DC Audio NEO 4.0 18 D0.7

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

Fs 30.4 HzQts 0.34Vas 2.37 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 volume2.54 ft³ (72 L)
Qtc0.48
Fc42 Hz
F3 (−3 dB, no cabin gain)71 Hz
Example box (outside)20 1/16″ × 20 1/16″ × 15 7/16″
Open sealed box in designer

Ported

Net volume3.43 ft³ (97 L)
Tuning (Fb)28 Hz
Portslot 3 1/8 × 19 7/16″, 54 1/2″ long
Port velocity at 4,500 W107 ft/s
F3 (−3 dB, no cabin gain)27 Hz
Example box (outside)31 1/2″ × 20 7/8″ × 19 1/16″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs30.4 Hz
Qts0.34
Qes0.36
Qms8.08
Vas2.37 ft³
Re (one coil)≈ 0.6 Ω
Sd179.6 in²
Xmax1.34″
Vd240.5 in³ calc.
Mms779 g calc.
BL15.7 T·m calc.
EBP84 — sealed or ported calc.
Sensitivity, 1 W / 1 m89.2 dB calc.

General

Size18″
Voice coilsdual 0.7 Ω
RMS power4,500 W

Mounting dimensions

Ø18 1/2″cutout Ø16 7/8″mounting depth 13″magnet Ø≈ 11″
Cutout diameter16 7/8″
Mounting depth13″
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