38.5 -0.5	0.326 -0.04	201.3 -3.6	6 -0.4	98.6 +0.5	close	Xmax 6 mm < 6.4 mm: lower excursion-limited SPL	+
Elder Audio 18LB100-8A	40 +1	0.425 +0.06	208 +3.1	6.4 =	98.3 +0.2	close		+
Faital PRO 18HP1060	35 -4	0.37 +0.01	200.3 -4.6	12.45 +6.05	98 -0.1	close		+

Compare the closest 3 against the 18G50 vp →

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.