Audio System HX 08 SQ

8″ subwoofer · 4 Ω · 250 W RMS

Fs 35.3 HzQts 0.47Vas 0.56 ft³Xmax 0.37″

Recommended box

For a sedan, one sub, 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 volume0.32 ft³ (9 L)
Qtc0.78
Fc59 Hz
F3 (−3 dB, no cabin gain)57 Hz
Example box (outside)10 5/8″ × 10 5/8″ × 8 5/8″
Open sealed box in designer

Ported

Net volume0.95 ft³ (27 L)
Tuning (Fb)32 Hz
Portround port Ø3″, 17 1/16″ long
Port velocity at 250 W115 ft/s
F3 (−3 dB, no cabin gain)29 Hz
Example box (outside)21 13/16″ × 15 3/4″ × 7 7/8″
Open ported box in designer
2030405060801001502006066727884HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs35.3 Hz
Qts0.47
Qes0.52
Qms4.8
Vas0.56 ft³
Re4.1 Ω
Sd33.5 in²
Xmax0.37″
Vd12.3 in³ calc.
Mms85 g calc.
BL12.2 T·m calc.
EBP68 — sealed or ported calc.
Sensitivity, 1 W / 1 m83.3 dB calc.

General

Size8″
Voice coils4 Ω
RMS power250 W

Mounting dimensions

Ø8 1/2″cutout Ø7 5/16″mounting depth 5 3/8″magnet Ø≈ 4 3/4″
Cutout diameter7 5/16″
Mounting depth5 3/8″
Overall diameter8 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 Audio System 8″ models