Fountek FW300

12" · 4 Ω · 300 W · 89.8 dB · datasheet ↗

Thiele-Small parameters

Nominal size	12"
Impedance	4 Ω
Fs	37.3 Hz
Qts	0.783
Qes	0.946
Qms	4.557
Vas	50.1 L
Sd	530.9 cm²
Xmax	5.5 mm
Re	3.6 Ω
Bl	11.3 T·m
Mms	143.9 g
Pe	300 W
Sensitivity	89.8 dB

Alignment hint

EBP	39 · sealed
Sealed Vb (Qtc ≈ 0.71)	Qts too high

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
Selenium 12SW3A DVC 2+2	35 -2.3	0.724 -0.06	49 -1.1	6.5 +1	89.6 -0.2	close		+
Selenium 12SW13ADVC 4+4	37 -0.3	0.854 +0.07	47 -3.1	7 +1.5	86.2 -3.6	close	8 Ω vs 4 Ω: amp load changes	+
hertz Hertz Audio ES300.5	35 -2.3	0.66 -0.12	48.5 -1.6	6.8 +1.3	90.8 +1	close		+
Pioneer TS-W310D4	37 -0.3	0.778 -0.01	37.4 -12.7	6.2 +0.7	87 -2.8	close	8 Ω vs 4 Ω: amp load changes	+
MTX Audio T8500	35.5 -1.8	0.734 -0.05	41.5 -8.6	5.4 -0.1	92.2 +2.4	close	2 Ω vs 4 Ω: amp load changes · Xmax 5.4 mm < 5.5 mm: lower excursion-limited SPL	+
Pioneer TS-A30S4	39.2 +1.9	0.7 -0.08	56.1 +6	6.6 +1.1	92.1 +2.3	close		+
Pioneer TS-W311S4	42 +4.7	0.795 +0.01	37.5 -12.6	5.8 +0.3	91.4 +1.6	usable		+
Ground Zero GZIW 300X	34.9 -2.4	0.69 -0.09	53.6 +3.5	7.5 +2	86.6 -3.2	usable		+
Peerless SBS-300F38CP01-04	36 -1.3	0.611 -0.17	55.8 +5.7	5.9 +0.4	90.9 +1.1	usable		+
Infinity Kappa 123WDSSI 2Ohm	34.2 -3.1	0.778 -0.01	58.6153 +8.52	10.2 +4.7	86.0429 -3.76	usable	2 Ω vs 4 Ω: amp load changes	+

Compare the closest 3 against the FW300 →

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.