CT Sounds BIO-10 D4

10″ subwoofer · dual 4 Ω · 400 W RMS

Fs 35.5 HzQts 0.60Vas 0.93 ft³Xmax 0.30″

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 volume1.17 ft³ (33 L)
Qtc0.80
Fc48 Hz
F3 (−3 dB, no cabin gain)44 Hz
Example box (outside)12 3/16″ × 12 3/16″ × 19 11/16″
Open sealed box in designer

Ported

Net volume2.01 ft³ (57 L)
Tuning (Fb)31 Hz
Portslot 1 9/16 × 14 5/16″, 27 1/4″ long
Port velocity at 400 W65 ft/s
F3 (−3 dB, no cabin gain)27 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 11 11/16″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs35.5 Hz
Qts0.60
Qes0.67
Qms5.63
Vas0.93 ft³
Re (one coil)3.7 Ω
Sd52.2 in²
Xmax0.30″
Vd15.4 in³ calc.
Mms123 g calc.
BL12.3 T·m calc.
EBP53 — sealed or ported calc.
Sensitivity, 1 W / 1 m84.4 dB calc.

General

Size10″
Voice coilsdual 4 Ω
RMS power400 W

Mounting dimensions

Ø10 5/16″cutout Ø9 1/8″mounting depth 4 11/16″magnet Ø≈ 5 15/16″
Cutout diameter9 1/8″
Mounting depth4 11/16″
Overall diameter10 5/16″

“≈” 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 10″ models