CT Sounds STRATO-8 D4

8″ subwoofer · dual 4 Ω · 600 W RMS

Fs 45.9 HzQts 0.85Vas 0.10 ft³Xmax 0.47″

Recommended box

For a sedan, one sub, 600 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 volume0.34 ft³ (9.5 L)
Qtc0.97
Fc53 Hz
F3 (−3 dB, no cabin gain)43 Hz
Example box (outside)10 5/8″ × 10 5/8″ × 8 15/16″
Open sealed box in designer

Ported

Net volume0.99 ft³ (28 L)
Tuning (Fb)29 Hz
Portround port Ø2 1/2″, 14 3/16″ long
Port velocity at 600 W268 ft/s
F3 (−3 dB, no cabin gain)25 Hz
Example box (outside)19 11/16″ × 15 3/4″ × 8 11/16″
Open ported box in designer
2030405060801001502006066727884HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs45.9 Hz
Qts0.85
Qes0.94
Qms8.51
Vas0.10 ft³
Re (one coil)3.2 Ω
Sd29.2 in²
Xmax0.47″
Vd13.8 in³ calc.
Mms204 g calc.
BL14.2 T·m calc.
EBP49 — suits sealed calc.
Sensitivity, 1 W / 1 m76.9 dB calc.

General

Size8″
Voice coilsdual 4 Ω
RMS power600 W

Mounting dimensions

Ø8 13/16″cutout Ø7 1/2″mounting depth 6 1/4″magnet Ø≈ 4 7/8″
Cutout diameter7 1/2″
Mounting depth6 1/4″
Overall diameter8 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 8″ models