AE Speakers TD15S-4ohm

15" · 4 Ω · 250 W · 96.9 dB · datasheet ↗

Thiele-Small parameters

Nominal size	15"
Impedance	4 Ω
Fs	22.8 Hz
Qts	0.371
Qes	0.41
Qms	3.87
Vas	467 L
Sd	855 cm²
Xmax	7 mm
Re	3.5 Ω
Bl	11.4 T·m
Mms	106.9 g
Pe	250 W
Sensitivity	96.9 dB

Alignment hint

EBP	56 · flexible
Sealed Vb (Qtc ≈ 0.71)	≈ 177.4 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
AE Speakers TD15S-4 Ohms	22.8 =	0.371 =	467 =	7 =	96.9 =	close		+
AE Speakers TD15S	22.8 =	0.371 =	467 =	7 =	95.1 -1.8	close	8 Ω vs 4 Ω: amp load changes	+
AE Speakers TD15X 8 Ohms	23.2 +0.4	0.287 -0.08	467 =	7 =	96.3 -0.6	close	8 Ω vs 4 Ω: amp load changes	+
Davis 39GCA15	23.6 +0.8	0.33 -0.04	402 -65	7.5 +0.5	95.6 -1.3	close	8 Ω vs 4 Ω: amp load changes	+
Crites Speakers CW1526 V2017	26.3 +3.5	0.346 -0.03	437.2 -29.8	7.2 +0.2	99.1 +2.2	close	150 W vs 250 W: lower power handling	+
Davis 39GPA15	26.2 +3.4	0.338 -0.03	384 -83	7.5 +0.5	97 +0.1	usable	8 Ω vs 4 Ω: amp load changes	+
JBL 2216ND-1	27.6 +4.8	0.357 -0.01	378.4 -88.6	9.5 +2.5	96.8 -0.1	usable	8 Ω vs 4 Ω: amp load changes	+
JBL GT 152	24 +1.2	0.393 +0.02	319 -148	7.6 +0.6	97.9 +1	usable		+
EMS B15EX-05.0V	22 -0.8	0.374 =	791 +324	7 =	96.1 -0.8	usable	8 Ω vs 4 Ω: amp load changes · 100 W vs 250 W: lower power handling	+
Altec 927-8A	22.9 +0.1	0.278 -0.09	496.1 +29.1	8.3 +1.3	95.1 -1.8	usable	8 Ω vs 4 Ω: amp load changes	+

Compare the closest 3 against the TD15S-4ohm →

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.