CT Sounds THERMO-15 D2

15″ subwoofer · dual 2 Ω · 1,500 W RMS

Fs 31.7 HzQts 0.45Vas 1.41 ft³Xmax 0.73″

Recommended box

For a sedan, one sub, 1,500 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 volume1.36 ft³ (38.5 L)
Qtc0.64
Fc45 Hz
F3 (−3 dB, no cabin gain)53 Hz
Example box (outside)17 5/16″ × 17 5/16″ × 11 15/16″
Open sealed box in designer

Ported

Net volume2.33 ft³ (66 L)
Tuning (Fb)29 Hz
Portslot 2 3/8 × 16 11/16″, 48 9/16″ long
Port velocity at 1,500 W78 ft/s
F3 (−3 dB, no cabin gain)27 Hz
Example box (outside)31 1/2″ × 18 1/8″ × 14 13/16″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs31.7 Hz
Qts0.45
Qes0.474
Qms8.44
Vas1.41 ft³
Re (one coil)2 Ω
Sd121.5 in²
Xmax0.73″
Vd88.5 in³ calc.
Mms548 g calc.
BL21.5 T·m calc.
EBP67 — sealed or ported calc.
Sensitivity, 1 W / 1 m86.3 dB calc.

General

Size15″
Voice coilsdual 2 Ω
RMS power1,500 W

Mounting dimensions

Ø15 9/16″cutout Ø14″mounting depth 9 7/16″magnet Ø≈ 9 1/16″
Cutout diameter14″
Mounting depth9 7/16″
Overall diameter15 9/16″

“≈” 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 15″ models