DD Audio 615 D2

15" · 8 Ω · 300 W · 90.5 dB · datasheet ↗

Thiele-Small parameters

Nominal size	15"
Impedance	8 Ω
Fs	32.3 Hz
Qts	0.689
Qes	0.78
Qms	5.94
Vas	81.6 L
Sd	856.1 cm²
Xmax	5 mm
Re	4 Ω
Bl	17.8 T·m
Mms	305.7 g
Pe	300 W
Sensitivity	90.5 dB

Alignment hint

EBP	41 · sealed
Sealed Vb (Qtc ≈ 0.71)	≈ 1532.4 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 TH9515.44	31.9 -0.4	0.653 -0.04	70 -11.6	6.3 +1.3	93.3 +2.8	close	2 Ω vs 8 Ω: amp load changes	+
MTX Audio T815-22	32.3 =	0.635 -0.05	57 -24.6	6.1 +1.1	90 -0.5	usable	4 Ω vs 8 Ω: amp load changes	+
Dayton Audio UMII15-22	29 -3.3	0.701 +0.01	96 +14.4	9.3 +4.3	88.5 -2	usable		+
JBL GT5-15	27.3 -5	0.671 -0.02	106.5 +24.9	6.3 +1.3	90 -0.5	usable	4 Ω vs 8 Ω: amp load changes	+
Focal 40KX	34.6 +2.3	0.82 +0.13	64.8 -16.8	5.6 +0.6	89.2 -1.3	usable		+
MTX Audio T612S-22	33.6 +1.3	0.602 -0.09	58.9 -22.7	7.4 +2.4	91.2 +0.7	usable	4 Ω vs 8 Ω: amp load changes	+
American Bass DX 15	30.4 -1.9	0.56 -0.13	89.6 +8	15 +10	90 -0.5	usable	4 Ω vs 8 Ω: amp load changes	+
Ground Zero GZRW 15XSPL D2	34.1 +1.8	0.59 -0.1	63.3 -18.3	11.3 +6.3	91.1 +0.6	usable	4 Ω vs 8 Ω: amp load changes	+
Monacor RAPTOR 15	39 +6.7	0.696 +0.01	56 -25.6	7.4 +2.4	92 +1.5	usable	4 Ω vs 8 Ω: amp load changes	+
Monacor RAPTOR 15 MK2	39 +6.7	0.696 +0.01	56 -25.6	7.4 +2.4	92 +1.5	usable	4 Ω vs 8 Ω: amp load changes	+

Compare the closest 3 against the 615 D2 →

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.