Celestion POWER PRO X18

18" · 8 Ω · 1200 W · 96.6 dB · datasheet ↗

Thiele-Small parameters

Nominal size	18"
Impedance	8 Ω
Fs	34.8 Hz
Qts	0.379
Qes	0.431
Qms	3.147
Vas	188.9 L
Sd	1210 cm²
Xmax	8.6 mm
Re	5.1 Ω
Bl	24.2 T·m
Mms	227.3 g
Pe	1200 W
Sensitivity	96.6 dB

Alignment hint

EBP	81 · flexible
Sealed Vb (Qtc ≈ 0.71)	≈ 76.1 L

EBP 50-100: works in either a sealed or ported 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
B&C 18NBX100	35 +0.2	0.38 =	198 +9.1	10 +1.4	96.5 -0.1	close		+
B&C 18 SW 100	35 +0.2	0.375 =	180 -8.9	9.7 +1.1	96.9 +0.3	close		+
B&C 18NBX100	35 +0.2	0.37 -0.01	192 +3.1	10 +1.4	96 -0.6	close	4 Ω vs 8 Ω: amp load changes	+
Beyma 18LEX1600Fe	34 -0.8	0.38 =	188 -0.9	13 +4.4	97 +0.4	close		+
B&C 18SW100	35 +0.2	0.38 =	180 -8.9	12.5 +3.9	97 +0.4	close		+
PD PD 185N01	35.6 +0.8	0.383 =	174.5 -14.4	8.4 -0.2	97.1 +0.5	close	Xmax 8.4 mm < 8.6 mm: lower excursion-limited SPL	+
Precision Devices PD 185N01	35.6 +0.8	0.383 =	174.5 -14.4	8.4 -0.2	97.1 +0.5	close	Xmax 8.4 mm < 8.6 mm: lower excursion-limited SPL	+
Beyma 18LEX1600/ND-8	35 +0.2	0.39 +0.01	205 +16.1	10.4 +1.8	96.8 +0.2	close		+
Sica 18 S 4 PL	36.2 +1.4	0.39 +0.01	189 +0.1	8 -0.6	97.3 +0.7	close	Xmax 8 mm < 8.6 mm: lower excursion-limited SPL	+
Fane 18XLS	36 +1.2	0.407 +0.03	187 -1.9	9.3 +0.7	97 +0.4	close		+

Compare the closest 3 against the POWER PRO X18 →

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.