Born from the frustrations of an extreme hobbyist turned professional installer, ResoNix was created to challenge the status quo of automotive sound treatment, and later, adding entire high-end sound system components to the mix. Through obsessive testing, engineering, and a genuine understanding of even the smallest of real-world installations, we develop and offer products that perform exactly as promised, and then some. Whether you're chasing silence, clarity, or a competition-grade sound system, ResoNix is your trusted partner in all things automotive sound.
Built on precision, focused on performance
Every ResoNix product is designed and manufactured with the highest standards and with professional insight. From Material selection to manufacturing processes and tolerances, we obsess over details to ensure that our products have the highest level of performance out of anything else on the market.
We specialize in acoustic treatment and high end car audio. Not just as a side offering, but as our core focus. With years of hands on experience in sound treatment and top-of-the-line car audio systems, we understand how to get you the best end result possible for your application.
We use third-party accredited labs to test, validate, and refine all of our ResoNix sound treatment products with data-backed accuracy. We refuse to reply on marketing fluff and we publish real data so you can make informed choices with confidence.
ResoNix started with those that want the best in mind, and we've never lost sight of that. We listen to feedback, support DIYers and professionals alike, and produce and distribute products that elevate the entire car audio and sound treatment community.
Hello, my name is Nick Apicella. I am the owner/operator of ResoNix Sound Solutions and Apicella Auto Sound. Apicella Auto Sound was my primary business where I specialized in high-end car audio installations but also handled automotive electronics, general custom automotive fabrication, PPF, and of course, automotive soundproofing. But, as of April 2023, I walked away to focus my efforts on ResoNix full time.
Part of executing a high-end car audio system is the sound treatment that goes into the car, ensuring nothing rattles or resonates. To our clients, this is a big deal. No one wants to spend five, sometimes six figures, on a high-end, sound quality focused sound system just for the car to rattle and make undesirable noises. These considerations mean that what products we use and how we use them is critical.
By the way, the name ResoNix comes from a play on the words and the idea of “nixing” resonance.
Our team
Hey everyone! Many of you may already know me. For those that don’t, my name is Nick and I am the founder and owner of ResoNix Sound Solutions. A little about me: I am an audiophile that gets most of my sonic perfection addiction fix in the car. Starting back in 2010, right before graduating high school, I became obsessed with car audio after hearing one of my best friends’ new sound system. This obsession very quickly evolved into the specific niche of high-end sound quality focused car audio. Anything that had to do with making a car audio sound system sound great, I wanted to know it inside and out, and be able to do it myself. Anything from installation and fabrication techniques, speaker location pros and cons, acoustic measurement software and techniques, DSP Tuning, OEM integration, and you guessed it.. sound treatment.
This obsession grew to an insane level where it consumed my life. I worked at a shop in Manhattan on and off over a couple of years during this time. Eventually, in 2017, I started my own company, Apicella Auto Sound, working out of my parents driveway doing sound quality based sound systems for those that were familiar with me from internet forums and groups.
Soon enough, I had my own shop and was becoming well known around the world for what I did, and was serving clients and building their cars after being shipped in from every corner of the US and everywhere in between.
Outside of car audio, I’m relatively simple. The only obsession that is more important to me than car audio is snowboarding, which I have been doing extensively since I was 6 years old back in the winter of 1998. As a kid I had dreams of being a professional snowboarder, but as my body started to not handle injuries well, I turned towards snowboarding videography and photography. In winters I worked for the local mountain as well as a short time Transworld Snowboard Magazine before their closure doing photo and video work. All of my photos for ResoNix are still shot on my trusty Sony A7Rii that I used for these jobs. The closure of Transworld Snowboard Magazine is actually what solidified my decision into going all in into the car audio industry and getting my own shop. Between snowboarding and car audio and operating ResoNix, you can most likely find me hanging out at home with my two sphynx cats, Gustavo and Peter, or occasionally blowing dust off the Xbox (now PC) playing Halo 3.
Originally a passionate car audio hobbyist, Carson joined ResoNix after connecting through a mutual friend. At just 24 years old, Carson has become one of the most recognized voices in the mobile audio space, with a growing TikTok and Instagram following. Whether you need technical support or want to check out his latest install projects, Carson brings both skill and enthusiasm to everything he does.
Jesha is the glue that keeps ResoNix running smoothly. Known for her attention to detail and unwavering support for both customers and the team, she ensures that every interaction reflects the ResoNix commitment to quality and care. Whether it's behind the scenes or on the front lines, Jesha makes sure every experience with ResoNix feels personal, because to us, they are.
One of my personal friends, Matt lead the launch of our first in-house warehouse, from planning the layout to setting up receiving, putaway, and inventory control. He built simple, clean processes so things have been running smooth since day one, and for any changes as ResoNix grows. Matt oversees order fulfillment, cycle counts, packaging standards, and returns, and he tracks daily KPIs to keep improving speed and reliability for our customers. If you have received a package from ResoNix since October of '25, Matt was the one that sent it to you.
