Polk Audio dX10-8

10″ subwoofer · 8 Ω · 300 W RMS

31.2 HzFs, resonance
0.64Qts
1.16 ft³Vas
0.30″Xmax
300 WRMS
Sourceweb.archive.org · manufacturer data
Checked against sourceOctober 2026
Thiele/Small parameterscomplete
Mounting dimensions1 of 4 — missing: mounting depth, frame outer diameter, magnet diameter; the designer will use an estimate

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

smaller, tighter
1.17 ft³ (33 L)
Net volume
Bass character (Qtc)Tight and punchy · 0.91
Fc44 Hz
F3 (−3 dB, no cabin gain)38 Hz
Example box (outside)12 5/8″ × 12 5/8″ × 18 3/8″
Open sealed box in designer

Ported

deeper, louder
0.92 ft³ (26 L)
Net volume
Tuning (Fb)38 Hz
Port2 round ports Ø2 1/2″, 18 1/4″ long
Port velocity at 300 W77 ft/s
F3 (−3 dB, no cabin gain)35 Hz
Example box (outside)23 1/8″ × 15 3/4″ × 7 11/16″
Open ported box in designer

Deeper: 1.98 ft³ (56 L) tuned to 31 Hz, 31 1/2″ × 15 3/4″ × 11 5/8″ outside — a bigger box with flatter deep bass. Open in the calculator

Where to buy Amazon
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Size10″
Voice coils8 Ω
RMS power300 W
Fs31.2 Hz
Qts0.64
Qes0.7
Qms7.65
Vas1.16 ft³
Re8.6 Ω
Sd51.2 in²
Xmax0.30″
Vd15.1 in³ calc.
Mms122 g calc.
BL17.1 T·m calc.
EBP45 — suits sealed calc.
Sensitivity, 1 W / 1 m83.6 dB calc.

Mounting dimensions

Ø≈ 10 1/2″cutout Ø9 5/16″mounting depth ≈ 5 1/8″magnet Ø≈ 6 1/16″
Cutout diameter9 5/16″
Mounting depth≈ 5 1/8″

“≈” 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 Polk Audio 10″ models

Similar 10″ subwoofers from other brands

Close in Fs, Qts and Vas — a box of similar volume will suit them.

FAQ

What box does the Polk Audio dX10-8 need?

Recommended net volume: 1.17 ft³ sealed, 0.92 ft³ ported tuned to 38 Hz — for one sub in a sedan at 300 W. Fit the box to your space and amp in the free calculator, with plans and a cut sheet.

What are the Polk Audio dX10-8 Thiele/Small specs?

Fs 31.2 Hz, Qts 0.64, Vas 1.16 ft³, Xmax 0.30″, Sd 51.2 in².

How much power does the Polk Audio dX10-8 handle and how do I wire it?

RMS power rating: 300 W. Wiring for several subs and amp power — in the wiring calculator.