Fullerton's Trusted Audio & Security Shop

Hey Fullerton!
Ready to upgrade
your ride — or
protect what matters?

From punchy new stereos to smart security systems, we install it right the first time. Stop by 539 W Valencia Dr or give us a ring — we're here to help.

Call (714) 870-1941 Explore Our Services
539 W Valencia Dr, Fullerton
Mon–Sat: 10 AM – 7 PM
ramon20375@yahoo.com
What We Do

Services Built Around You

Whether you're turning your car into a mobile concert hall or keeping your home and business secure, we've got you covered.

Car Audio & Stereos

Single-DIN and double-DIN head units, subwoofers, amplifiers, and complete audio system builds — installed cleanly and tuned to sound great.

Security Systems

Alarm systems for vehicles, homes, and businesses. We design setups that fit your space and give you real peace of mind.

Backup Cameras

Rear-view and wide-angle cameras wired into your display. Park with confidence and drive safer every day.

Electronics Retail

Browse our showroom for quality audio gear, wiring kits, mounting hardware, and everything you need for a professional install at home or on the road.

Custom Installations

Got a tricky fit or a custom project in mind? We handle unusual mounts, tricky wiring runs, and one-of-a-kind builds with care.

Troubleshooting & Repairs

Audio acting up? Alarm going off for no reason? Bring it in and we'll diagnose the problem and get things running smoothly again.

Interior of KAR Stereos and Alarms showroom in Fullerton
Fullerton
Local & Trusted
About Us

Your Neighbors in Audio & Security

KAR Stereos and Alarms has been a part of the Fullerton community for years. We started with a simple idea: people deserve honest, quality work on their car audio and security systems — without the upsell or confusion.

Whether you're a first-time buyer or a seasoned car audio enthusiast, we take the time to understand what you're trying to achieve. That means recommending the right gear for your budget and installing it so it looks like it belonged there.

Expert Installation
Honest Advice
Quality Products
Fair Pricing
Why Choose Us

What Makes Us Different

We're not a chain store. We're a local shop that takes pride in doing things right — for every customer, every time.

Right Here in Fullerton

Walk in anytime during business hours. No appointments needed — we're on Valencia Dr and ready to help.

Work You Can Trust

Clean installs, secure wiring, and a final check before you drive away. We stand behind our craftsmanship.

Transparent Pricing

We explain what you're paying for before we start. No surprise charges, no pressure to upgrade.

Personal Attention

You'll talk to the same person from quote to completion. We remember our customers and their vehicles.

Get in Touch

Let's Talk About Your Project

Have a question or ready to schedule an install? Reach out however works best for you.

Visit Us

539 W Valencia Dr
Fullerton, CA 92832-2186

Call Us

(714) 870-1941

Mon–Sat, 10 AM – 7 PM

Send Us a Message

Fill out the form below and we'll get back to you as soon as possible.

Ready to Make It Happen?

Stop by the shop, give us a call, or send a message — we're here and happy to help.

(714) 870-1941 Send a Message
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