AE Speakers IB15HT 4 Ohms

15" · 4 Ω · 300 W · 90.3 dB · datasheet ↗

Thiele-Small parameters

Nominal size	15"
Impedance	4 Ω
Fs	16 Hz
Qts	0.7
Qes	0.78
Qms	6.8
Vas	440 L
Sd	830 cm²
Xmax	9 mm
Re	2.7 Ω
Bl	8.7 T·m
Mms	217.2 g
Pe	300 W
Sensitivity	90.3 dB

Alignment hint

EBP	21 · sealed
Sealed Vb (Qtc ≈ 0.71)	≈ 21560 L

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
AE Speakers IB15HT-8	16 =	0.7 =	440 =	9 =	87.2 -3.1	close	8 Ω vs 4 Ω: amp load changes	+
AE Speakers IB15HT 8 Ohms	16 =	0.7 =	440 =	9 =	87.2 -3.1	close	8 Ω vs 4 Ω: amp load changes	+
AE Speakers IB15	16 =	0.7 =	439 -1	9.3 +0.3	87.2 -3.1	close	8 Ω vs 4 Ω: amp load changes	+
AE Speakers IB15-8	16 =	0.7 =	439 -1	9.3 +0.3	87.2 -3.1	close	8 Ω vs 4 Ω: amp load changes	+
AE Speakers IB15AU-8	20.4 +4.4	0.619 -0.08	387 -53	9 =	90.4 +0.1	usable	8 Ω vs 4 Ω: amp load changes	+
Rythmik Audio DS1510	15.4 -0.6	0.472 -0.23	430 -10	10 +1	90.9 +0.6	usable		+
Visaton TIW400 DS 2x4 Ohms	21 +5	0.787 +0.09	422 -18	15.6 +6.6	91.9 +1.6	usable		+
AE Speakers IB15AU-4	20.4 +4.4	0.619 -0.08	387 -53	9 =	93.5 +3.2	usable		+
Realistic 40-9000 vp	20.5 +4.5	0.767 +0.07	663 +223	6 -3	89.8 -0.5	usable	8 Ω vs 4 Ω: amp load changes · 200 W vs 300 W: lower power handling · Xmax 6 mm < 9 mm: lower excursion-limited SPL	+
Dayton Audio IB385-8	21.5 +5.5	0.588 -0.11	248.9 -191.1	12.4 +3.4	89.8 -0.5	usable	8 Ω vs 4 Ω: amp load changes	+

Compare the closest 3 against the IB15HT 4 Ohms →

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.