Magnat Shockwave 1200

12″ subwoofer · 4 Ω · 300 W RMS

Fs 28 HzQts 0.28Vas 4.24 ft³

Recommended box

For a sedan, one sub, 300 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 volume0.71 ft³ (20 L)
Qtc0.74
Fc74 Hz
F3 (−3 dB, no cabin gain)76 Hz
Example box (outside)14 3/16″ × 14 3/16″ × 10 1/16″
Open sealed box in designer

Ported

Net volume1.66 ft³ (47 L)
Tuning (Fb)40 Hz
Portslot 1 9/16 × 14 5/16″, 18 13/16″ long
Port velocity at 300 W52 ft/s
F3 (−3 dB, no cabin gain)43 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 9 13/16″
Open ported box in designer
203040506080100150200667278849096HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs28 Hz
Qts0.28
Qes0.294
Qms6
Vas4.24 ft³
Re≈ 3.4 Ω
Sd≈ 76 in²
Xmax≈ 0.39″
EBP95 — sealed or ported calc.
Sensitivity, 1 W / 1 m91.5 dB calc.

General

Size12″
Voice coils4 Ω
RMS power300 W

Mounting dimensions

Ø12″cutout Ø11″mounting depth 4 15/16″magnet Ø≈ 7 1/8″
Cutout diameter11″
Mounting depth4 15/16″
Overall diameter12″

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