Sony XS-L124P5B

12" · 4 Ω · 380 W · 88.8 dB · datasheet ↗

Thiele-Small parameters

Nominal size	12"
Impedance	4 Ω
Fs	33.1 Hz
Qts	0.626
Qes	0.68
Qms	7.82
Vas	44.5 L
Sd	490.9 cm²
Xmax	6 mm
Re	3.95 Ω
Bl	14.6 T·m
Mms	175.5 g
Pe	380 W
Sensitivity	88.8 dB

Alignment hint

EBP	49 · sealed
Sealed Vb (Qtc ≈ 0.71)	≈ 161.3 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
Powerbass S-12T	34.4 +1.3	0.634 +0.01	45.92 +1.42	6.9 +0.9	85.8 -3	close	300 W vs 380 W: lower power handling	+
Pioneer TS-W308D4	34.5 +1.4	0.625 =	34.7 -9.8	6.4 +0.4	89.4 +0.6	close		+
MTX Audio RTS12-04	33.5 +0.4	0.631 +0.01	58.4 +13.9	5.8 -0.2	89.5 +0.7	close	250 W vs 380 W: lower power handling · Xmax 5.8 mm < 6 mm: lower excursion-limited SPL	+
Focal R-300S	32.6 -0.5	0.582 -0.04	53.9 +9.4	6 =	89.6 +0.8	close	300 W vs 380 W: lower power handling	+
hertz Hertz Audio ES300.5	35 +1.9	0.66 +0.03	48.5 +4	6.8 +0.8	90.8 +2	close		+
Pioneer TS-W310S4	35 +1.9	0.634 +0.01	35.4 -9.1	6.3 +0.3	89.9 +1.1	close		+
Hertz Audio ES 300.5	35 +1.9	0.66 +0.03	48.5 +4	9 +3	86.6 -2.2	close		+
Selenium 12SW3A DVC 2+2	35 +1.9	0.724 +0.1	49 +4.5	6.5 +0.5	89.6 +0.8	close		+
Kenwood W1024DB	33 -0.1	0.567 -0.06	51.3 +6.8	6.9 +0.9	91 +2.2	close	300 W vs 380 W: lower power handling	+
Peerless SBS-300F38CP01-04	36 +2.9	0.611 -0.02	55.8 +11.3	5.9 -0.1	90.9 +2.1	close	250 W vs 380 W: lower power handling · Xmax 5.9 mm < 6 mm: lower excursion-limited SPL	+

Compare the closest 3 against the XS-L124P5B →

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)

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