BuildsMembersVideosForums
Teams
Browse teams
Events
Car shows & meets
Competitions
SPL & SQ leagues
Contest
Win prizes!
Equipment
Browse audio gear
Installation Shops
Find professional installers
Equipment Brands
Explore top brands
Retailers
Find dealers & stores
Creators
YouTubers & reviewers
Calculators & Tools
Box, impedance, wire & more
Login

Get updates on builds, events & deals

Get updates on builds, events & deals

COMMUNITY
  • Browse Builds
  • Members
  • Groups
  • Teams
  • Competitions
  • Events
  • Promoters
  • Video Galleries
  • Brands
  • Retailers
  • Equipment Database
  • Submit Your Build
TOOLS
  • Box Calculator
  • Impedance Calculator
  • Wire Gauge Calculator
  • Amplifier Matching
  • Cone Area Calculator
  • dB Power Calculator
  • Ohm's Law Calculator
  • Power Calculator
  • Lithium Battery Calculator
  • Strapped vs Gain Matched
SUPPORT
  • Installation Guides
  • Warranty Info
  • Contact Us
  • Dealer Locator
COMPANY
  • Sparked Innovations Store
  • About Us
  • Eddie's Blog
  • Privacy Policy
  • Terms of Service
  • Data Policy & Ethics
  • Data Deletion
  • Changelog
FOR BUSINESS
  • Partner With Us
  • Become a Retailer
  • List Your Shop

Product data aggregated from publicly available retailer listings

Sonic ElectronixWoofers EtcSky High Car AudioDown4Sound ShopBig Jeff AudioCar Audio BargainShowtime Electronics+ more
Loading...

© 2026 Sparked Innovations. All rights reserved.

POWERED BY SPARKED INNOVATIONS
v1.00|Beta|Live
Home/Compare/R2-W8D4 vs U-Series 6.5" v.1 Subwoofer
All Comparisons
R2-W8D4

R2-W8D4

Alpine
$339.90
View Product
VS
U-Series 6.5" v.1 Subwoofer

U-Series 6.5" v.1 Subwoofer

Sundown Audio
$159.99
View Product

Subwoofer Spec Showdown

4 specs compared
Spec
R2-W8D4
U-Series 6.5" v.1 Subwoofer
Option1
—
D4
Previous Price
—
199.99
Price Updated At
—
2026-01-10T01:42:13.897Z
Shopify Variant Id
—
45747957301558