P.Audio C18-650EL v2009

18" · 8 Ω · 1200 W · 99.4 dB · datasheet ↗

Thiele-Small parameters

Nominal size	18"
Impedance	8 Ω
Fs	45 Hz
Qts	0.375
Qes	0.39
Qms	9.57
Vas	158.3 L
Sd	1250 cm²
Xmax	5.3 mm
Re	5.3 Ω
Bl	25.8 T·m
Mms	173.1 g
Pe	1200 W
Sensitivity	99.4 dB

Alignment hint

EBP	115 · ported
Sealed Vb (Qtc ≈ 0.71)	≈ 61.9 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
Beyma 18P100FE	40 -5	0.39 +0.02	163.2 +4.9	7.1 +1.8	98.1 -1.3	close		+
Beyma 18P1200Nd vp459	43.8 -1.2	0.376 =	124.9 -33.4	6.3 +1	98.3 -1.1	close		+
B&C 18HTX100	44 -1	0.323 -0.05	173 +14.7	5.7 +0.4	100.1 +0.7	close	800 W vs 1200 W: lower power handling	+
Beyma 18GT400	40 -5	0.383 +0.01	185 +26.7	5.3 =	98.3 -1.1	close	400 W vs 1200 W: lower power handling	+
Celestion CF1830E	40.5 -4.5	0.342 -0.03	167.9 +9.6	5 -0.3	98.6 -0.8	close	700 W vs 1200 W: lower power handling · Xmax 5 mm < 5.3 mm: lower excursion-limited SPL	+
P.Audio C18-650EL	42 -3	0.311 -0.06	170 +11.7	5.3 =	99.5 +0.1	close		+
Beyma 18P1200Nd vp1	43.8 -1.2	0.376 =	116.9 -41.4	6.1 +0.8	98 -1.4	close		+
B&C 18 PZB 46	37 -8	0.374 =	155 -3.3	6.5 +1.2	96.8 -2.6	close	700 W vs 1200 W: lower power handling	+
Beyma 18P1000Nd	40 -5	0.412 +0.04	178 +19.7	7.6 +2.3	98.2 -1.2	usable		+
P.Audio BM-18LF	39.8 -5.2	0.432 +0.06	169.9 +11.6	5.8 +0.5	97.7 -1.7	usable	500 W vs 1200 W: lower power handling	+

Compare the closest 3 against the C18-650EL v2009 →

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.