DD Audio 9512L ESP D1

12″ subwoofer · dual 1 Ω · 2,500 W RMS

Fs 37.7 HzQts 0.66Vas 0.93 ft³Xmax 1.26″

Recommended box

For a sedan, one sub, 2,500 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 volume1.73 ft³ (49 L)
Qtc0.82
Fc47 Hz
F3 (−3 dB, no cabin gain)43 Hz
Example box (outside)15 3/8″ × 15 3/8″ × 17 3/4″
Open sealed box in designer

Ported

Net volume2.93 ft³ (83 L)
Tuning (Fb)30 Hz
Portslot 4 1/2 × 14 3/4″, 60 13/16″ long
Port velocity at 2,500 W69 ft/s
F3 (−3 dB, no cabin gain)26 Hz
Example box (outside)31 1/2″ × 16 1/8″ × 23 1/2″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs37.7 Hz
Qts0.66
Qes0.732
Qms6.9
Vas0.93 ft³
Re (one coil)≈ 0.85 Ω
Sd≈ 76 in²
Xmax1.26″
EBP51 — sealed or ported calc.
Sensitivity, 1 W / 1 m84.8 dB calc.

General

Size12″
Voice coilsdual 1 Ω
RMS power2,500 W

Mounting dimensions

Ø13 3/8″cutout Ø12 3/16″mounting depth 9 3/4″magnet Ø≈ 7 15/16″
Cutout diameter12 3/16″
Mounting depth9 3/4″
Overall diameter13 3/8″

“≈” 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 12″ models