AE Speakers DIPOLE 18-D8

18" · 4 Ω · 150 W · 96.5 dB · datasheet ↗

Thiele-Small parameters

Nominal size	18"
Impedance	4 Ω
Fs	22.9 Hz
Qts	0.809
Qes	0.89
Qms	8.85
Vas	885 L
Sd	1218 cm²
Xmax	9.6 mm
Re	3.4 Ω
Bl	7.9 T·m
Mms	113.5 g
Pe	150 W
Sensitivity	96.5 dB

Alignment hint

EBP	26 · 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
AE Speakers IB18HT-4ohm	18.4 -4.5	0.567 -0.24	632.1 -252.9	16.7 +7.1	94.5 -2	usable		+
FI Audio IB318-SINGLE2	22.3 -0.6	0.652 -0.16	381 -504	12.3 +2.7	93.4 -3.1	risky		+
Fostex FW 505	20 -2.9	0.404 -0.4	860 -25	8.5 -1.1	94.3 -2.2	risky	8 Ω vs 4 Ω: amp load changes · Xmax 8.5 mm < 9.6 mm: lower excursion-limited SPL	+
AE Speakers IB18HT-8	18.4 -4.5	0.568 -0.24	632.1 -252.9	16.7 +7.1	91.5 -5	risky	8 Ω vs 4 Ω: amp load changes	+
GRS 18PT-8	23 +0.1	0.547 -0.26	467 -418	7.8 -1.8	92.5 -4	risky	8 Ω vs 4 Ω: amp load changes · Xmax 7.8 mm < 9.6 mm: lower excursion-limited SPL	+
Altec 3182	18 -4.9	0.398 -0.41	991.1 +106.1	10.7 +1.1	93.5 -3	risky	8 Ω vs 4 Ω: amp load changes	+
Faital PRO 18FH500	30 +7.1	0.53 -0.28	450.1 -434.9	9.45 -0.15	97 +0.5	risky	16 Ω vs 4 Ω: amp load changes · Xmax 9.45 mm < 9.6 mm: lower excursion-limited SPL	+
Altec 3182 vp	20.3 -2.6	0.343 -0.47	1159.7 +274.7	10.2 +0.6	96.5 =	risky	8 Ω vs 4 Ω: amp load changes	+
Mach 5 Audio MAC MAH CWA46	27 +4.1	0.448 -0.36	470.3 -414.7	10 +0.4	96.2 -0.3	risky	8 Ω vs 4 Ω: amp load changes	+
Zeuz DC181125ip	22.2 -0.7	0.458 -0.35	429.3 -455.7	8.5 -1.1	95 -1.5	risky	Xmax 8.5 mm < 9.6 mm: lower excursion-limited SPL	+

Compare the closest 3 against the DIPOLE 18-D8 →

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.