Earthquake TNT-12S

12″ subwoofer · 4 Ω · 400 W RMS

Fs 32 HzQts 0.80Vas 1.61 ft³

Recommended box

For a sedan, one sub, 400 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)
Qtc1.11
Fc44 Hz
F3 (−3 dB, no cabin gain)35 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)32 Hz
Portslot 1 3/4 × 14 5/16″, 18 7/16″ long
Port velocity at 400 W63 ft/s
F3 (−3 dB, no cabin gain)27 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

Fs32 Hz
Qts0.80
Qes0.903
Qms7.17
Vas1.61 ft³
Re3.6 Ω
Sd≈ 76 in²
Xmax≈ 0.39″
EBP35 — suits sealed calc.
Sensitivity, 1 W / 1 m84.2 dB calc.

General

Size12″
Voice coils4 Ω
RMS power400 W

Mounting dimensions

Ø12 1/16″cutout ≈ Ø10 7/8″mounting depth 6″magnet Ø≈ 7 1/16″
Cutout diameter≈ 10 7/8″
Mounting depth6″
Overall diameter12 1/16″

“≈” 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 Earthquake 12″ models