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Wheel wells let in some of the most annoying road noise, from tire roar to impact and debris. Treating them with ResoNix CLD Squares, Fiber Mat, and optional Barrier can significantly reduce these sounds and keep them from reaching the cabin. The result is a quieter ride, less fatigue, and a more refined driving experience.

New to sound treatment and need to clear up the jargon? This glossary demystifies common terms related to automotive sound deadening, from absorbers and decouplers to noise barriers. It’s always getting expanded, and if you spot something missing or confusing, we’re all ears.

Wondering which sound deadening actually delivers? This page shares independent test results that show how ResoNix CLD Squares and Mega CLD Squares outperform almost every other product in resonance reduction and price‑for‑performance. See the cold, hard data so you can compare brands with confidence.

In a world driven by instant gratification and cheap convenience, ResoNix stands apart for those who demand more than 'good enough'—offering true performance, lasting value, and the highest quality in sound deadening, and other high-end car audio products.

Here, you’ll find the most detailed, objective, and continuously growing collection of objective car audio subwoofer Klippel measurements available to the public. No marketing fluff. No cherry-picked specs. Just raw, usable data, collected by a third-party loudspeaker engineering firm that is fully trained on Klippel systems and focused on proper testing, not brand loyalty.

Miguel Rios of Waveform Tuning, A Travelling Car Audio DSP Tuning Service Demo Car: Grey, the Mazda CX-50        In mid-October of 2024, I made my way to Birmingham, Alabama for the unified Car Audio US Finals for MASQ, EMMA, IASCA, & MECA. Here, I found Miguel Rios, who offers a car audio DSP Tuning service where he travels to you. This service is perfect for those that do not have anyone capable local to them. I can with full confidence say that Miguel is one of the best in the country and give him my proverbial stamp of approval.        In this video, we go over his entire install in his vehicle, and talk about installation...

What Sound Absorber Is Best To Reduce Noise In Your Car        In the world of cars and cruising, there's a hot topic making the rounds: "What is the best sound absorber for cars?" It's like the secret sauce for turning your vehicle into a peaceful haven. You see, we often get caught up in the horsepower, banging tunes, and plush seats, but there's one unsung hero we tend to forget – sound absorbers. These unsung champs have a knack for hushing up the noise inside your ride, making it comfier and quieter. So, hop in as we take a spin through the realm of sound absorbers and figure out which ones are the absolute best for your...

Blackhole Tiles or ResoNix Guardian Which door cavity rear-wave sound absorber is right for you?      Blackhole Tiles or ResoNix Guardian. Which sound absorber is best for your car doors, and why? Well, first we need to discuss what they are, and why it is important to have a sound absorber inside your door cavity, especially in car audio installations that feature a door-mounted midbass driver.        You can read about sound absorbers and noise barriers and composites that are comprised of the two, and how they work in our Reference Information & Guide article. A quick summary, sound absorbers made out of fibrous materials absorb sound by deforming randomly at a microscopic level as sound passes...

How To Reduce Sound In Your Car By Sound Deadening Your Wheel Wells An excerpt that was originally from our Reference Information & Guide page   Sound proofing Your Wheel Wells With ResoNix Sound Deadener & Sound Absorber Added 11/13/2022 Supplies needed    . ResoNix CLD Squares    . ResoNix Fiber Mat 0.5" and/or 1.0" (depends on how much space you have and what you can fit)    . Optional and preferred: ResoNix Barrier         Note: ResoNix Fiber Mat is perfectly fine in this location and exposed to the elements. It will not hold water, it will not degrade, it will not grow mold or mildew. This is the very same material that is used in these locations...

Tech Tip: Helix DSP Software Tech Tip - Setting Up Differential Rear Fill & Using Real Center Helix DSP Differential Rear Fill is a commonly sought-after rear speaker setup for car audio hobbyists using any of the Audiotec Ficher DSP's. It is used for its ability to help "enhance" the front speakers by simulating the late reflections of a larger room. Implemented correctly, this can result in a sound system that feels larger than the boundaries of the vehicle. How it works is simple. It is a Left minus Right/Right minus Left signal. This L-R/R-L signal is a sum of left and right, but the reversal of polarity of one side results in the cancellation of all of the correlated...

What Is Sound Deadening?    Sound deadening in cars is a process that involves the use of materials to absorb or dampen sound waves and vibration. This process can be applied to various parts of a car, including the doors, roof, trunk, and floor. The goal is to reduce noise and vibration that can be distracting, uncomfortable, or even harmful to your hearing. It is also used by many to improve the sound system in their vehicle.        There are a handful of main types of sound deadening materials for cars. Constrained Layer Dampers (commonly referred to as Sound Deadener) are by far the most common and widely known. There are also Sound Absorbers, Decouplers, and Barriers. Constrained...

Tech Tip: Helix DSP Software Setup, Part 2: Input EQ, Summing, Automatic Time Measurement, Tune EQ        This is our second post going over the Audiotec Fischer Helix, Brax, or Match DSP software. For this second video, we are focusing on the  Helix DSP software Setup, Input EQ, summing, Automotive Time, Measurement Tune EQ, and more! Please note that the software used is the V5.00.05, so some things may change as they update the software, which they regularly do.  Helix DSP Input EQ - The input EQ on the Audiotec Fischer DSP PC Tool software is the most powerful available. In this software version, it features up to 5 bands of parametric, shelf, and all pass filter equalization,...