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ResoNix Sound Deadening Materials Buyer's Guide

Not sure how much sound treatment you need or which ResoNix products to use? This buyers guide explains which areas of your vehicle are most important to treat and offers kit suggestions from Stage 1 to Stage 5. Learn how much CLD, foam, absorber, or barrier to use based on your goals, budget, and experience.

Sound Deadening Material Independent Testing Data

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.

Sound Deadening Reference Information Guide

This guide breaks down the four types of sound deadening materials: vibration dampers, decouplers, sound absorbers, and noise barriers. It explains what each one does, how it works, and when to use it. Whether you're quieting road noise or improving a high end car audio system, this article helps you make the right choices.

Sound Deadening Testing – How It All Works, Layers, Weight, & Coverage Comparisons

Not all sound deadeners are equal. This article explains how coverage and weight can’t match the efficiency of a properly engineered product, backed by independent testing that compares ResoNix against budget alternatives.

How To Reduce Road & Tire Noise With Wheel Well Sound Deadening Treatments

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.

How To: Sound Deadening Car Doors The Right Way

Properly sound deadening your car doors is one of the most important steps you can take to improve both your vehicle’s audio system and overall driving comfort. When done right, it eliminates panel resonance, cuts down on road and wind noise, and provides a solid foundation for your speakers to perform as intended. In this guide, we break down exactly how to do it the right way, including which materials to use, how to prepare and treat each surface, and common mistakes to avoid that can waste time and money. Whether you are looking for cleaner bass, better midrange clarity, or simply a quieter cabin, this step-by-step process ensures you get results that last.

Independent Subwoofer Testing Data

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.

DSP Tuning Tracks & Guide

This guide shares my car audio specific DSP tuning tracks playlist along with a streamlined tuning walk through, designed to help polish your DSP adjustments by combining measurement tools and listening. It is not a full tuning manual, so having a basic foundation in DSP tuning is recommended.

Porsche 911 GT3 – Sound Deadening For Maximum Noise Reduction & Minimum Weight Added

Discover how the ResoNix Porsche 911 Sound Deadening Kit transforms the driving experience by reducing rattles, tire noise, and exhaust drone without sacrificing the signature 911 character. This detailed installation log showcases the materials, methods, and results that bring clarity, comfort, and refinement to one of the world’s most iconic sports cars.

2023 Ford Bronco – Sound Deadening & Noise Reduction Installation

The Ford Bronco suffers badly from wind, road, and tire noise. Our ResoNix Ford Bronco Sound Deadening Kit fixes this by treating doors, floor, quarter panels, wheel wells, and hood with CLD, absorbers, and barriers. The result is a quieter cabin and a more refined driving experience without sacrificing off-road performance.

2022 Volvo S60 Sound System Upgrade & Sound Deadening Installation

A nearly invisible, OEM looking Volvo S60 system build. Helix P Six Ultimate and P One Mk2, Audiomobile Encore 12s in compact sealed chambers, and full ResoNix treatment in doors, rear deck, and trim. Digital signal via MOST150, tidy wiring, quick-disconnect serviceability, and a clean, removable trunk display.

Why Should You Choose ResoNix?

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.

What Is Sound Deadening

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...

What Sound Absorber Is Best To Use In Your Car

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...

Sound Treatment Terminology & Glossary

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.

Blackhole Tiles or ResoNix Guardian - Which Sound Absorber To Use Inside Of Your Car Door

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...

ResoNix Competitor Spotlight From 2024 US Car Audio Finals - Miguel Rios of Waveform Tuning

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...

Helix DSP Software Tech Tip: Differential Rear Fill & Using Real Center

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...

Helix DSP Software Setup, Part 1: Initial Setup and Inputs

Tech Tip: Helix DSP Software Setup, Pt.1: Initial Setup & Inputs/Outputs This is going to be our first post going over your Audiotec Fischer Helix, Brax, or Match DSP product. For this first video, we are focusing on the initial Helix DSP software setup and configuring the inputs and outputs. 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.  Inputs and Output Menu: This will the first menu you have to set up in your Audiotec Fischer Helix, Brax, or Match DSP. It is also one of the most confusing for new users. In this video we go over how to use it, its capabilities, and...

Helix DSP Software Setup, Part 2: Input EQ, Summing, Automatic Time Measurement, Tune EQ

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,...

How To Use WinISD To Model, Simulate, & Compare Loudspeakers

Tech Tip: How To Use Winisd To Model, Simulate, & Compare Loudspeakers What Is Speaker Modeling Software? What is WinISD?         WinISD is a free software program designed for speaker design and optimization. The software allows users to create and simulate different speaker and subwoofer enclosure designs, and analyze their acoustic performance.        WinISD provides a variety of tools and features to help users create optimized speaker designs. For example, users can input the parameters of their chosen driver, such as the Thiele-Small parameters, and the software will calculate the optimal box size and port tuning frequency based on the selected design.        The software also includes graphical analysis tools, which allow users to...

How To Measure Phase Cohesion Through A Crossover Using Room EQ Wizard RTA, A Microphone, & All Pass Filters

How To Measure & Verify Phase Cohesion Through A Crossover Using An RTA Hey everyone, I'm starting a blog to share various tech tips and useful information. For my first post, I decided to make an old video of mine available again. In this video, I demonstrate how to measure phase quickly and easily verify phase for maximum cohesion through a crossover. This is done using nothing but an RTA, All Pass Filters, and the Phase Slider on my Helix DSP. Additionally, I measure the results with Room EQ Wizard and a USB Measurement Microphone. Although I used a Helix DSP for this demonstration, it's an older video, so some things may look a bit different. Furthermore, the video includes my old company's...