Rockville W12K9D2 V3

12″ subwoofer · dual 2 Ω · 1,000 W RMS

Fs 33.1 HzQts 0.45Vas 1.30 ft³Xmax 1.10″

Recommended box

For a sedan, one sub, 1,000 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 volume0.78 ft³ (22 L)
Qtc0.74
Fc54 Hz
F3 (−3 dB, no cabin gain)55 Hz
Example box (outside)14 3/16″ × 14 3/16″ × 10 13/16″
Open sealed box in designer

Ported

Net volume1.98 ft³ (56 L)
Tuning (Fb)32 Hz
Portslot 2 9/16 × 14 5/16″, 43 7/16″ long
Port velocity at 1,000 W64 ft/s
F3 (−3 dB, no cabin gain)29 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 14 1/4″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs33.1 Hz
Qts0.45
Qes0.48
Qms7.23
Vas1.30 ft³
Re (one coil)2 Ω
Sd84.4 in²
Xmax1.10″
Vd93.1 in³ calc.
Mms264 g calc.
BL15.1 T·m calc.
EBP69 — sealed or ported calc.
Sensitivity, 1 W / 1 m86.4 dB calc.

General

Size12″
Voice coilsdual 2 Ω
RMS power1,000 W

Mounting dimensions

Ø≈ 12 5/16″cutout Ø11 1/8″mounting depth 6 7/8″magnet Ø7 1/2″
Cutout diameter11 1/8″
Mounting depth6 7/8″
Magnet diameter7 1/2″

Cone area (Sd) calculated from Fs, Vas and Mms: 84.4 in².

“≈” 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 Rockville 12″ models