Ciare NDC 15-4 S

15" · 8 Ω · 1000 W · 95.5 dB · datasheet ↗

Thiele-Small parameters

Nominal size	15"
Impedance	8 Ω
Fs	31.2 Hz
Qts	0.253
Qes	0.28
Qms	2.59
Vas	156.2 L
Sd	830 cm²
Xmax	8.8 mm
Re	5.96 Ω
Bl	25.9 T·m
Mms	160.8 g
Pe	1000 W
Sensitivity	95.5 dB

Alignment hint

EBP	111 · ported
Sealed Vb (Qtc ≈ 0.71)	≈ 22.9 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
RCF L15P400	36 +4.8	0.25 =	160 +3.8	8 -0.8	96.3 +0.8	close	400 W vs 1000 W: lower power handling · Xmax 8 mm < 8.8 mm: lower excursion-limited SPL	+
RCF LF15G401	36 +4.8	0.26 +0.01	150 -6.2	9 +0.2	97 +1.5	close		+
RCF LF15Y408	36 +4.8	0.26 +0.01	150 -6.2	9 +0.2	97 +1.5	close		+
18 Sound 15NLW9500	34 +2.8	0.29 +0.04	147.5 -8.7	9 +0.2	96 +0.5	close	4 Ω vs 8 Ω: amp load changes	+
BMS 15N830vv2	37 +5.8	0.27 +0.02	159 +2.8	8 -0.8	96 +0.5	close	Xmax 8 mm < 8.8 mm: lower excursion-limited SPL	+
RCF LF15N401	34 +2.8	0.22 -0.03	160 +3.8	9 +0.2	97 +1.5	close		+
PHL Audio 6090	35 +3.8	0.265 +0.01	145 -11.2	7.9 -0.9	97 +1.5	close	Xmax 7.9 mm < 8.8 mm: lower excursion-limited SPL	+
RCF LF 15X401	34 +2.8	0.289 +0.04	146 -10.2	10.3 +1.5	96.4 +0.9	close		+
Beyma 15P1000	35 +3.8	0.293 +0.04	146 -10.2	8.7 -0.1	96.3 +0.8	close	Xmax 8.7 mm < 8.8 mm: lower excursion-limited SPL	+
B&C 15NW100	33 +1.8	0.22 -0.03	139 -17.2	9 +0.2	97 +1.5	close		+

Compare the closest 3 against the NDC 15-4 S →

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.