18 Sound 12NTLW2500

12" · 4 Ω · 500 W · 97.5 dB · datasheet ↗

Thiele-Small parameters

Nominal size	12"
Impedance	4 Ω
Fs	52 Hz
Qts	0.31
Qes	0.32
Qms	10.2
Vas	52.7 L
Sd	531 cm²
Xmax	7.6 mm
Re	2.8 Ω
Bl	14.4 T·m
Mms	71 g
Pe	500 W
Sensitivity	97.5 dB

Alignment hint

EBP	163 · ported
Sealed Vb (Qtc ≈ 0.71)	≈ 12.5 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
JBL 1400 PRO	52 =	0.314 =	62.3 +9.6	7.6 =	99 +1.5	close	8 Ω vs 4 Ω: amp load changes	+
B&C 12NDL88	51 -1	0.27 -0.04	52 -0.7	8 +0.4	98 +0.5	close	8 Ω vs 4 Ω: amp load changes	+
B&C 12FW88	53 +1	0.33 +0.02	45.7 -7	8 +0.4	97 -0.5	close	8 Ω vs 4 Ω: amp load changes	+
18 Sound 12NTLW3500	53 +1	0.33 +0.02	45 -7.7	8.3 +0.7	97 -0.5	close	8 Ω vs 4 Ω: amp load changes	+
18 Sound 12W750	55 +3	0.33 +0.02	61 +8.3	8 +0.4	98 +0.5	close	16 Ω vs 4 Ω: amp load changes	+
B&C 12FL76	50 -2	0.3 -0.01	57 +4.3	6 -1.6	97.5 =	close	8 Ω vs 4 Ω: amp load changes · Xmax 6 mm < 7.6 mm: lower excursion-limited SPL	+
18 Sound 12NW350	54 +2	0.34 +0.03	46 -6.7	8.3 +0.7	98 +0.5	close	8 Ω vs 4 Ω: amp load changes	+
Beyma 12"MC500	57 +5	0.34 +0.03	57 +4.3	8 +0.4	98 +0.5	close	8 Ω vs 4 Ω: amp load changes	+
18 Sound 12LW1400	45 -7	0.3 -0.01	55 +2.3	8.25 +0.65	96 -1.5	close	8 Ω vs 4 Ω: amp load changes	+
SB Audience NERO-12MWN700D vp JustDiyIt	54.4 +2.4	0.347 +0.04	53.6 +0.9	6.2 -1.4	97.5 =	close	8 Ω vs 4 Ω: amp load changes · Xmax 6.2 mm < 7.6 mm: lower excursion-limited SPL	+

Compare the closest 3 against the 12NTLW2500 →

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.