Pioneer TS-W307D4

12" · 4 Ω · 400 W · 91.3 dB · datasheet ↗

Thiele-Small parameters

Nominal size	12"
Impedance	4 Ω
Fs	34.8 Hz
Qts	0.52
Qes	0.54
Qms	13.99
Vas	40.9 L
Sd	460 cm²
Xmax	7.4 mm
Re	3 Ω
Bl	13.6 T·m
Mms	151.8 g
Pe	400 W
Sensitivity	91.3 dB

Alignment hint

EBP	64 · flexible
Sealed Vb (Qtc ≈ 0.71)	≈ 48.2 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
Dayton Audio TITANIC	36.3 +1.5	0.506 -0.01	44 +3.1	7.4 =	92 +0.7	close		+
Massive Audio REBEL 124	32.6 -2.2	0.485 -0.04	38 -2.9	7.1 -0.3	92.4 +1.1	close	2 Ω vs 4 Ω: amp load changes · Xmax 7.1 mm < 7.4 mm: lower excursion-limited SPL	+
JBL W12GTI	31.8 -3	0.508 -0.01	44.8 +3.9	9.9 +2.5	90.1 -1.2	close		+
JBL W12GTi MKII	31.8 -3	0.508 -0.01	44.8 +3.9	9.9 +2.5	90.1 -1.2	close		+
JBL W12GTIe	31.8 -3	0.508 -0.01	44.8 +3.9	9.9 +2.5	90.1 -1.2	close		+
Polk Audio MM1240	35 +0.2	0.53 +0.01	38 -2.9	25 +17.6	92 +0.7	close		+
Scan-Speak 30W/4552-01	34 -0.8	0.525 +0.01	52.9 +12	6.6 -0.8	90.7 -0.6	close	Xmax 6.6 mm < 7.4 mm: lower excursion-limited SPL	+
Monacor RAPTOR 12 MK2	34 -0.8	0.523 =	32 -8.9	10.1 +2.7	89.2 -2.1	close		+
Kenwood W1024DB	33 -1.8	0.567 +0.05	51.3 +10.4	6.9 -0.5	91 -0.3	close	300 W vs 400 W: lower power handling · Xmax 6.9 mm < 7.4 mm: lower excursion-limited SPL	+
DC Audio LV4 D2	35.9 +1.1	0.5 -0.02	30.6 -10.3	11 +3.6	92.2 +0.9	close		+

Compare the closest 3 against the TS-W307D4 →

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.