RCF L 18P300 4 Ohms

18" · 4 Ω · 1000 W · 99.9 dB · datasheet ↗

Thiele-Small parameters

Nominal size	18"
Impedance	4 Ω
Fs	34 Hz
Qts	0.305
Qes	0.32
Qms	6.7
Vas	213 L
Sd	1130 cm²
Xmax	7.8 mm
Re	3.4 Ω
Bl	20.4 T·m
Mms	184.1 g
Pe	1000 W
Sensitivity	99.9 dB

Alignment hint

EBP	106 · ported
Sealed Vb (Qtc ≈ 0.71)	≈ 48.7 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
B&C 18 TBX 46 v2	34 =	0.311 +0.01	227 +14	8.1 +0.3	98.2 -1.7	close	8 Ω vs 4 Ω: amp load changes	+
18 Sound 18LW2420	34 =	0.31 +0.01	208 -5	10 +2.2	98 -1.9	close		+
PD PD 185N002	36 +2	0.297 -0.01	226 +13	7.8 =	98.7 -1.2	close	8 Ω vs 4 Ω: amp load changes	+
Precision Devices PD 185N002	36 +2	0.297 -0.01	226 +13	7.8 =	98.7 -1.2	close	8 Ω vs 4 Ω: amp load changes	+
Faital PRO 18HP1022	35 +1	0.3 -0.01	204.9 -8.1	9.5 +1.7	98 -1.9	close	8 Ω vs 4 Ω: amp load changes	+
Monacor SP-18/1000HP	35 +1	0.282 -0.02	219 +6	7.9 +0.1	98.8 -1.1	close	8 Ω vs 4 Ω: amp load changes	+
Fane 18-800N	38 +4	0.306 =	217 +4	7.1 -0.7	99.5 -0.4	close	8 Ω vs 4 Ω: amp load changes · Xmax 7.1 mm < 7.8 mm: lower excursion-limited SPL	+
Faital PRO 18HP1010	35 +1	0.31 +0.01	225.9 +12.9	9.75 +1.95	98 -1.9	close		+
Faital PRO W18N8-1000	35 +1	0.273 -0.03	211.8 -1.2	7.8 =	98.8 -1.1	close	8 Ω vs 4 Ω: amp load changes	+
18 Sound 18LW2400	35 +1	0.31 +0.01	230 +17	9.5 +1.7	98 -1.9	close	8 Ω vs 4 Ω: amp load changes	+

Compare the closest 3 against the L 18P300 4 Ohms →

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.