CT Sounds STRATO-15 D2

15″ subwoofer · dual 2 Ω · 1,250 W RMS

Fs 28.2 HzQts 0.58Vas 2.22 ft³Xmax 0.59″

Recommended box

For a sedan, one sub, 1,250 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 volume2.47 ft³ (70 L)
Qtc0.80
Fc39 Hz
F3 (−3 dB, no cabin gain)36 Hz
Example box (outside)31 1/2″ × 17 11/16″ × 10 3/4″
Open sealed box in designer

Ported

Net volume4.84 ft³ (137 L)
Tuning (Fb)25 Hz
Portslot 3 9/16 × 16 5/16″, 44 3/4″ long
Port velocity at 1,250 W64 ft/s
F3 (−3 dB, no cabin gain)22 Hz
Example box (outside)31 1/2″ × 17 11/16″ × 25 1/4″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs28.2 Hz
Qts0.58
Qes0.636
Qms6.67
Vas2.22 ft³
Re (one coil)1.96 Ω
Sd124.7 in²
Xmax0.59″
Vd73.6 in³ calc.
Mms464 g calc.
BL15.9 T·m calc.
EBP44 — suits sealed calc.
Sensitivity, 1 W / 1 m85.5 dB calc.

General

Size15″
Voice coilsdual 2 Ω
RMS power1,250 W

Mounting dimensions

Ø15 1/2″cutout Ø13 7/8″mounting depth 8 1/8″magnet Ø≈ 9 1/16″
Cutout diameter13 7/8″
Mounting depth8 1/8″
Overall diameter15 1/2″

“≈” 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