Pyle PLBW84

8″ subwoofer · dual 4 Ω

Fs 60 HzQts 0.76Vas 2.39 ft³

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 volume0.78 ft³ (22 L)
Qtc1.54
Fc121 Hz
F3 (−3 dB, no cabin gain)88 Hz
Example box (outside)10 1/4″ × 10 1/4″ × 19 7/16″
Open sealed box in designer

Ported

Net volume1.31 ft³ (37 L)
Tuning (Fb)50 Hz
Portslot 1 9/16 × 14 5/16″, 14 9/16″ long
Port velocity at 300 W33 ft/s
F3 (−3 dB, no cabin gain)71 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 7 13/16″
Open ported box in designer
2030405060801001502007278849096102HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs60 Hz
Qts0.76
Qes0.89
Qms5.23
Vas2.39 ft³
Re (one coil)≈ 3.4 Ω
Sd≈ 33.3 in²
Xmax≈ 0.39″
EBP67 — sealed or ported calc.
Sensitivity, 1 W / 1 m94.2 dB calc.

General

Size8″
Voice coilsdual 4 Ω
RMS power—

Mounting dimensions

Ø8 13/16″cutout Ø7 3/16″mounting depth 4 5/16″magnet Ø≈ 4 11/16″
Cutout diameter7 3/16″
Mounting depth4 5/16″
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