High-end audio system upgrades with DSP tuning, custom speaker mounts, and sound deadening for superior sound quality.
Installation of premium radar and laser defense systems like Radenso for enhanced vehicle safety and performance.
Custom camera setups with machined brackets and clean integration for improved visibility and security.
Professional application of sound damping materials to reduce road noise and enhance audio clarity.
Immaculate wiring jobs, custom subwoofer enclosures, and 3D-printed brackets for seamless, factory-like installations.
Installation of accessories like throttle controllers, LED lighting, and performance dampers with expert integration.

Premium Car Audio & Electronics Installation Experts in Bellevue
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Systems Unlimited is a premier automotive electronics and audio installation specialist in Bellevue, WA, dedicated to transforming vehicles with high-end custom solutions. We specialize in car audio upgrades, sound deadening, radar-laser systems, and camera installations, using top brands like Audison, Arc Audio, and Morel. Our team, led by Charles, provides meticulous craftsmanship, DSP tuning, and custom fabrication for luxury and performance cars, ensuring factory-like finishes and exceptional sound quality. Serving the Greater Seattle area, we offer personalized consultations and transparent service for enthusiasts seeking unparalleled automotive enhancements.
Just had a camera system installed in our Lexus GX 460. The care and attention to detail for the install was evident right from the start. Using machined brackets created there at Systems Unlimited instead of what comes in the package is a real game changer. Jorge is a real artist and it shows in his install. Last, Charles at the front of the house was able to outline a clear path and use of products to create a great system. I know not the full audio installs these guys are known for, but the same great service on a camera system... If you want it done right and with quality, look to these guys for your auto installs...
System Unlimited in the Greater Seattle Area absolutely transformed my Cayenne MY23's audio! My first car audio upgrade, using an Audison Prima FORZA 1200W amp, is a mind-blowing experience. From the initial consultation to the final sound optimization (including door sound deadening, custom cabling with 3D-printed brackets, and DSP tuning), their professionalism was top-notch. The difference from the stock system is incredible, far surpassing even the Bose system. I'm already considering adding a subwoofer, thanks to the amplifier's capabilities! I can't wait to work with them again!
This is the only place I will allow to touch my vehicle. Systems Unlimited provided one of the best customer experiences I have ever had. Charles and his team offered full transparency through the entire process. I was able to see the wiring and thought process behind every decision in real time. (I have never seen a cleaner wiring job). I did a full Audison system, I have had plenty of audio systems that I considered high end. Boy was I wrong. The combination sound deadening, audison speakers and amp with DSP as well as custom box with 5” subs has proven to be a perfect system. My 992 Targa now has a symphony in it at all times. When I received the car back there was zero traces that everything had been replaced (other then the sub box that somehow looks factory Porsche). They somehow tucked a sub box in a spot that sits beneath the Targa top when folded down. Also custom printed mounts for door speakers and wiring. Crazy stuff happening in that shop. I can’t imagine a job they couldn’t handle. I wish I found these guys sooner.
I had two Escort radar-laser systems as well as a high end Audio installed at another shop. I contacted Systems Unlimited to up grade my radar-laser system to a Radenso Ultimate Edition. While my 2014 Porsche 911 Carrera S Cabriolet was in the shop, I experienced a sound system in another 911 they had done and chose to upgrade my audio system as well! For those seeking over the top Craft and Workmanship on custom car stereo and radar-laser defense. Systems Unlimited is the Best! From disassembly to install every nut, bolt, screw, was put in place and the work looks like it was Factory installed. You would not know the upgraded system until you Hear, Feel, and Experience it for yourself. It is AWSOME! The Professional Custom Installers and owner Charles are hands on from beginning to the end of project. No project is too big or small and he will work with your price point. Charles will follow up to make sure your custom install is working without issues. A Very Satisfied Customer!
I purchased a 2021 RAV4 Prime in July and I wanted to get it sound damped to make the ride a little quieter. I called and spoke with Charles. He invited me down to the shop to see the type of sound damping they offer. Charles was very accommodating and before I left, I took a listen to the sound system in his car. It had been a few cars since I had a custom system (Zapco) and decided to go ahead and upgrade the audio at the same time. The original plan was to keep my existing drivers, replace the factory JBL amp with an Arc Audio 8-channel DSP amp and a second amp for the subwoofer. He also wanted to find a way to re-enforce the JBL sub enclosure, which is plastic. At some point he asked if we could replace the spare tire with a custom subwoofer enclosure and then we could use a larger sub and / or two subs, which we ended up doing. The one issue I was stuck on is that we would only have 8-channels of DSP, so the rear fill would be mono and we could not time align them individually. I up-sold myself on using two Arc Audio 1000-watt DSP amps. A 6-channel DSP for the front speakers (Door, Dash and A-Pillar) and a 4-channel DSP amp for the rear fill and then bridge the other two channels for the dual subs. Given the new power from the larger amps, Charles upgraded all of the stock drivers with new ones from Morel because the factory could not handle the power. In fact, the factory Amp/Sub limits the sub output, which the new system is not limited by. While I was visiting family, Charles arranged for Brian Mitchel, from Arc Audio, to re-calibrate my sound system. Brian wins a lot of the audio competitions and he calibrated my vehicle like his competition vehicle and I could not be happier with the results. While my Prime was being worked on, I found other upgrades I wanted to do and imported some parts from Japan, including TRD Performance Dampers, TRD Door Stabilizers, a Strut Tower Bar, LED lighting, etc… I asked Charles if he could have his team install all of this and bill me and he was very accommodating. I am planning to go back to Systems Unlimited later this year to have some more work done, their attention to detail is second to none. It was not cheap, but I feel this is a case of you get what you pay for. They do immaculate work and I could not be happier with the results! Went back for some additional work in September of 2020. Wanted a custom cargo floor to show off the amps and to vent the heat from that area. Also had a throttle controller and Scan Gauge III I wanted installed with a custom faceplate. Photos attached. As usual, excellent work that is second to none.
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