Skytronic 902.439

15" · 8 Ω · 300 W · 92.5 dB · datasheet ↗

Thiele-Small parameters

Nominal size	15"
Impedance	8 Ω
Fs	30 Hz
Qts	0.601
Qes	0.63
Qms	13
Vas	230 L
Sd	844 cm²
Xmax	4 mm
Re	7 Ω
Bl	16 T·m
Mms	122.2 g
Pe	300 W
Sensitivity	92.5 dB

Alignment hint

EBP	48 · sealed
Sealed Vb (Qtc ≈ 0.71)	≈ 598.5 L

EBP < 50: favours a sealed (closed) 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
Sphynx SP-W15-PRO	32 +2	0.616 +0.02	273 +43	4 =	92.8 +0.3	close	16 Ω vs 8 Ω: amp load changes · 150 W vs 300 W: lower power handling	+
Stromberg-Carlson RF 484 vp2	31 +1	0.598 =	294.9 +64.9	4 =	92.7 +0.2	close	150 W vs 300 W: lower power handling	+
Davis 39RCA15	33.7 +3.7	0.612 +0.01	258 +28	4 =	95.3 +2.8	close	200 W vs 300 W: lower power handling	+
SB Audience BIANCO-15OB350 V2	34 +4	0.572 -0.03	212.7 -17.3	8.4 +4.4	93.9 +1.4	usable		+
Rockville RVW1500P8	28.3 -1.7	0.503 -0.1	254 +24	7.5 +3.5	92.7 +0.2	usable		+
PRV Audio 15W 700	31.7 +1.7	0.625 +0.02	308.1 +78.1	6.9 +2.9	94.7 +2.2	usable		+
SB Audience BIANCO-15OB350 v2022	32 +2	0.493 -0.11	239.4 +9.4	9.2 +5.2	94.2 +1.7	usable		+
Beyma CM15/T	34 +4	0.615 +0.01	293 +63	3.5 -0.5	95.4 +2.9	usable	200 W vs 300 W: lower power handling · Xmax 3.5 mm < 4 mm: lower excursion-limited SPL	+
Celestion BN15-400X v2018	35.1 +5.1	0.527 -0.07	253 +23	4 =	96.5 +4	usable		+
Fane 15-400LF	39 +9	0.577 -0.02	210 -20	5 +1	96.1 +3.6	usable		+

Compare the closest 3 against the 902.439 →

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.