Beyma 18GT200 v1

18" · 8 Ω · 250 W · 99.3 dB · datasheet ↗

Thiele-Small parameters

Nominal size	18"
Impedance	8 Ω
Fs	24.6 Hz
Qts	0.213
Qes	0.22
Qms	7.11
Vas	595 L
Sd	1320 cm²
Xmax	5.8 mm
Re	6 Ω
Bl	26.9 T·m
Mms	171.8 g
Pe	250 W
Sensitivity	99.3 dB

Alignment hint

EBP	112 · ported
Sealed Vb (Qtc ≈ 0.71)	≈ 59.4 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
Altec 3184	24 -0.6	0.219 +0.01	690.9 +95.9	6.4 +0.6	98.5 -0.8	close		+
Great Plains Audio 3184 GPA	24 -0.6	0.219 +0.01	690.9 +95.9	6.4 +0.6	98.5 -0.8	close		+
McCauley B1860	23.9 -0.7	0.244 +0.03	723.6 +128.6	5.5 -0.3	99.1 -0.2	close	Xmax 5.5 mm < 5.8 mm: lower excursion-limited SPL	+
Electro-Voice DL18MT	24 -0.6	0.269 +0.06	580.5 -14.5	5.59 -0.21	96.6 -2.7	usable	Xmax 5.59 mm < 5.8 mm: lower excursion-limited SPL	+
RCF LP 18/551	21.7 -2.9	0.222 +0.01	760 +165	10 +4.2	98.8 -0.5	usable		+
JBL 2240H/G	30 +5.4	0.23 +0.02	480 -115	5.5 -0.3	99 -0.3	usable	Xmax 5.5 mm < 5.8 mm: lower excursion-limited SPL	+
Eminence SIGMA PRO 18 A2 (prodance)	26 +1.4	0.299 +0.09	613 +18	6.1 +0.3	98.3 -1	usable		+
Eminence B-52	22.8 -1.8	0.229 +0.02	430 -165	6 +0.2	96.6 -2.7	usable		+
JBL 2240H	30 +5.4	0.224 +0.01	481.4 -113.6	5.1 -0.7	100.4 +1.1	usable	Xmax 5.1 mm < 5.8 mm: lower excursion-limited SPL	+
Dayton Audio PA460-8 18	26.2 +1.6	0.269 +0.06	473.5 -121.5	6 +0.2	98.6 -0.7	usable		+

Compare the closest 3 against the 18GT200 v1 →

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.