Fostex FW 405 N

15" · 8 Ω · 150 W · 94.7 dB · datasheet ↗

Thiele-Small parameters

Nominal size	15"
Impedance	8 Ω
Fs	27 Hz
Qts	0.446
Qes	0.478
Qms	6.76
Vas	392.5 L
Sd	890 cm²
Xmax	7.6 mm
Re	6.89 Ω
Bl	15.5 T·m
Mms	98.3 g
Pe	150 W
Sensitivity	94.7 dB

Alignment hint

EBP	56 · flexible
Sealed Vb (Qtc ≈ 0.71)	≈ 259.3 L

EBP 50-100: works in either a sealed or ported 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
Supravox 380-2000 OB	27.5 +0.5	0.451 +0.01	360 -32.5	6.3 -1.3	95.2 +0.5	close	Xmax 6.3 mm < 7.6 mm: lower excursion-limited SPL	+
JBL 2216ND-1	27.6 +0.6	0.357 -0.09	378.4 -14.1	9.5 +1.9	96.8 +2.1	usable		+
AE Speakers SBP15-4	21.3 -5.7	0.432 -0.01	364 -28.5	14 +6.4	95.4 +0.7	usable	4 Ω vs 8 Ω: amp load changes	+
Supravox 400-2000EXC_09V	25 -2	0.431 -0.02	440 +47.5	5 -2.6	94.8 +0.1	usable	Xmax 5 mm < 7.6 mm: lower excursion-limited SPL	+
Eminence LEGEND BP1525	32 +5	0.479 +0.03	397 +4.5	6.2 -1.4	96.9 +2.2	usable	Xmax 6.2 mm < 7.6 mm: lower excursion-limited SPL	+
JBL 2216ND (pour JBL 4367)	28.3 +1.3	0.376 -0.07	333 -59.5	9.5 +1.9	96.3 +1.6	usable		+
Davis 39GPA15	26.2 -0.8	0.338 -0.11	384 -8.5	7.5 -0.1	97 +2.3	usable	Xmax 7.5 mm < 7.6 mm: lower excursion-limited SPL	+
JBL GT3-15	28.2 +1.2	0.439 -0.01	266.2 -126.3	9 +1.4	97.1 +2.4	usable	4 Ω vs 8 Ω: amp load changes	+
ATC PA100-375 STD	26 -1	0.377 -0.07	358 -34.5	5.6 -2	95.1 +0.4	usable	100 W vs 150 W: lower power handling · Xmax 5.6 mm < 7.6 mm: lower excursion-limited SPL	+
Oxygen AIR 15.1	25 -2	0.465 +0.02	262.1 -130.4	11.1 +3.5	94.5 -0.2	usable	4 Ω vs 8 Ω: amp load changes	+

Compare the closest 3 against the FW 405 N →

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.