Mobile Electronics› Video Accessories

Sundown Audio

U SERIES 6.5IN D4 (400WATTS) SUBWOOFER

$199.99

SKU: S0FJ SW-UV16.5D4

In Stock
In Stock
Ships by Jun 14
Free Shipping
Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Beginner — under 30 min

Description

The Sundown Audio SW-UV16.5D4 is a 6.5-inch subwoofer designed for powerful audio performance. It features dual 4-ohm voice coils and a robust construction, including a heavy-duty cast basket and double-stitched surround.

This subwoofer is optimized for small ported enclosures and boasts a 1.75-inch aluminum voice coil former for enhanced heat dissipation. It handles 500 Watts RMS and 1000 Watts Peak power.

Fitment

Fitment Guaranteed

Don’t gamble
on fit.

Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

Available on iOS & Android

Specifications

BrandSundown Audio
Part NumberS0FJ SW-UV16.5D4

Buy with Confidence

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

View Full Return Policy