URAL AS-D10.3D4 (4+4)

10″ subwoofer · dual 4 Ω · 350 W RMS

Fs 32.6 HzQts 0.47Vas 1.63 ft³Xmax 0.37″
The published specs don’t add up:

Recommended box

For a sedan, one sub, 350 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 volume0.88 ft³ (25 L)
Qtc0.80
Fc55 Hz
F3 (−3 dB, no cabin gain)52 Hz
Example box (outside)12 5/8″ × 12 5/8″ × 14 1/2″
Open sealed box in designer

Ported

Net volume2.05 ft³ (58 L)
Tuning (Fb)34 Hz
Portslot 1 9/16 × 14 5/16″, 21 9/16″ long
Port velocity at 350 W63 ft/s
F3 (−3 dB, no cabin gain)31 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 11 7/16″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs32.6 Hz
Qts0.47
Qes0.496
Qms9.71
Vas1.63 ft³
Re (one coil)2.3 Ω
Sd≈ 52.7 in²
Xmax0.37″
EBP66 — sealed or ported calc.
Sensitivity, 1 W / 1 m87.1 dB calc.

General

Size10″
Voice coilsdual 4 Ω
RMS power350 W

Mounting dimensions

Ø≈ 10 1/2″cutout Ø9 5/16″mounting depth 5 1/2″magnet Ø≈ 6 1/16″
Cutout diameter9 5/16″
Mounting depth5 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 URAL 10″ models