Beyma 18P1200Nd vp459

18" · 8 Ω · 1200 W · 98.3 dB · datasheet ↗

Thiele-Small parameters

Nominal size	18"
Impedance	8 Ω
Fs	43.8 Hz
Qts	0.376
Qes	0.39
Qms	10.12
Vas	124.9 L
Sd	1256.6 cm²
Xmax	6.3 mm
Re	5.04 Ω
Bl	28.8 T·m
Mms	234 g
Pe	1200 W
Sensitivity	98.3 dB

Alignment hint

EBP	112 · ported
Sealed Vb (Qtc ≈ 0.71)	≈ 49.2 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 18P1200Nd vp1	43.8 =	0.376 =	116.9 -8	6.1 -0.2	98 -0.3	close	Xmax 6.1 mm < 6.3 mm: lower excursion-limited SPL	+
PRV Audio 18SW3000	43.7 -0.1	0.342 -0.03	111.3 -13.6	6.7 +0.4	98.1 -0.2	close		+
PD PD 1852	40 -3.8	0.33 -0.05	129.1 +4.2	6.2 -0.1	97.2 -1.1	close	Xmax 6.2 mm < 6.3 mm: lower excursion-limited SPL	+
Precision Devices PD 1852	40 -3.8	0.33 -0.05	129.1 +4.2	6.2 -0.1	97.2 -1.1	close	Xmax 6.2 mm < 6.3 mm: lower excursion-limited SPL	+
P.Audio C18-650EL v2009	45 +1.2	0.375 =	158.3 +33.4	5.3 -1	99.4 +1.1	close	Xmax 5.3 mm < 6.3 mm: lower excursion-limited SPL	+
Beyma 18P100FE	40 -3.8	0.39 +0.01	163.2 +38.3	7.1 +0.8	98.1 -0.2	close		+
MAG Audio M 1805	37.5 -6.3	0.357 -0.02	138.5 +13.6	7.1 +0.8	96.7 -1.6	close		+
Celestion CF1840JD	44.2 +0.4	0.444 +0.07	113.9 -11	8.5 +2.2	96.8 -1.5	close		+
B&C 18 PZB 46	37 -6.8	0.374 =	155 +30.1	6.5 +0.2	96.8 -1.5	usable	700 W vs 1200 W: lower power handling	+
LaVoce SAN184.02	38 -5.8	0.406 +0.03	150 +25.1	7.9 +1.6	96.8 -1.5	usable		+

Compare the closest 3 against the 18P1200Nd vp459 →

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.