Welcome to the 5th Annual CSS SQ Challenge & Top 40 Money Round!

A Premier Car Audio Competition & Mobile Electronics Showcase

About the CSS SQ Challenge

Join Us June 28/29, 2025 for the Ultimate Car Audio Competition and Mobile Electronics Event!!

At Cincy Security & Sound, SQ means Sound Quality – with Emphasis on Quality. We’ll be showcasing the Best in Car Audio & Exotic Cars! Over $25,000 in Prizes. Spectators also have a chance to win $2,500* towards a Custom System or Upgrade* So Click that Registration Button to Find Out More!

Learn More about CSS

Reviews

what people are saying about us

Full disclosure—My Dad helps with this show and when he’s all in, He’s All In! The 2024 CSS SQ Challenge was Unforgettable. The 5th Annual will be even Bigger and Better. You’ll be surrounded by Sick installs, Great sounding vehicles, and Passionate People all Weekend!

Jared C. Knight

Cincinnati, OH

With over 20 years in the Car Audio Community as an Installer, Competitor, Judge, and World Champion…It’s Great to be a part of the CSS show in Ohio. The Best of the Best come together here! You don’t want to miss this show!

Motouse Muhammad

Milwaukee, WI

Had a great time at CSS 24’ The environment was great with friendly competitors and spectators. I really enjoyed the location and the shop owner, Cody was an awesome host!

Austin McCarter

Knoxville, TN

I’ve been a Professional Sound Engineer 20+ years and just as much competing in Sound Quality events. SQ is where it’s at and CSS is Where You Want To Be.

Brian Gill

Nashville, TN

Car Audio Head Units!

Pioneer, JVC, as well as other Units to fit your budget.

Plug & Play Amplifiers!

Match DSP/Amplifiers for Most Vehicles.

Speakers and Accessories!

CSS has what you’re looking for or we can Get It!

CSS Highlights

Best of Show

Celebrating top competitors since 2021—awarded for sound quality, installation mastery, technical knowledge, and crowd engagement.

Meet the Winners

Photo & Video Archives

Browse our archive of electrifying event memories, exotic car features, and crowd-favorite sound systems.

Explore the Gallery

The Evolution of Car Audio

Learn how car audio tech has transformed over the years, right here at CSS.

View Event History

BEST OF SHOW

bEST OF SHOW

Join us at 9380 Union Cemetery Rd, Loveland, Ohio 45140 for the CSS 5th Annual SQ Challenge and Top 40 Money Round!

Experience an unforgettable showcase of high-quality sound and cutting-edge technology, featuring exotic cars and thrilling competitions. Come see, hear, and be part of the excitement!