Alpine SWR-10D4 (Type-R)

10″ subwoofer · dual 4 Ω · 1,000 W RMS

Fs 32 HzQts 0.54Vas 0.64 ft³Xmax 0.79″

Recommended box

For a sedan, one sub, 1,000 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 volume0.57 ft³ (16 L)
Qtc0.79
Fc47 Hz
F3 (−3 dB, no cabin gain)44 Hz
Example box (outside)12 3/16″ × 12 3/16″ × 10 3/4″
Open sealed box in designer

Ported

Net volume1.66 ft³ (47 L)
Tuning (Fb)26 Hz
Port2 round ports Ø2 1/2″, 21 15/16″ long
Port velocity at 1,000 W204 ft/s
F3 (−3 dB, no cabin gain)23 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 9″
Open ported box in designer
2030405060801001502006066727884HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs32 Hz
Qts0.54
Qes0.59
Qms7.05
Vas0.64 ft³
Re (one coil)3.8 Ω
Sd51.6 in²
Xmax0.79″
Vd40.6 in³ calc.
Mms216 g calc.
BL16.7 T·m calc.
EBP54 — sealed or ported calc.
Sensitivity, 1 W / 1 m82 dB calc.

General

Size10″
Voice coilsdual 4 Ω
RMS power1,000 W

Mounting dimensions

Ø10 11/16″cutout Ø9 1/8″mounting depth 5 7/8″magnet Ø≈ 5 15/16″
Cutout diameter9 1/8″
Mounting depth5 7/8″
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