Fluxmag 1504-DF

15" · 8 Ω · 200 W · 98.9 dB · datasheet ↗

Thiele-Small parameters

Nominal size	15"
Impedance	8 Ω
Fs	21.6 Hz
Qts	0.132
Qes	0.14
Qms	2.19
Vas	393.2 L
Sd	875.3 cm²
Xmax	4 mm
Re	4.6 Ω
Bl	25.7 T·m
Mms	149 g
Pe	200 W
Sensitivity	98.9 dB

Alignment hint

EBP	154 · ported
Sealed Vb (Qtc ≈ 0.71)	≈ 14.2 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
Audax PR380M2	23.8 +2.2	0.151 +0.02	376 -17.2	5.5 +1.5	98.1 -0.8	close		+
Audax PR38S100	24 +2.4	0.171 +0.04	423 +29.8	4 =	98.7 -0.2	usable		+
Gauss 3580 GAUSS	25 +3.4	0.16 +0.03	438.9 +45.7	5.1 +1.1	99.2 +0.3	usable		+
Tannoy K3838	22 +0.4	0.176 +0.04	481.4 +88.2	4 =	97.9 -1	usable	120 W vs 200 W: lower power handling	+
GOTO SG38WNS	28.1 +6.5	0.154 +0.02	348.6 -44.6	4 =	97.4 -1.5	usable	16 Ω vs 8 Ω: amp load changes	+
Gauss 3540 GAUSS	25 +3.4	0.16 +0.03	438.9 +45.7	5.1 +1.1	101.8 +2.9	usable	4 Ω vs 8 Ω: amp load changes	+
Tannoy DU 386	22 +0.4	0.185 +0.05	483 +89.8	4 =	97.6 -1.3	usable	85 W vs 200 W: lower power handling	+
Tannoy HPD 385A	22 +0.4	0.185 +0.05	483 +89.8	4 =	97.6 -1.3	usable	85 W vs 200 W: lower power handling	+
Tannoy K3828	22 +0.4	0.185 +0.05	483 +89.8	4 =	97.6 -1.3	usable	85 W vs 200 W: lower power handling	+
Fluxmag 1504-BM	22.7 +1.1	0.183 +0.05	469.9 +76.7	5 +1	98 -0.9	usable		+

Compare the closest 3 against the 1504-DF →

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.