Magnat Bull Power Sub 300

12″ subwoofer · 4 Ω · 180 W RMS

Fs 33 HzQts 0.57Vas 2.90 ft³

Recommended box

For a sedan, one sub, 180 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)
Qtc0.93
Fc54 Hz
F3 (−3 dB, no cabin gain)46 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)38 Hz
Portslot 1 9/16 × 14 5/16″, 10 5/16″ long
Port velocity at 180 W51 ft/s
F3 (−3 dB, no cabin gain)34 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 14 5/16″
Open ported box in designer
203040506080100150200667278849096HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs33 Hz
Qts0.57
Qes0.63
Qms6
Vas2.90 ft³
Re≈ 3.4 Ω
Sd≈ 76 in²
Xmax≈ 0.39″
EBP52 — sealed or ported calc.
Sensitivity, 1 W / 1 m88.7 dB calc.

General

Size12″
Voice coils4 Ω
RMS power180 W

Mounting dimensions

Ø12 3/16″cutout Ø11″mounting depth 5 9/16″magnet Ø≈ 7 3/16″
Cutout diameter11″
Mounting depth5 9/16″
Overall diameter12 3/16″

Only Qts is published — Qms assumed to be 6 and Qes calculated (barely affects box design).

“≈” 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 Magnat 12″ models