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Sundown Audio | SKU: SW-UV218D4

Sundown Audio U-Series v.2 18" Subwoofer

$719.99

Shipping calculated at checkout.

Key features

Subwoofer size: 18.0 inches
RMS power per subwoofer: 2000 W
Voice-coil options: D2, D4
Mounting depth: 10"
Cutout diameter: 16.9"
Driver displacement: .26cu ft

Impedance

D4 D2

Description

Sundown Audio U-Series v.2 18" Subwoofer

The U-Series v.2 18" Subwoofer is an 18-inch car subwoofer driver for a separately designed bass enclosure. Sundown specifies 2,000 watts RMS power handling for this model. Choose the listed voice-coil option to suit the amplifier and final wired load.

D2 means dual 2-ohm voice coils; D4 means dual 4-ohm voice coils.

Manufacturer specifications

Xmax: 30mm
RMS Power: 2000 W
Peak Power: 4000 W
Displacement: .26cu ft
Mounting Depth: 10"
Outside Diameter: 18.63"
Cutout Diameter: 16.9"
Sealed Enclosure: 3.0cu ft
Ported Enclosure: 4.0cu ft
Recommended Port Tuning: 35hz
Recommended Port Area: 64sq in

Enclosure and installation planning

This listing is for the subwoofer driver. Use the manufacturer’s dimensions and enclosure recommendations when planning the installation; no vehicle-specific fitment is asserted. Confirm the mounting cutout, available depth, enclosure volume, and amplifier load before assembly.

Official specifications and installation information

Recommended Monoblock Amplifiers

Power-matched options for one subwoofer or one complete loaded enclosure. We aim to include same-brand choices when their ratings qualify.

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Suggestions use 75–125% of the subwoofer’s RMS rating at the wiring load shown. Check wiring, enclosure needs, electrical capacity and installation space. Set gain and filters correctly to avoid overpowering the subwoofer. Buying more than one subwoofer changes the match.