CT Sounds TROPO-XL-12 D2

12″ subwoofer · dual 2 Ω · 1,000 W RMS

Fs 34.6 HzQts 0.57Vas 0.94 ft³Xmax 0.55″

Recommended box

For a sedan, one sub, 1,000 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 volume0.95 ft³ (27 L)
Qtc0.80
Fc49 Hz
F3 (−3 dB, no cabin gain)46 Hz
Example box (outside)14 3/16″ × 14 3/16″ × 12 11/16″
Open sealed box in designer

Ported

Net volume2.75 ft³ (78 L)
Tuning (Fb)27 Hz
Portslot 2 15/16 × 14 5/16″, 50 15/16″ long
Port velocity at 1,000 W63 ft/s
F3 (−3 dB, no cabin gain)24 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 18 13/16″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs34.6 Hz
Qts0.57
Qes0.621
Qms6.35
Vas0.94 ft³
Re (one coil)1.9 Ω
Sd82.3 in²
Xmax0.55″
Vd45.4 in³ calc.
Mms317 g calc.
BL14.5 T·m calc.
EBP56 — sealed or ported calc.
Sensitivity, 1 W / 1 m84.5 dB calc.

General

Size12″
Voice coilsdual 2 Ω
RMS power1,000 W

Mounting dimensions

Ø12 13/16″cutout Ø11″mounting depth 7″magnet Ø≈ 7 1/8″
Cutout diameter11″
Mounting depth7″
Overall diameter12 13/16″

“≈” 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 CT Sounds 12″ models