hertz Hertz Audio ES300.5

12" · 4 Ω · 350 W · 90.8 dB · datasheet ↗

Thiele-Small parameters

Nominal size	12"
Impedance	4 Ω
Fs	35 Hz
Qts	0.66
Qes	0.7
Qms	11.4
Vas	48.5 L
Sd	530.9 cm²
Xmax	6.8 mm
Re	3.1 Ω
Bl	12.8 T·m
Mms	168.5 g
Pe	350 W
Sensitivity	90.8 dB

Alignment hint

EBP	50 · flexible
Sealed Vb (Qtc ≈ 0.71)	≈ 328.1 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
Selenium 12SW3A DVC 2+2	35 =	0.724 +0.06	49 +0.5	6.5 -0.3	89.6 -1.2	close	Xmax 6.5 mm < 6.8 mm: lower excursion-limited SPL	+
Hertz Audio ES 300.5	35 =	0.66 =	48.5 =	9 +2.2	86.6 -4.2	close		+
Kenwood W1024DB	33 -2	0.567 -0.09	51.3 +2.8	6.9 +0.1	91 +0.2	close		+
Peerless SBS-300F38CP01-04	36 +1	0.611 -0.05	55.8 +7.3	5.9 -0.9	90.9 +0.1	close	250 W vs 350 W: lower power handling · Xmax 5.9 mm < 6.8 mm: lower excursion-limited SPL	+
Powerbass S-12T	34.4 -0.6	0.634 -0.03	45.92 -2.58	6.9 +0.1	85.8 -5	close		+
Ground Zero GZIW 300X	34.9 -0.1	0.69 +0.03	53.6 +5.1	7.5 +0.7	86.6 -4.2	close		+
Sony XS-L124P5B	33.1 -1.9	0.626 -0.03	44.5 -4	6 -0.8	88.8 -2	close	Xmax 6 mm < 6.8 mm: lower excursion-limited SPL	+
Pioneer TS-A30S4	39.2 +4.2	0.7 +0.04	56.1 +7.6	6.6 -0.2	92.1 +1.3	close	Xmax 6.6 mm < 6.8 mm: lower excursion-limited SPL	+
Pioneer TS-W310S4	35 =	0.634 -0.03	35.4 -13.1	6.3 -0.5	89.9 -0.9	close	Xmax 6.3 mm < 6.8 mm: lower excursion-limited SPL	+
Scan-Speak 30W/4552-01	34 -1	0.525 -0.13	52.9 +4.4	6.6 -0.2	90.7 -0.1	close	Xmax 6.6 mm < 6.8 mm: lower excursion-limited SPL	+

Compare the closest 3 against the ES300.5 →

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.