URAL AS-D10.3TD4 (4+4)

10″ subwoofer · dual 4 Ω · 500 W RMS

Fs 30.5 HzQts 0.52Vas 1.14 ft³

Recommended box

For a sedan, one sub, 500 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 volume0.85 ft³ (24 L)
Qtc0.80
Fc47 Hz
F3 (−3 dB, no cabin gain)44 Hz
Example box (outside)12 5/8″ × 12 5/8″ × 14″
Open sealed box in designer

Ported

Net volume2.05 ft³ (58 L)
Tuning (Fb)28 Hz
Portslot 1 3/4 × 14 5/16″, 38 1/8″ long
Port velocity at 500 W63 ft/s
F3 (−3 dB, no cabin gain)25 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 12 15/16″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs30.5 Hz
Qts0.52
Qes0.569
Qms6
Vas1.14 ft³
Re (one coil)≈ 3.4 Ω
Sd≈ 52.7 in²
Xmax≈ 0.39″
EBP54 — sealed or ported calc.
Sensitivity, 1 W / 1 m84.1 dB calc.

General

Size10″
Voice coilsdual 4 Ω
RMS power500 W

Mounting dimensions

Ø≈ 10 1/2″cutout Ø9 5/16″mounting depth 6 3/16″magnet Ø≈ 6 1/16″
Cutout diameter9 5/16″
Mounting depth6 3/16″

Only Qts is published — Qms assumed to be 6 and Qes calculated (barely affects box design).

“≈” 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 URAL 10″ models