Fluxmag 1504

15" · 8 Ω · 200 W · 97 dB · datasheet ↗

Thiele-Small parameters

Nominal size	15"
Impedance	8 Ω
Fs	25.5 Hz
Qts	0.26
Qes	0.29
Qms	2.53
Vas	530 L
Sd	834 cm²
Xmax	4 mm
Re	7.56 Ω
Bl	17.3 T·m
Mms	71.7 g
Pe	200 W
Sensitivity	97 dB

Alignment hint

EBP	88 · flexible
Sealed Vb (Qtc ≈ 0.71)	≈ 82.9 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
Audio Dynamique AD380PM100	25.5 =	0.26 =	530 =	5 +1	97 =	close		+
Visaton WS40NG	25 -0.5	0.252 -0.01	500 -30	6.5 +2.5	97.1 +0.1	close		+
Supravox 400 EXC Ag 13V	25.3 -0.2	0.253 -0.01	555.6 +25.6	5 +1	98.7 +1.7	close	120 W vs 200 W: lower power handling	+
Monacor SP-380P	23 -2.5	0.27 +0.01	505 -25	4 =	96.4 -0.6	close		+
Supravox 400-2000 Argent vp	24.3 -1.2	0.268 +0.01	605.5 +75.5	5 +1	98.3 +1.3	close	120 W vs 200 W: lower power handling	+
Altec 604-8G	25.8 +0.3	0.252 -0.01	624.4 +94.4	3.8 -0.2	98.7 +1.7	close	100 W vs 200 W: lower power handling · Xmax 3.8 mm < 4 mm: lower excursion-limited SPL	+
Altec 515-8LF	27.4 +1.9	0.255 -0.01	470.1 -59.9	5.1 +1.1	98.4 +1.4	close	125 W vs 200 W: lower power handling	+
Great Plains Audio 515-8LF GPA	27.4 +1.9	0.255 -0.01	470.1 -59.9	5.1 +1.1	98.4 +1.4	close	125 W vs 200 W: lower power handling	+
Altec 604-8H	28.1 +2.6	0.269 +0.01	558.7 +28.7	3.8 -0.2	99.3 +2.3	close	100 W vs 200 W: lower power handling · Xmax 3.8 mm < 4 mm: lower excursion-limited SPL	+
Supravox 400 EXC Ag 14V	25.4 -0.1	0.23 -0.03	554.5 +24.5	5 +1	99.1 +2.1	close	120 W vs 200 W: lower power handling	+

Compare the closest 3 against the 1504 →

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.