MTX Audio T815-22

15" · 4 Ω · 600 W · 90 dB · datasheet ↗

Thiele-Small parameters

Nominal size	15"
Impedance	4 Ω
Fs	32.3 Hz
Qts	0.635
Qes	0.764
Qms	3.768
Vas	57 L
Sd	804.2 cm²
Xmax	6.1 mm
Re	3.14 Ω
Bl	17.9 T·m
Mms	386.2 g
Pe	600 W
Sensitivity	90 dB

Alignment hint

EBP	42 · sealed
Sealed Vb (Qtc ≈ 0.71)	≈ 237.5 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
MTX Audio T612S-22	33.6 +1.3	0.602 -0.03	58.9 +1.9	7.4 +1.3	91.2 +1.2	close		+
Lanzar OPTI1535D vp	30 -2.3	0.587 -0.05	55.4 -1.6	10.4 +4.3	88.3 -1.7	close	8 Ω vs 4 Ω: amp load changes	+
MTX Audio TH9515.44	31.9 -0.4	0.653 +0.02	70 +13	6.3 +0.2	93.3 +3.3	close	2 Ω vs 4 Ω: amp load changes	+
Ground Zero GZRW 15XSPL D2	34.1 +1.8	0.59 -0.05	63.3 +6.3	11.3 +5.2	91.1 +1.1	close		+
Rockford Fosgate T2D415	31 -1.3	0.613 -0.02	51.6 -5.4	9.3 +3.2	86.2 -3.8	close	8 Ω vs 4 Ω: amp load changes	+
Monacor RAPTOR 15	39 +6.7	0.696 +0.06	56 -1	7.4 +1.3	92 +2	usable		+
Monacor RAPTOR 15 MK2	39 +6.7	0.696 +0.06	56 -1	7.4 +1.3	92 +2	usable		+
Rockford Fosgate T2D215	31 -1.3	0.523 -0.11	48.4 -8.6	8.7 +2.6	89.7 -0.3	usable		+
DD Audio 615 D2	32.3 =	0.689 +0.05	81.6 +24.6	5 -1.1	90.5 +0.5	usable	8 Ω vs 4 Ω: amp load changes · 300 W vs 600 W: lower power handling · Xmax 5 mm < 6.1 mm: lower excursion-limited SPL	+
Focal 40KX	34.6 +2.3	0.82 +0.18	64.8 +7.8	5.6 -0.5	89.2 -0.8	usable	8 Ω vs 4 Ω: amp load changes · Xmax 5.6 mm < 6.1 mm: lower excursion-limited SPL	+

Compare the closest 3 against the T815-22 →

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.