Fluxmag 1504-CX

15" · 8 Ω · 200 W · 101.1 dB · datasheet ↗

Thiele-Small parameters

Nominal size	15"
Impedance	8 Ω
Fs	25.2 Hz
Qts	0.158
Qes	0.163
Qms	5.69
Vas	659.1 L
Sd	881 cm²
Xmax	4 mm
Re	6.37 Ω
Bl	20.2 T·m
Mms	66.1 g
Pe	200 W
Sensitivity	101.1 dB

Alignment hint

EBP	155 · ported
Sealed Vb (Qtc ≈ 0.71)	≈ 34.6 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
Altec 515B	24.7 -0.5	0.166 +0.01	557.8 -101.3	4.2 +0.2	97.2 -3.9	close	16 Ω vs 8 Ω: amp load changes · 75 W vs 200 W: lower power handling	+
Altec 515C	24.7 -0.5	0.166 +0.01	557.8 -101.3	4.2 +0.2	97.2 -3.9	close	16 Ω vs 8 Ω: amp load changes · 75 W vs 200 W: lower power handling	+
Gauss 3540 GAUSS	25 -0.2	0.16 =	438.9 -220.2	5.1 +1.1	101.8 +0.7	usable	4 Ω vs 8 Ω: amp load changes	+
EMS B15EX-12.5V	22 -3.2	0.146 -0.01	791 +131.9	5.4 +1.4	100.4 -0.7	usable	100 W vs 200 W: lower power handling	+
Gauss 3580 GAUSS	25 -0.2	0.16 =	438.9 -220.2	5.1 +1.1	99.2 -1.9	usable		+
Fertin Acoustics 38EX-2	25 -0.2	0.135 -0.02	595 -64.1	3 -1	102.2 +1.1	usable	80 W vs 200 W: lower power handling · Xmax 3 mm < 4 mm: lower excursion-limited SPL	+
Electro-Voice DL 15W	21 -4.2	0.164 +0.01	575 -84.1	5.6 +1.6	98.2 -2.9	usable		+
Altec 515E	22.9 -2.3	0.185 +0.03	665.5 +6.4	4.6 +0.6	96.5 -4.6	usable	16 Ω vs 8 Ω: amp load changes · 75 W vs 200 W: lower power handling	+
Altec 515-8LFE	25.7 +0.5	0.203 +0.05	547.7 -111.4	4.3 +0.3	99.9 -1.2	usable	125 W vs 200 W: lower power handling	+
Audax PR38SM250	19.5 -5.7	0.177 +0.02	660 +0.9	4 =	97.7 -3.4	usable		+

Compare the closest 3 against the 1504-CX →

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.