Sundown Audio Ev6-8 D2

8″ subwoofer · dual 2 Ω · 400 W RMS

Fs 46.2 HzQts 0.51Vas 0.21 ft³Xmax 0.55″

Recommended box

For a sedan, one sub, 400 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 volume0.28 ft³ (8 L)
Qtc0.68
Fc61 Hz
F3 (−3 dB, no cabin gain)66 Hz
Example box (outside)10 1/4″ × 10 1/4″ × 8 1/2″
Open sealed box in designer

Ported

Net volume0.60 ft³ (17 L)
Tuning (Fb)43 Hz
Portround port Ø2 1/2″, 10 3/16″ long
Port velocity at 400 W207 ft/s
F3 (−3 dB, no cabin gain)37 Hz
Example box (outside)14 11/16″ × 15 3/4″ × 7 1/2″
Open ported box in designer
203040506080100150200606672788490HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs46.2 Hz
Qts0.51
Qes0.562
Qms6.15
Vas0.21 ft³
Re (one coil)2.01 Ω
Sd30.7 in²
Xmax0.55″
Vd16.9 in³ calc.
Mms112 g calc.
BL10.8 T·m calc.
EBP82 — sealed or ported calc.
Sensitivity, 1 W / 1 m82.2 dB calc.

General

Size8″
Voice coilsdual 2 Ω
RMS power400 W

Mounting dimensions

Ø8 1/2″cutout Ø7 1/4″mounting depth 4 15/16″magnet Ø6 3/8″
Cutout diameter7 1/4″
Mounting depth4 15/16″
Overall diameter8 1/2″
Magnet diameter6 3/8″

The spec sheet's Sd of 53.4 in² is the area of a 8″ circle, not the cone's radiating area — not used.

Cone area (Sd) calculated from Fs, Vas and Mms: 30.7 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 8″ models