Bomber Upgrade Evo 500W 4 Ohm (SW12UPEVO500-4)

12″ subwoofer · 4 Ω · 500 W RMS

Fs 45 HzQts 0.87Vas 1.16 ft³Xmax 0.26″

Recommended box

For a sedan, one sub, 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)
Qtc1.12
Fc58 Hz
F3 (−3 dB, no cabin gain)45 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)39 Hz
Portslot 2 3/8 × 14 5/16″, 15 1/2″ long
Port velocity at 500 W64 ft/s
F3 (−3 dB, no cabin gain)32 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 15″
Open ported box in designer
203040506080100150200667278849096HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs45 Hz
Qts0.87
Qes0.98
Qms7.46
Vas1.16 ft³
Re3.02 Ω
Sd76.1 in²
Xmax0.26″
Vd19.5 in³ calc.
Mms130 g calc.
BL10.6 T·m calc.
EBP46 — suits sealed calc.
Sensitivity, 1 W / 1 m86.9 dB calc.

General

Size12″
Voice coils4 Ω
RMS power500 W

Mounting dimensions

Ø12 3/16″cutout ≈ Ø10 15/16″mounting depth 6″magnet Ø6 5/8″
Cutout diameter≈ 10 15/16″
Mounting depth6″
Overall diameter12 3/16″
Magnet diameter6 5/8″

“≈” 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 Bomber 12″ models