AMP MASS 500 12D2

12″ subwoofer · dual 2 Ω · 500 W RMS

Fs 30.2 HzQts 0.57Vas 1.43 ft³Xmax 0.59″

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 volume1.48 ft³ (42 L)
Qtc0.80
Fc42 Hz
F3 (−3 dB, no cabin gain)40 Hz
Example box (outside)14 3/16″ × 14 3/16″ × 18 5/16″
Open sealed box in designer

Ported

Net volume2.83 ft³ (80 L)
Tuning (Fb)28 Hz
Portslot 2 3/16 × 14 5/16″, 32 7/8″ long
Port velocity at 500 W60 ft/s
F3 (−3 dB, no cabin gain)24 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 16 3/16″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs30.2 Hz
Qts0.57
Qes0.642
Qms5.11
Vas1.43 ft³
Re (one coil)≈ 1.7 Ω
Sd73 in²
Xmax0.59″
Vd43.1 in³ calc.
Mms215 g calc.
BL10.4 T·m calc.
EBP47 — suits sealed calc.
Sensitivity, 1 W / 1 m84.4 dB calc.

General

Size12″
Voice coilsdual 2 Ω
RMS power500 W

Mounting dimensions

Ø12 5/8″cutout Ø11″mounting depth 5 13/16″magnet Ø6 1/8″
Cutout diameter11″
Mounting depth5 13/16″
Overall diameter12 5/8″
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 AMP 12″ models