Alpine SWR-1022D (Type-R)

10″ subwoofer · dual 2 Ω · 500 W RMS

Fs 31 HzQts 0.50Vas 0.71 ft³Xmax 0.71″

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 volume0.46 ft³ (13 L)
Qtc0.80
Fc49 Hz
F3 (−3 dB, no cabin gain)47 Hz
Example box (outside)12 3/16″ × 12 3/16″ × 9 3/16″
Open sealed box in designer

Ported

Net volume1.45 ft³ (41 L)
Tuning (Fb)27 Hz
Port2 round ports Ø2 1/2″, 23 7/16″ long
Port velocity at 500 W135 ft/s
F3 (−3 dB, no cabin gain)24 Hz
Example box (outside)27 7/16″ × 15 3/4″ × 9 1/4″
Open ported box in designer
2030405060801001502006066727884HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs31 Hz
Qts0.50
Qes0.53
Qms8.67
Vas0.71 ft³
Re (one coil)1.85 Ω
Sd51.5 in²
Xmax0.71″
Vd36.7 in³ calc.
Mms206 g calc.
BL11.8 T·m calc.
EBP58 — sealed or ported calc.
Sensitivity, 1 W / 1 m82.5 dB calc.

General

Size10″
Voice coilsdual 2 Ω
RMS power500 W

Mounting dimensions

Ø10 11/16″cutout Ø9 1/8″mounting depth 6 3/4″magnet Ø≈ 5 15/16″
Cutout diameter9 1/8″
Mounting depth6 3/4″
Overall diameter10 11/16″

“≈” 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

Other Alpine 10″ models