Car Audio

We carry top quality car audio brands and the latest mobile electronics technology solutions on the market. We can upgrade your car audio and/or car video system whether you’re looking for a basic upgrade to your factory system, or a full sound system builds – anything you could imagine we can make it happen. We stock the latest technologically advanced car video and audio systems including, stereo head units, CD players, speakers, subwoofers, amplifiers, video monitors, DVD players, and entertainment systems. Our focus is to provide you exceptional customer service and enhance your car audio system experience at competitive prices. We have premium selections of car audio equipment to choose from. Our Certified and Professional Team will help you decide on the best products, packages, and installation for the sound system that is right for you. At Stereo USA Plus®, you get the right products, the right service, and the right installations all at the best price. 


Car Stereo

Stereo USA Plus presents a full line of Car Audio and Car Video System products. Everything from car stereo dash kits, removal/installation, single-DIN, double-DIN configuration, wiring harnesses, antenna connectors, steering wheel button interfaces, and more. Purchasing a new receiver or head unit brings the better sound, the adventure of new highlights, and the satisfaction of encountering music such that is beyond the realm of imagination. We carry many features and options from Pioneer, Alpine, Kenwood, JVC, from basic Bluetooth MP3 CD player stereo to touch screen double-DIN in-dash units featuring Apple Carplay, Android Auto, watching movies while you’re on the road, and GPS navigation units.


The right products, the right service, and the right installations. All at the best price.

  • Single-DIN in-dash: bluetooth mp3 player aux usb
  • Double-DIN in-dash: touchscreen bluetooth aux usb apple carplay android auto hdmi maestro gps navigation
  • Apple Carplay & Android Auto

Vehicle GPS Navigation (hyperlink new page):- Looking for GPS navigation devices for your car? Our team of experts narrowed down the best GPS navigation devices on the market. We carry In-Dash GPS Navigation Systems & Receivers from Alpine, Pioneer, Kenwood, JVC, Sony & more. With GPS, GPS navigation units will keep you on track to your destination. We stock both portable GPS units and in-dash GPS units.

Marine Audio & Video

Looking to Design a complete marine sound system for your boat? Want to upgrade boat stereo as well?

We’re your best choice for a Marine audio shop in Covina. Sailing your boat with a great sound system is quite an enjoyable experience. We carry the best marine audio equipment from Marine Stereos, Speakers, Subwoofers, Amplifiers, and Audio Packages. Enhance your boat experience with quality with our top brands from JL Audio Marine and Rockford Fosgate Marine 


We can install a complete Marine Audio System and enrich your boating experience by ensuring consistency and the best value we have from JL Audio Marine and Rockford Fosgate Marine brands that can only increase the level of music enjoyment when you’re on holiday or enjoying time on the beach. 

Harley Bagger Audio

Want to enjoy great sound on your Harley Bagger motorcycle?

Nothing like enjoying the ultimate sound quality while you cruise down the highway to your next destination.

Our team is well knowledgable and experienced with motorcycle Audio and Stereo. We have a wide selection of audio stereo speakers & sound systems for all Harley Bagger bikes. Every Harley Bagger Audio System is installed thoroughly using top quality brands from Rockford Fosgate, Hertz audio, Audison, JL Audio, Focal, and more professional audio components to choose from. 


All our Harley audio systems are equipped with proper Bagger Audio kits, Plug and Play for a variety of Baggers: Electa Glide, Heritage Classic, Road King, Road Glide, Street Glide, Ultra Glide, CVO Street Glide, CVO Limited, CVO Road Glide, Tri-glide Ultra, CVO Tri Glide. Our packages focus on installation expertise and product solutions for the motorcycle audio niche market.

We can upgrade your Harley audio systems with high performing amplifiers, full-range speakers, tweeters, mid-range/mid-bass driver, processor, woofers, and equalizers that will astound you and your friends. we can customize your Harley bagger audio setup and also tune your audio to match your sound the way you want to using the latest technology tools and software program to tune and adjust the sound to your taste!

Looking to add more style to your bike at an affordable price? Come into our shop, send an email, or call in to bring your vision to reality with us today.

Bagger Audio and Stereo Upgrades!

Car Alarm & Security

We offer a full line of premium vehicle security and remote start from top brands on the market such as Viper, Compustar, and Drone Mobile. We specialize in adding these aftermarket features to vehicles and trucks. You can always trust us to get the best and the most reliable car alarms and remote starter installation services at our Covina location. 

Our services include car alarms, keyless entry, remote start, GPS vehicle tracking, and backup sensors. We provide a vast variety of options & merchandise for your vehicle using the latest cutting edge technology to make sure you are in control, providing long-range, comfortable ride anytime anywhere. In the case of protecting personal valuables, a car alarm is a cost-effective measure to protect your self and your possessions from theft. Installing an alarm increases the likelihood that your vehicle won’t be chosen if other, easier alternatives are available. 


From a 1-way keyless entry, lock unlock shock sensor to 2-way responder remote start alarm that you can control from your own smartphone anywhere at any time. All our Alarm Installation services come with a limited lifetime manufactures warranty. Speak to one of our car alarm and security specialists today and learn how simple and affordable these upgrades can be

We can also protect your vehicle by adding features including glass break detection, backup battery, flashing parking lights, power trunk release, smartphone integration, vehicle tilt sensor, remote start, and much more. 

Custom Fabrication

We are dedicated to creating an astounding audio experience. We can fabricate custom speaker enclosures, custom dashes, aftermarket lighting, and more.

We specialize in custom fabrication techniques making custom sealed, ported, or bandpass boxes for subwoofers to maximize speaker performance. Fiberglass enclosures are the perfect way to customize your sound system. Using fiberglass gives us the freedom to utilize small areas to mount subwoofers or add multiple speakers to a door panel. Built at a high degree of expertise, all our custom fabrication is done in house and design made specifically for your vehicle. These are hand made using the finest materials & installation techniques while keeping with the style/lines of your vehicle’s interior. Our skilled design team is dedicated to giving you the highest performance and dependability through outstanding system layout, design & functionality.



Visit Us for a Free Consultation

Our team can help deliver a personalized solution to just about any installation-related details you can imagine. tailored to fabricate something special for your vehicle’s installation. Call us at (626) 339-2044 to schedule a complimentary appointment where we can check out your vehicle and discuss your specific vision in detail.