RCF LF 15X400

15" · 8 Ω · 800 W · 99.1 dB · datasheet ↗

Thiele-Small parameters

Nominal size	15"
Impedance	8 Ω
Fs	37 Hz
Qts	0.247
Qes	0.26
Qms	4.9
Vas	164 L
Sd	898.9 cm²
Xmax	7 mm
Re	5 Ω
Bl	23.9 T·m
Mms	127.8 g
Pe	800 W
Sensitivity	99.1 dB

Alignment hint

EBP	142 · ported
Sealed Vb (Qtc ≈ 0.71)	≈ 22.8 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
RCF LF 15G400	37 =	0.247 =	164 =	6.9 -0.1	99.1 =	close	Xmax 6.9 mm < 7 mm: lower excursion-limited SPL	+
B&C 15PS76-8	38 +1	0.26 +0.01	164 =	7.5 +0.5	99 -0.1	close	550 W vs 800 W: lower power handling	+
RCF L 15P400	36 -1	0.261 +0.01	160 -4	7.2 +0.2	98.6 -0.5	close		+
BMS 15N830V2 v2015	37 =	0.271 +0.02	159 -5	7.5 +0.5	98.6 -0.5	close		+
18 Sound 15NLW9300 v2015	39 +2	0.263 +0.02	170 +6	7.2 +0.2	98.9 -0.2	close		+
B&C 15 PS 76	38 +1	0.266 +0.02	164 =	6.3 -0.7	98.9 -0.2	close	550 W vs 800 W: lower power handling · Xmax 6.3 mm < 7 mm: lower excursion-limited SPL	+
18 Sound 15ND940	39 +2	0.26 +0.01	170 +6	9.5 +2.5	99 -0.1	close	4 Ω vs 8 Ω: amp load changes · 600 W vs 800 W: lower power handling	+
RCF LF 15G401	36 -1	0.259 +0.01	150 -14	6.9 -0.1	98.3 -0.8	close	Xmax 6.9 mm < 7 mm: lower excursion-limited SPL	+
RCF L15P400	36 -1	0.25 =	160 -4	8 +1	96.3 -2.8	close	400 W vs 800 W: lower power handling	+
Oberton 15NB451	39.57 +2.57	0.257 +0.01	145.21 -18.79	7 =	99 -0.1	close	450 W vs 800 W: lower power handling	+

Compare the closest 3 against the LF 15X400 →

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.