DC Audio Level 1 12 D4

12″ subwoofer · dual 4 Ω · 300 W RMS

Fs 32.6 HzQts 0.42Vas 1.68 ft³Xmax 0.75″

Recommended box

For a sedan, one sub, 300 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 volume0.67 ft³ (19 L)
Qtc0.79
Fc61 Hz
F3 (−3 dB, no cabin gain)59 Hz
Example box (outside)14 9/16″ × 14 9/16″ × 9 3/16″
Open sealed box in designer

Ported

Net volume2.15 ft³ (61 L)
Tuning (Fb)33 Hz
Portslot 1 9/16 × 14 5/16″, 21 13/16″ long
Port velocity at 300 W57 ft/s
F3 (−3 dB, no cabin gain)31 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 12″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs32.6 Hz
Qts0.42
Qes0.51
Qms2.52
Vas1.68 ft³
Re (one coil)≈ 3.4 Ω
Sd74.6 in²
Xmax0.75″
Vd55.8 in³ calc.
Mms164 g calc.
BL15 T·m calc.
EBP64 — sealed or ported calc.
Sensitivity, 1 W / 1 m87.1 dB calc.

General

Size12″
Voice coilsdual 4 Ω
RMS power300 W

Mounting dimensions

Ø12 1/2″cutout Ø11 1/4″mounting depth 6 1/2″magnet Ø≈ 7 5/16″
Cutout diameter11 1/4″
Mounting depth6 1/2″
Overall diameter12 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 12″ models