Rockville W12K5S4

12″ subwoofer · 4 Ω · 350 W RMS

Fs 37.3 HzQts 0.61Vas 1.69 ft³Xmax 0.31″

Recommended box

For a sedan, one sub, 350 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)
Qtc0.86
Fc52 Hz
F3 (−3 dB, no cabin gain)47 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 8 3/4″
Open sealed box in designer

Ported

Net volume2.93 ft³ (83 L)
Tuning (Fb)35 Hz
Portslot 1 15/16 × 14 5/16″, 16 5/8″ long
Port velocity at 350 W60 ft/s
F3 (−3 dB, no cabin gain)31 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 14 15/16″
Open ported box in designer
203040506080100150200667278849096HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs37.3 Hz
Qts0.61
Qes0.675
Qms6.43
Vas1.69 ft³
Re3.31 Ω
Sd76.1 in²
Xmax0.31″
Vd24 in³ calc.
Mms130 g calc.
BL12.2 T·m calc.
EBP55 — sealed or ported calc.
Sensitivity, 1 W / 1 m87.7 dB calc.

General

Size12″
Voice coils4 Ω
RMS power350 W

Mounting dimensions

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