Gustavo and Skinny Pete are my resident office mascots and daily work-from-home companions. Gus is laid-back, a little odd, and perfectly content lounging the day away. Peter, on the other hand, is high energy and constantly on the move, and is usually "talking" about something. Both are 3-year-old Sphynx cats who have traveled the country with me in my RV, spending months on the road during these past trips. They keep things entertaining around here, whether I need a break or not.
Trusted experts we proudly recommend
Owned by Matthew Kim, Audio in Reach specializes in 3D scanning and 3D printing custom automotive products tailored to each client's needs. If you want world-class fabrication without having to visit a shop, Audio in Reach delivers unbeatable quality — shipped right to you.
Sound Concept in Nanuet, NY is our local do all car audio shop in Rockland County. They handle everything from quick diagnostics and simple installs to full custom, high end builds, with clean fabrication and proper OEM integration. I, Nick, owner of ResoNix, handle all DSP tuning for their sound systems. If you want it done right, fast, and tidy, they are only minutes from us and who I recommend in our region.
Musicar Northwest, based in Portland, Oregon, is a dealer and partner that sets a high standard for custom car audio fabrication. They use ResoNix sound deadening in their in-house installs and in the Porsche 911 pre-assembled audio kits they sell. Their kits fit cleanly and perform at a high level, and their installs deliver quiet cabins, reliable wiring, and custom fabrication with factory-grade fit and finish.
Miguel at Waveform Tuning offers professional DSP tuning services and travels nationwide to deliver world-class sound optimization directly to your door. When only the best tuning will do, Miguel is your go-to expert.
RW Soundworks, based in Maine and run by Luke, focuses on clean, high-end installs with a minimalist but meticulous approach. He uses ResoNix products in every build and only takes on select projects to ensure top-level results. Nick and Luke go way back to the Halo 3 MLG days, reconnecting by chance years later through car audio.
SLA Acoustics is a one person shop in Houston, Texas run by Tam. He focuses on high end car audio and soundproofing installations, with proper OEM integration, DSP tuning, and clean fabrication. Tam handles every step himself, which keeps communication simple and results consistent. If you want a quiet cabin and a system that sounds right and measures right, SLA Acoustics is a smart pick.
Bluewater Hifi is also a one person shop, based out of the Toronto run by Julian. He focuses on high end car audio and soundproofing installations, with proper OEM integration, DSP tuning, and clean fabrication, and also specializes in home audio. Julian handles every step himself, which keeps communication simple and results consistent. If you want a quiet cabin and a system that sounds right and measures right in the Toronto region, Bluewater Hifi is our suggestion.
Every vehicle and goal set is different. Start with our sound deadening buyer’s guide to understand what each material does and where to use it. If you want a tailored plan, book our sound system design and installation consultation.
To help offset the cost, up to 40% of the consultation fee can be credited toward ResoNix product purchases made within 30 days.
Most people ask this because they are not sure what physically fits. Fitment varies by vehicle, trim, and where you plan to install it. Check available depth carefully and avoid interfering with moving parts, window tracks, airbags, and service access. As a general rule, choose the thickest that comfortably fits the space. See the product page for details.
We are building an ongoing fitment sheet from customer confirmations. If you can share what fit in your vehicle, please let us know to help others.
If an item is on backorder, the estimated restock date appears on its product page and is updated as we get new information.
Domestic orders that include a backordered item will ship in two parts: in‑stock items ship immediately, and the backordered items ship as soon as they arrive. For international orders, we currently ship when all items are in stock.
You will receive an order confirmation by email, then a tracking email once your order ships. If you need an update or anything looks off contact us with your order number.
We recommend high‑quality, proven DSPs matched to your system design and goals. If you want a custom recommendation, book our sound system design and installation consultation.
To help offset the cost, up to 40% of the consultation fee can be credited toward ResoNix product purchases made within 30 days.
Yes. Start with the sound deadening buyer’s guide for material selection and placement, and the sound deadening reference information & guide for deeper technical detail and best practices.
Please open every box and wrapper fully, since small items are sometimes packed inside larger kits for protection. If something still appears missing, reach out with your order number and what you are not seeing.
We will make it right. Contact us.
Yes, we ship worldwide. Available carrier options and rates are shown at checkout based on destination and weight. Transit times depend on the service you choose and customs processing. Express options are typically faster, while economy services take longer.
Full details are here: Returns and refunds policy.
If you need to cancel an order before it ships, contact us as soon as possible. If a return is needed, follow the instructions on that page so we can process it quickly.
Need further guidance or have questions? See below for more ways to get in contact and view resources.