Rockford Fosgate SPP-154

15" · 4 Ω · 100 W · 96.3 dB · datasheet ↗

Thiele-Small parameters

Nominal size	15"
Impedance	4 Ω
Fs	30 Hz
Qts	0.4
Qes	0.52
Qms	1.74
Vas	235 L
Sd	868 cm²
Xmax	3.8 mm
Re	3.6 Ω
Bl	12.8 T·m
Mms	126.5 g
Pe	100 W
Sensitivity	96.3 dB

Alignment hint

EBP	58 · flexible
Sealed Vb (Qtc ≈ 0.71)	≈ 110.6 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
MCM Electronics 55-2953	32 +2	0.408 +0.01	232 -3	3.8 =	94.5 -1.8	close	8 Ω vs 4 Ω: amp load changes	+
SICA 15 S 3 PL 8 Ohms	33 +3	0.38 -0.02	230 -5	8 +4.2	97.1 +0.8	close	8 Ω vs 4 Ω: amp load changes	+
Sica 15 S 3 PL	33 +3	0.38 -0.02	230 -5	8 +4.2	97.2 +0.9	close	8 Ω vs 4 Ω: amp load changes	+
Beyma 15SP	32 +2	0.412 +0.01	309 +74	4.3 +0.5	96.9 +0.6	close	8 Ω vs 4 Ω: amp load changes	+
MCM Electronics 55-2963	32 +2	0.386 -0.01	286 +51	6.5 +2.7	95.8 -0.5	close	8 Ω vs 4 Ω: amp load changes	+
Celestion PULSE15	35.7 +5.7	0.431 +0.03	246.7 +11.7	4.75 +0.95	95.6 -0.7	close	8 Ω vs 4 Ω: amp load changes	+
Celestion PULSE 15	35.7 +5.7	0.431 +0.03	246.7 +11.7	4.8 +1	97.2 +0.9	close	8 Ω vs 4 Ω: amp load changes	+
RCF L 15P06C	35 +5	0.396 =	207 -28	4 +0.2	98.7 +2.4	close		+
Focal 15PR75-200	36 +6	0.382 -0.02	224 -11	5.7 +1.9	97.4 +1.1	close	8 Ω vs 4 Ω: amp load changes	+
GRS 15PT-8	28 -2	0.415 +0.01	242 +7	7.8 +4	93.2 -3.1	close	8 Ω vs 4 Ω: amp load changes	+

Compare the closest 3 against the SPP-154 →

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.