AMP MASS 800 12D2 V.2

12″ subwoofer · dual 2 Ω · 800 W RMS

Fs 29.1 HzQts 0.37Vas 1.75 ft³Xmax 0.71″

Recommended box

For a sedan, one sub, 800 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)
Qtc0.68
Fc54 Hz
F3 (−3 dB, no cabin gain)60 Hz
Example box (outside)14 3/16″ × 14 3/16″ × 10 1/16″
Open sealed box in designer

Ported

Net volume1.45 ft³ (41 L)
Tuning (Fb)33 Hz
Portslot 1 15/16 × 14 5/16″, 43 7/16″ long
Port velocity at 800 W61 ft/s
F3 (−3 dB, no cabin gain)32 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 11 5/16″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs29.1 Hz
Qts0.37
Qes0.4
Qms4.19
Vas1.75 ft³
Re (one coil)≈ 1.7 Ω
Sd76.1 in²
Xmax0.71″
Vd53.9 in³ calc.
Mms206 g calc.
BL12.7 T·m calc.
EBP73 — sealed or ported calc.
Sensitivity, 1 W / 1 m86.9 dB calc.

General

Size12″
Voice coilsdual 2 Ω
RMS power800 W

Mounting dimensions

Ø12 11/16″cutout Ø11″mounting depth 6 1/8″magnet Ø6 11/16″
Cutout diameter11″
Mounting depth6 1/8″
Overall diameter12 11/16″
Magnet diameter6 11/16″

“≈” 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 AMP 12″ models