DD Audio 608d D2

8″ subwoofer · dual 2 Ω · 600 W RMS

Fs 38.4 HzQts 0.46Vas 0.26 ft³Xmax 0.51″

Recommended box

For a sedan, one sub, 600 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)
Qtc0.62
Fc52 Hz
F3 (−3 dB, no cabin gain)62 Hz
Example box (outside)10 5/8″ × 10 5/8″ × 8 5/8″
Open sealed box in designer

Ported

Net volume0.64 ft³ (18 L)
Tuning (Fb)39 Hz
Portround port Ø2 1/2″, 11 15/16″ long
Port velocity at 600 W248 ft/s
F3 (−3 dB, no cabin gain)34 Hz
Example box (outside)13 15/16″ × 15 3/4″ × 8 1/4″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs38.4 Hz
Qts0.46
Qes0.499
Qms5.76
Vas0.26 ft³
Re (one coil)≈ 1.7 Ω
Sd≈ 33.3 in²
Xmax0.51″
EBP77 — sealed or ported calc.
Sensitivity, 1 W / 1 m81.2 dB calc.

General

Size8″
Voice coilsdual 2 Ω
RMS power600 W

Mounting dimensions

Ø8 5/16″cutout Ø7 3/8″mounting depth 5 3/4″magnet Ø≈ 4 13/16″
Cutout diameter7 3/8″
Mounting depth5 3/4″
Overall diameter8 5/16″

“≈” 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