DC Audio M3 8 D4

8″ subwoofer · dual 4 Ω · 600 W RMS

Fs 35 HzQts 0.60Vas 0.26 ft³Xmax 0.71″

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)
Qtc0.81
Fc47 Hz
F3 (−3 dB, no cabin gain)44 Hz
Example box (outside)10 5/8″ × 10 5/8″ × 8 5/8″
Open sealed box in designer

Ported

Net volume0.88 ft³ (25 L)
Tuning (Fb)30 Hz
Portround port Ø2 1/2″, 14 15/16″ long
Port velocity at 600 W255 ft/s
F3 (−3 dB, no cabin gain)26 Hz
Example box (outside)18 7/8″ × 15 3/4″ × 8 1/4″
Open ported box in designer
2030405060801001502006066727884HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs35 Hz
Qts0.60
Qes0.66
Qms6.68
Vas0.26 ft³
Re (one coil)3.14 Ω
Sd31.3 in²
Xmax0.71″
Vd22.2 in³ calc.
Mms164 g calc.
BL13.1 T·m calc.
EBP53 — sealed or ported calc.
Sensitivity, 1 W / 1 m78.8 dB calc.

General

Size8″
Voice coilsdual 4 Ω
RMS power600 W

Mounting dimensions

Ø8 1/2″cutout Ø7 3/8″mounting depth 5 3/4″magnet Ø≈ 4 13/16″
Cutout diameter7 3/8″
Mounting depth5 3/4″
Overall diameter8 1/2″

“≈” 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 DC Audio 8″ models