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18 Sound 15NTLW3500

15" · 4 Ω · 900 W · 98 dB · datasheet ↗

Thiele-Small parameters

Nominal size15"
Impedance4 Ω
Fs46 Hz
Qts0.4
Qes0.41
Qms9.4
Vas115 L
Sd881 cm²
Xmax8.3 mm
Re3.1 Ω
Bl15.8 T·m
Mms115 g
Pe900 W
Sensitivity98 dB

Alignment hint

EBP112 · ported
Sealed Vb (Qtc ≈ 0.71)≈ 54.1 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

DriverFs (Hz)QtsVas (L)Xmax (mm)Sens (dB)FitNotesCompare
18 Sound 15NTLW350045 -10.39 -0.01131 +168.3 =98 =close8 Ω vs 4 Ω: amp load changes+
Precision Devices PD15650.15 +4.150.38 -0.02120.17 +5.179.5 +1.297 -1close16 Ω vs 4 Ω: amp load changes · 650 W vs 900 W: lower power handling+
B&C 15FW8849 +30.43 +0.03103.7 -11.38 -0.398 =close8 Ω vs 4 Ω: amp load changes · 700 W vs 900 W: lower power handling · Xmax 8 mm < 8.3 mm: lower excursion-limited SPL+
Beyma 15MC50046 =0.45 +0.05134 +198 -0.398 =close8 Ω vs 4 Ω: amp load changes · 500 W vs 900 W: lower power handling · Xmax 8 mm < 8.3 mm: lower excursion-limited SPL+
Beyma 15"LX60V242 -40.44 +0.04105.53 -9.478 -0.398 =close8 Ω vs 4 Ω: amp load changes · 700 W vs 900 W: lower power handling · Xmax 8 mm < 8.3 mm: lower excursion-limited SPL+
Beyma 15LEX1000Nd41 -50.37 -0.03113 -210 +1.797 -1close8 Ω vs 4 Ω: amp load changes+
Ciare FXE 15-440.6 -5.40.406 +0.01131 +168.4 +0.196.5 -1.5close8 Ω vs 4 Ω: amp load changes+
Eminence KAPPA PRO 15 LF v146 =0.372 -0.03127.5 +12.56.4 -1.998.6 +0.6close8 Ω vs 4 Ω: amp load changes · 600 W vs 900 W: lower power handling · Xmax 6.4 mm < 8.3 mm: lower excursion-limited SPL+
B&C 15NDL8845 -10.34 -0.06126 +118 -0.399 +1close8 Ω vs 4 Ω: amp load changes · 700 W vs 900 W: lower power handling · Xmax 8 mm < 8.3 mm: lower excursion-limited SPL+
Beyma 15MCS50046 =0.48 +0.08134 +198 -0.398 =close8 Ω vs 4 Ω: amp load changes · 500 W vs 900 W: lower power handling · Xmax 8 mm < 8.3 mm: lower excursion-limited SPL+

Compare the closest 3 against the 15NTLW3500 →

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.

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