Realistic 40-9000 vp

15" · 8 Ω · 200 W · 89.8 dB · datasheet ↗

Thiele-Small parameters

Nominal size	15"
Impedance	8 Ω
Fs	20.5 Hz
Qts	0.767
Qes	1.03
Qms	3
Vas	663 L
Sd	835 cm²
Xmax	6 mm
Re	7.4 Ω
Bl	9.1 T·m
Mms	88.9 g
Pe	200 W
Sensitivity	89.8 dB

Alignment hint

EBP	20 · 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 DIPOLE 15-D16	21.7 +1.2	0.94 +0.17	623 -40	9.1 +3.1	88.1 -1.7	usable	16 Ω vs 8 Ω: amp load changes · 100 W vs 200 W: lower power handling	+
AE Speakers DIPOLE 15-D4	21.7 +1.2	0.938 +0.17	623 -40	9.4 +3.4	94.1 +4.3	usable	4 Ω vs 8 Ω: amp load changes · 100 W vs 200 W: lower power handling	+
Sphynx SP-W15-BP	23.8 +3.3	0.757 -0.01	762.4 +99.4	4 -2	92.5 +2.7	usable	150 W vs 200 W: lower power handling · Xmax 4 mm < 6 mm: lower excursion-limited SPL	+
Visaton TIW400 DS 2x4 Ohms	21 +0.5	0.787 +0.02	422 -241	15.6 +9.6	91.9 +2.1	usable	4 Ω vs 8 Ω: amp load changes	+
AE Speakers IB15HT 4 Ohms	16 -4.5	0.7 -0.07	440 -223	9 +3	90.3 +0.5	usable	4 Ω vs 8 Ω: amp load changes	+
AE Speakers IB15AU-8	20.4 -0.1	0.619 -0.15	387 -276	9 +3	90.4 +0.6	usable		+
Jamo 20388	27 +6.5	0.848 +0.08	495.6 -167.4	6 =	93.3 +3.5	usable	100 W vs 200 W: lower power handling	+
Jamo 20388 - 15	27 +6.5	0.848 +0.08	495 -168	6 =	93.3 +3.5	usable	100 W vs 200 W: lower power handling	+
AE Speakers IB15HT-8	16 -4.5	0.7 -0.07	440 -223	9 +3	87.2 -2.6	usable		+
AE Speakers IB15HT 8 Ohms	16 -4.5	0.7 -0.07	440 -223	9 +3	87.2 -2.6	usable		+

Compare the closest 3 against the 40-9000 vp →

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.