DD Audio 508e D2

8″ subwoofer · dual 2 Ω · 500 W RMS

Fs 44 HzQts 0.70Vas 0.15 ft³Xmax 0.55″

Recommended box

For a sedan, one sub, 500 W. It’s the same math as the designer’s step-by-step mode, where you can fit the box to your space, vehicle and amp and get plans, a cut sheet and DXF.

Sealed

Net volume0.32 ft³ (9 L)
Qtc0.85
Fc53 Hz
F3 (−3 dB, no cabin gain)47 Hz
Example box (outside)10 1/4″ × 10 1/4″ × 9 1/4″
Open sealed box in designer

Ported

Net volume0.81 ft³ (23 L)
Tuning (Fb)32 Hz
Portround port Ø2 1/2″, 14 3/16″ long
Port velocity at 500 W228 ft/s
F3 (−3 dB, no cabin gain)27 Hz
Example box (outside)20 5/16″ × 15 3/4″ × 7 5/16″
Open ported box in designer
2030405060801001502006066727884HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs44 Hz
Qts0.70
Qes0.82
Qms5.01
Vas0.15 ft³
Re (one coil)≈ 1.7 Ω
Sd≈ 33.3 in²
Xmax0.55″
EBP54 — sealed or ported calc.
Sensitivity, 1 W / 1 m78.4 dB calc.

General

Size8″
Voice coilsdual 2 Ω
RMS power500 W

Mounting dimensions

Ø8 1/4″cutout Ø7 1/8″mounting depth 4 7/8″magnet Ø6 1/8″
Cutout diameter7 1/8″
Mounting depth4 7/8″
Overall diameter8 1/4″
Magnet diameter6 1/8″

“≈” means the value isn’t in the spec sheet and a typical value for the size is used; “calc.” means it’s calculated from the published parameters. Check the manufacturer’s spec sheet before you build.

Data sources

Other DD Audio 8″ models