Pioneer TS-W308D4

12" · 4 Ω · 400 W · 89.4 dB · datasheet ↗

Thiele-Small parameters

Nominal size	12"
Impedance	4 Ω
Fs	34.5 Hz
Qts	0.625
Qes	0.65
Qms	16.43
Vas	34.7 L
Sd	517 cm²
Xmax	6.4 mm
Re	3.2 Ω
Bl	15.7 T·m
Mms	229.9 g
Pe	400 W
Sensitivity	89.4 dB

Alignment hint

EBP	53 · flexible
Sealed Vb (Qtc ≈ 0.71)	≈ 123.9 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
Pioneer TS-W310S4	35 +0.5	0.634 +0.01	35.4 +0.7	6.3 -0.1	89.9 +0.5	close	Xmax 6.3 mm < 6.4 mm: lower excursion-limited SPL	+
Pioneer TS-W3003D4	35 +0.5	0.588 -0.04	34.6 -0.1	6.2 -0.2	91.8 +2.4	close	Xmax 6.2 mm < 6.4 mm: lower excursion-limited SPL	+
Pioneer TS-SW3002S4	35 +0.5	0.61 -0.02	35.4 +0.7	8.8 +2.4	93 +3.6	close		+
Sony XS-L124P5B	33.1 -1.4	0.626 =	44.5 +9.8	6 -0.4	88.8 -0.6	close	Xmax 6 mm < 6.4 mm: lower excursion-limited SPL	+
Monacor RAPTOR 12 MK2	34 -0.5	0.523 -0.1	32 -2.7	10.1 +3.7	89.2 -0.2	close		+
hertz Hertz Audio ES300.5	35 +0.5	0.66 +0.04	48.5 +13.8	6.8 +0.4	90.8 +1.4	usable		+
Powerbass S-12T	34.4 -0.1	0.634 +0.01	45.92 +11.22	6.9 +0.5	85.8 -3.6	usable	300 W vs 400 W: lower power handling	+
American Bass DX 12	35.6 +1.1	0.6 -0.03	41.5 +6.8	12 +5.6	86.2 -3.2	usable		+
Pioneer TS-W307D4	34.8 +0.3	0.52 -0.1	40.9 +6.2	7.4 +1	91.3 +1.9	usable		+
Selenium 12SW3A DVC 2+2	35 +0.5	0.724 +0.1	49 +14.3	6.5 +0.1	89.6 +0.2	usable		+

Compare the closest 3 against the TS-W308D4 →

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.