Fostex L 470

15" · 8 Ω · 150 W · 98 dB · datasheet ↗

Thiele-Small parameters

Nominal size	15"
Impedance	8 Ω
Fs	25 Hz
Qts	0.203
Qes	0.21
Qms	5.9
Vas	457 L
Sd	890 cm²
Xmax	4.2 mm
Re	6.8 Ω
Bl	22.4 T·m
Mms	98.5 g
Pe	150 W
Sensitivity	98 dB

Alignment hint

EBP	119 · ported
Sealed Vb (Qtc ≈ 0.71)	≈ 41 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
Supravox 400-2000EXC_15V	25 =	0.196 -0.01	429 -28	4.9 +0.7	98.1 +0.1	close		+
Supravox 400-2000EXC_14V	25 =	0.214 +0.01	439 -18	5 +0.8	97.8 -0.2	close		+
Supravox 400 GN-A	23 -2	0.196 -0.01	448 -9	5 +0.8	97.2 -0.8	close		+
Altec 604-2	27.1 +2.1	0.213 +0.01	446 -11	3.8 -0.4	98.6 +0.6	close	100 W vs 150 W: lower power handling · Xmax 3.8 mm < 4.2 mm: lower excursion-limited SPL	+
Altec 604-E	27.1 +2.1	0.213 +0.01	446 -11	3.8 -0.4	98.6 +0.6	close	100 W vs 150 W: lower power handling · Xmax 3.8 mm < 4.2 mm: lower excursion-limited SPL	+
Great Plains Audio 604-D	27.1 +2.1	0.213 +0.01	446 -11	3.8 -0.4	98.6 +0.6	close	100 W vs 150 W: lower power handling · Xmax 3.8 mm < 4.2 mm: lower excursion-limited SPL	+
Beyma 15B42	24.2 -0.8	0.185 -0.02	480.9 +23.9	4 -0.2	98.8 +0.8	close	Xmax 4 mm < 4.2 mm: lower excursion-limited SPL	+
Altec 515-8LFE	25.7 +0.7	0.203 =	547.7 +90.7	4.3 +0.1	99.9 +1.9	close		+
Supravox 400-2000EXC_13V	25 =	0.236 +0.03	438 -19	5 +0.8	97.4 -0.6	close		+
Fluxmag 1504-BM	22.7 -2.3	0.183 -0.02	469.9 +12.9	5 +0.8	98 =	close		+

Compare the closest 3 against the L 470 →

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.