Hertz Audio ES 380.5

15" · 4 Ω · 450 W · 87.1 dB · datasheet ↗

Thiele-Small parameters

Nominal size	15"
Impedance	4 Ω
Fs	32 Hz
Qts	0.9
Qes	0.97
Qms	13
Vas	98.8 L
Sd	811 cm²
Xmax	9 mm
Re	3.33 Ω
Bl	12.7 T·m
Mms	234 g
Pe	450 W
Sensitivity	87.1 dB

Alignment hint

EBP	33 · 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
Dayton Audio UMII15-22	29 -3	0.701 -0.2	96 -2.8	9.3 +0.3	88.5 +1.4	usable	8 Ω vs 4 Ω: amp load changes	+
Earthquake Sound DB15	23 -9	0.968 +0.07	95.4 -3.4	11.1 +2.1	86.1 -1	usable		+
Rockville 819216020739	33 +1	0.886 -0.01	70.6 -28.2	12.9 +3.9	92.1 +5	usable		+
Rockville W15K9D4	33 +1	0.886 -0.01	70.6 -28.2	12.9 +3.9	92.1 +5	usable		+
Audiobahn AW150T	30.6 -1.4	0.54 -0.36	95 -3.8	10 +1	88.5 +1.4	usable		+
Focal 40KX	34.6 +2.6	0.82 -0.08	64.8 -34	5.6 -3.4	89.2 +2.1	usable	8 Ω vs 4 Ω: amp load changes · Xmax 5.6 mm < 9 mm: lower excursion-limited SPL	+
American Bass DX 15	30.4 -1.6	0.56 -0.34	89.6 -9.2	15 +6	90 +2.9	usable		+
Skytronic 15" PP	29.2 -2.8	0.929 +0.03	178 +79.2	6 -3	88.6 +1.5	usable	8 Ω vs 4 Ω: amp load changes · 300 W vs 450 W: lower power handling · Xmax 6 mm < 9 mm: lower excursion-limited SPL	+
JBL GT5-15	27.3 -4.7	0.671 -0.23	106.5 +7.7	6.3 -2.7	90 +2.9	usable	300 W vs 450 W: lower power handling · Xmax 6.3 mm < 9 mm: lower excursion-limited SPL	+
Sono Concept Plus E07094D	25 -7	0.796 -0.1	135.3 +36.5	6.1 -2.9	85.9 -1.2	usable	8 Ω vs 4 Ω: amp load changes · 200 W vs 450 W: lower power handling · Xmax 6.1 mm < 9 mm: lower excursion-limited SPL	+

Compare the closest 3 against the ES 380.5 →

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.