Rockville W12K6D2 V2

12″ subwoofer · dual 2 Ω · 600 W RMS

Fs 35.6 HzQts 0.52Vas 1.51 ft³
The published specs don’t add up:

Recommended box

For a sedan, one sub, 600 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 volume1.06 ft³ (30 L)
Qtc0.80
Fc55 Hz
F3 (−3 dB, no cabin gain)52 Hz
Example box (outside)14 3/16″ × 14 3/16″ × 13 13/16″
Open sealed box in designer

Ported

Net volume2.93 ft³ (83 L)
Tuning (Fb)32 Hz
Portslot 2 3/8 × 14 5/16″, 25 5/16″ long
Port velocity at 600 W65 ft/s
F3 (−3 dB, no cabin gain)29 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 16 1/16″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs35.6 Hz
Qts0.52
Qes0.57
Qms5.39
Vas1.51 ft³
Re (one coil)2 Ω
Sd≈ 76 in²
Xmax≈ 0.39″
EBP62 — sealed or ported calc.
Sensitivity, 1 W / 1 m87.3 dB calc.

General

Size12″
Voice coilsdual 2 Ω
RMS power600 W

Mounting dimensions

Ø≈ 12 5/16″cutout Ø11 1/8″mounting depth 5 3/4″magnet Ø6 1/8″
Cutout diameter11 1/8″
Mounting depth5 3/4″
Magnet diameter6 1/8″

“≈” 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 Rockville 12″ models