Sundown Audio HZS-10 D4

10″ subwoofer · dual 4 Ω · 500 W RMS

Fs 44.5 HzQts 0.49Vas 0.68 ft³Xmax 0.47″

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 volume0.53 ft³ (15 L)
Qtc0.74
Fc67 Hz
F3 (−3 dB, no cabin gain)67 Hz
Example box (outside)12 3/16″ × 12 3/16″ × 10 1/4″
Open sealed box in designer

Ported

Net volume1.34 ft³ (38 L)
Tuning (Fb)38 Hz
Portslot 1 3/4 × 14 5/16″, 30 7/8″ long
Port velocity at 500 W58 ft/s
F3 (−3 dB, no cabin gain)35 Hz
Example box (outside)31 1/2″ × 15 3/4″ × 9 1/2″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs44.5 Hz
Qts0.49
Qes0.578
Qms3.32
Vas0.68 ft³
Re (one coil)3.43 Ω
Sd56.3 in²
Xmax0.47″
Vd26.6 in³ calc.
Mms124 g calc.
BL14.3 T·m calc.
EBP77 — sealed or ported calc.
Sensitivity, 1 W / 1 m86.7 dB calc.

General

Size10″
Voice coilsdual 4 Ω
RMS power500 W

Mounting dimensions

Ø10 5/16″cutout Ø9 3/16″mounting depth 3 7/8″magnet Ø6 1/8″
Cutout diameter9 3/16″
Mounting depth3 7/8″
Overall diameter10 5/16″
Magnet diameter6 1/8″

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: 56.3 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