18 Sound 12NTLX3500

12" · 8 Ω · 600 W · 95.5 dB · datasheet ↗

Thiele-Small parameters

Nominal size	12"
Impedance	8 Ω
Fs	39 Hz
Qts	0.33
Qes	0.35
Qms	6.2
Vas	79.6 L
Sd	531 cm²
Xmax	7.9 mm
Re	5 Ω
Bl	17.1 T·m
Mms	86 g
Pe	600 W
Sensitivity	95.5 dB

Alignment hint

EBP	111 · ported
Sealed Vb (Qtc ≈ 0.71)	≈ 22.2 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
Sica 12 S 3 PL	42 +3	0.34 +0.01	76.9 -2.7	7 -0.9	95.8 +0.3	close	400 W vs 600 W: lower power handling · Xmax 7 mm < 7.9 mm: lower excursion-limited SPL	+
BMS 12N804	39 =	0.29 -0.04	71 -8.6	8 +0.1	95 -0.5	close		+
Eminence KAPPALITE 3012 LF	37 -2	0.324 -0.01	106.7 +27.1	8.2 +0.3	95.5 =	close	450 W vs 600 W: lower power handling	+
SICA 12 S 3 CP v2018	42 +3	0.34 +0.01	76.9 -2.7	6 -1.9	95.8 +0.3	close	350 W vs 600 W: lower power handling · Xmax 6 mm < 7.9 mm: lower excursion-limited SPL	+
18 Sound 12NTLS3500	41 +2	0.34 +0.01	63 -16.6	7.9 =	94.5 -1	close	4 Ω vs 8 Ω: amp load changes	+
Eminence KappaLITE 3012LF	37 -2	0.32 -0.01	106.65 +27.05	9.1 +1.2	95.5 =	close	450 W vs 600 W: lower power handling	+
Eminence IMPERO 12 A	42.8 +3.8	0.322 -0.01	70.2 -9.4	6.2 -1.7	95.8 +0.3	close	Xmax 6.2 mm < 7.9 mm: lower excursion-limited SPL	+
B&C 12 PS 32	44 +5	0.348 +0.02	82 +2.4	6 -1.9	95.8 +0.3	close	Xmax 6 mm < 7.9 mm: lower excursion-limited SPL	+
Beyma 12"G40	44 +5	0.3 -0.03	81 +1.4	7 -0.9	97 +1.5	close	Xmax 7 mm < 7.9 mm: lower excursion-limited SPL	+
BMS 12N630	28.6 -10.4	0.33 =	85.5 +5.9	8 +0.1	96 +0.5	close		+

Compare the closest 3 against the 12NTLX3500 →

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.