Sundown Audio SA Classic 10 D4

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

Fs 36.6 HzQts 0.49Vas 0.38 ft³Xmax 0.75″

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 volume0.44 ft³ (12.5 L)
Qtc0.67
Fc50 Hz
F3 (−3 dB, no cabin gain)55 Hz
Example box (outside)12 5/8″ × 12 5/8″ × 8 3/8″
Open sealed box in designer

Ported

Net volume0.85 ft³ (24 L)
Tuning (Fb)31 Hz
Portround port Ø2 1/2″, 14 1/2″ long
Port velocity at 1,000 W314 ft/s
F3 (−3 dB, no cabin gain)28 Hz
Example box (outside)17 13/16″ × 15 3/4″ × 8 7/16″
Open ported box in designer
2030405060801001502006066727884HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs36.6 Hz
Qts0.49
Qes0.54
Qms5.3
Vas0.38 ft³
Re (one coil)3.54 Ω
Sd44.3 in²
Xmax0.75″
Vd33.1 in³ calc.
Mms205 g calc.
BL17.6 T·m calc.
EBP68 — sealed or ported calc.
Sensitivity, 1 W / 1 m81.9 dB calc.

General

Size10″
Voice coilsdual 4 Ω
RMS power1,000 W

Mounting dimensions

Ø10 1/2″cutout Ø9 1/4″mounting depth 6″magnet Ø7 3/8″
Cutout diameter9 1/4″
Mounting depth6″
Overall diameter10 1/2″
Magnet diameter7 3/8″

The spec sheet's Sd of 78.5 in² is the area of a 10″ circle, not the cone's radiating area — not used.

Cone area (Sd) calculated from Fs, Vas and Mms: 44.3 in².

“≈” 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 Sundown Audio 10″ models