Morel Ultimo 802 (SVC 2 ohm)

8″ subwoofer · 2 Ω · 800 W RMS

Fs 37 HzQts 0.40Vas 0.60 ft³Xmax 0.49″

Recommended box

For a sedan, one sub, 800 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 volume0.35 ft³ (10 L)
Qtc0.66
Fc61 Hz
F3 (−3 dB, no cabin gain)69 Hz
Example box (outside)11″ × 11″ × 8 11/16″
Open sealed box in designer

Ported

Net volume0.71 ft³ (20 L)
Tuning (Fb)37 Hz
Portround port Ø2 1/2″, 11 15/16″ long
Port velocity at 800 W225 ft/s
F3 (−3 dB, no cabin gain)36 Hz
Example box (outside)18″ × 15 3/4″ × 7 5/16″
Open ported box in designer
2030405060801001502006066727884HzdB
Sealed Ported · SPL in dB at 1 W / 1 m, no cabin gain

Thiele/Small parameters

Fs37 Hz
Qts0.40
Qes0.59
Qms1.26
Vas0.60 ft³
Re1.7 Ω
Sd37.7 in²
Xmax0.49″
Vd18.5 in³ calc.
Mms91 g calc.
BL7.8 T·m calc.
EBP63 — sealed or ported calc.
Sensitivity, 1 W / 1 m83.6 dB calc.

General

Size8″
Voice coils2 Ω
RMS power800 W

Mounting dimensions

Ø8 3/4″cutout Ø7 7/8″mounting depth 4 3/4″magnet Ø≈ 5 1/8″
Cutout diameter7 7/8″
Mounting depth4 3/4″
Overall diameter8 3/4″

“≈” 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 Morel 8″ models