Audison Prima APS 8 D (DVC 4+4 ohm)

8″ subwoofer · dual 4 Ω · 250 W RMS

Fs 30 HzQts 0.42Vas 0.90 ft³Xmax 0.35″

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 volume0.35 ft³ (10 L)
Qtc0.80
Fc57 Hz
F3 (−3 dB, no cabin gain)54 Hz
Example box (outside)10 5/8″ × 10 5/8″ × 9 5/16″
Open sealed box in designer

Ported

Net volume1.13 ft³ (32 L)
Tuning (Fb)30 Hz
Port2 round ports Ø2 1/2″, 24 3/8″ long
Port velocity at 250 W84 ft/s
F3 (−3 dB, no cabin gain)28 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 6 13/16″
Open ported box in designer
2030405060801001502006066727884HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs30 Hz
Qts0.42
Qes0.46
Qms5.1
Vas0.90 ft³
Re (one coil)4.2 Ω
Sd36.4 in²
Xmax0.35″
Vd12.6 in³ calc.
Mms86 g calc.
BL12.2 T·m calc.
EBP65 — sealed or ported calc.
Sensitivity, 1 W / 1 m83.8 dB calc.

General

Size8″
Voice coilsdual 4 Ω
RMS power250 W

Mounting dimensions

Ø8 3/4″cutout Ø7 3/8″mounting depth 3 1/8″magnet Ø4 3/4″
Cutout diameter7 3/8″
Mounting depth3 1/8″
Overall diameter8 3/4″
Magnet diameter4 3/4″

“≈” 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 Audison 8″ models