STX W.25.400.2x4.MC

10″ subwoofer · dual 4 Ω · 300 W RMS

Fs 32 HzQts 0.33Vas 1.24 ft³Xmax 0.30″

Recommended box

For a sedan, one sub, 300 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 volume0.46 ft³ (13 L)
Qtc0.63
Fc61 Hz
F3 (−3 dB, no cabin gain)73 Hz
Example box (outside)12 3/16″ × 12 3/16″ × 9 3/16″
Open sealed box in designer

Ported

Net volume0.92 ft³ (26 L)
Tuning (Fb)37 Hz
Port2 round ports Ø2 1/2″, 19 3/8″ long
Port velocity at 300 W87 ft/s
F3 (−3 dB, no cabin gain)37 Hz
Example box (outside)25 1/2″ × 15 3/4″ × 7 1/16″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs32 Hz
Qts0.33
Qes0.37
Qms3
Vas1.24 ft³
Re (one coil)2.8 Ω
Sd48.8 in²
Xmax0.30″
Vd14.4 in³ calc.
Mms99 g calc.
BL12.3 T·m calc.
EBP86 — sealed or ported calc.
Sensitivity, 1 W / 1 m86.9 dB calc.

General

Size10″
Voice coilsdual 4 Ω
RMS power300 W

Mounting dimensions

Ø10 1/16″cutout Ø9 3/16″mounting depth 4 9/16″magnet Ø≈ 6″
Cutout diameter9 3/16″
Mounting depth4 9/16″
Overall diameter10 1/16″

“≈” 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 STX 10″ models