DC Audio Level 6 M6 18 D0.7

18″ subwoofer · dual 0.7 Ω · 4,500 W RMS

Fs 26.4 HzQts 0.48Vas 3.13 ft³Xmax 1.34″

Recommended box

For a sedan, one sub, 4,500 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 volume2.75 ft³ (78 L)
Qtc0.70
Fc39 Hz
F3 (−3 dB, no cabin gain)41 Hz
Example box (outside)20 1/16″ × 20 1/16″ × 16 1/2″
Open sealed box in designer

Ported

Net volume5.58 ft³ (158 L)
Tuning (Fb)25 Hz
Portround port Ø5″, 11 3/8″ long
Port velocity at 4,500 W386 ft/s
F3 (−3 dB, no cabin gain)22 Hz
Example box (outside)31 1/2″ × 20 7/8″ × 19 1/4″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs26.4 Hz
Qts0.48
Qes0.512
Qms6.87
Vas3.13 ft³
Re (one coil)≈ 0.6 Ω
Sd179.6 in²
Xmax1.34″
Vd240.5 in³ calc.
Mms781 g calc.
BL12.3 T·m calc.
EBP52 — sealed or ported calc.
Sensitivity, 1 W / 1 m87 dB calc.

General

Size18″
Voice coilsdual 0.7 Ω
RMS power4,500 W

Mounting dimensions

Ø18 1/2″cutout Ø16 7/8″mounting depth 14″magnet Ø≈ 11″
Cutout diameter16 7/8″
Mounting depth14″
Overall diameter18 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 18″ models