There is nothing worse than turning up your music only to hear your car speakers or subwoofers rattle and buzz because they are damaged. Well, there is something worse: You could turn up the volume and hear nothing at all. We hear stories about people damaging their car speakers all the time. In almost every case, the issue is over-powering them because of unwise adjustments to the sound system. In this tongue-in-cheek article, we’ll discuss the five fastest ways to blow your car speakers. Let’s be clear: We don’t want you to damage your speakers and, more importantly, your hearing. The reality is, this is a list of five things NOT to do to your car stereo system. We hope you enjoy!

1. Turn Up the Gains on Your Amps

When a mobile electronics specialist installs an amplifier in your vehicle, the gain control (also called the sensitivity control) should be adjusted so that the amp will produce its maximum power when the volume on the source unit is turned up all the way. Some installers provide a little extra range on the volume so that quiet recordings can still play loudly. This is called gain overlap.

The amount of power your amplifier produces is fixed. That is to say, no amount of knob-turning, button-pushing or amp-gain-tweaking will allow it to produce more power. Turning up the gains on your amp only causes the amp to produce full power with a lower input voltage from your source unit. There is no benefit to this, and depending on your system, could introduce more background noise.

If you think your system doesn’t play loudly enough or seems to get too loud with only a little turn of the volume, go back to your installer and have him or her check the settings on the amp while playing the music you enjoy.

2. Crank the Bass Boost!

Perhaps the most dangerous control on an amplifier, besides an improperly set gain control, is the bass boost control. In all cases, this single-band equalizer increases the output of the amplifier around a specific range of frequencies — usually in the 40 to 50 Hz region. What the control doesn’t do is increase the maximum available power from your amp. If your audio system is configured to produce full power with the volume on your radio turned up all the way, turning up the bass boost on an amp or processor will cause the amp to distort at the frequencies that you have boosted. It won’t make the system play any louder.

If you turn the bass boost up 10dB, then you need to turn the gain control by an effective 10dB to keep everything equal. Perhaps it’s easier to leave it alone?

3. Wire the Amplifier To Below-Spec Impedance

If you have multiple subwoofers with dual voice coil designs, a variety of options are available to wire them to your amp. The voice coils can be wired in series, in a series-parallel configuration or all in parallel. The maximum amount of power an amplifier produces is dependent on the voltage and current provided by the amp. Lower load impedances will typically cause an amp to produce more current and consequently more power. With that said, there is a limit. All amplifiers have a minimum load impedance rating. This means the manufacturer has designed the amp for a specific current limit that won’t over-tax the power supply transformer and the power supply and output switching devices.

Changing the way your subs are wired to something that is beyond the specification of your amplifier may allow it to produce a little more power, but in the case of most amplifiers, all it does it make the amp run much hotter because the efficiency is reduced. If your amp was producing 1,000 watts and rewiring it made an extra 50 or even 100 watts, well, that difference is almost inaudible.

4. Adjust the Tone Controls or EQ on Your Radio

If your radio has an equalizer or simple bass and treble controls, turning them up will make different frequencies of your music louder relative to others. With that said, it won’t make a properly configured and tuned audio system play any louder. Just like the bass boost on an amp, equalizers and tone controls affect the signal level at specific frequencies.

Another common problem with adjusting equalizer controls in a source unit is the ease of distorting the output signal. The preamp signals from radios are rated for a specific amount of voltage, usually 2, 4 or 5 volts RMS. Turning up the tone controls on the deck could cause the signal coming from the radio to distort and make your music sound horrible.

5. Buy the Wrong Amplifier

All speakers and subwoofers have power ratings. In almost all cases, this rating is the amount of power that the speaker can manage from a thermal standpoint. You see, speakers are notoriously inefficient. More than 95 percent of the energy fed into a speaker is converted to heat. If you feed a woofer 100 watts of power, 95 watts go into heating the voice coil and motor assembly and less than 5 watts are converted into acoustic energy.

If you buy an amplifier that produces more power than a speaker or subwoofer is rated to handle, you will overheat the voice coil assembly, and it will fail.

At the opposite end of the spectrum, having too little power can also cause problems. Let’s say you have a coaxial speaker rated for 70 watts of power and you are using an amplifier rated for 50 watts. You’d think that you are pretty safe, right? If you push that amplifier to the point that its output signal reaches clipping, the amp will produce a great deal more high-frequency energy. The additional energy can cause the tweeter to heat up and possibly fail.

Another consideration about amplifiers is that most can produce 150 percent to 200 percent of their rated power as extra energy when pushed into clipping or distortion. So, a 50-watt amplifier can easily produce 75 watts of distorted power and still damage that 70-watt speaker.

Make sure you have enough power to enjoy your music at the listening levels you want without having to push an amp to the point of distortion.

If you have any questions about purchasing the right products for your mobile audio system, visit your local mobile electronics specialist retailer. They will ensure you get the right solutions that are configured so your car audio system sounds great and will last for years.

This article is written and produced by the team at www.BestCarAudio.com. Reproduction or use of any kind is prohibited without the express written permission of 1sixty8 media.

Shopping for car audio upgrades is as personal as shopping for a new car or new shoes. Each of us likes something different, has a different budget and different performance and style preferences. In the case of a new car, your options range from a solid and reliable daily driver in the $14,000 range to luxury and exotic vehicles costing well over $100,000. When it comes to a new radio, speakers, an amplifier or a subwoofer upgrade for your car, the price point differs just as much, as do the features and performance levels. In this article, we will provide some tips to prepare yourself to buy new car audio upgrades and ensure they are installed and configured reliably.

Shopping Online or at a Store

A discussion about online shopping opens a monumental can of worms. One of the biggest differences between buying from an online retailer and a local independent specialist will be the level of after-sales service and support. If you buy new speakers online and you have a problem with them, you can try contacting the supplier. About all they can do is offer to let you send the speakers back (at your cost) and they will send you another set. When you deal with a local retailer, someone can go to your car and listen to the problem. The issue may not be the speakers at all. It could be the source unit, an amplifier or an installation issue. Likewise, if you buy something online and it doesn’t fit your vehicle, you will have to send it back (again, at your expense). If you buy speakers from a local shop, they can make sure you get the right size and that the units they install function perfectly.

Do-It-Yourself Installations

Make no doubt, most of the installers, technicians and fabricators who work at mobile electronics retailers got their start working on their vehicles in their driveway. In some cases, this passion for working on cars and trucks grew to include their friends’ vehicles, while others sought out training from companies like Installer Institute, Kingpin University, Mobile Solutions, or in the good old days, Mobile Dynamics. Whether an installer had formal training or extensive hands-on experience, most of them have continued to hone their skills and knowledge through ongoing training to deal with data network integration, handle factory audio systems with advanced tuning and learn about new cool and unique fabrication skills.

Whether you decide to pay for the expertise of a professional or attempt to install something yourself comes down to your comfort level. If you feel you can do the work safely and reliably, then, by all means, give it a try. If you don’t know how to access and confirm the correct wire connections, make electrical connections securely and safely and mount equipment in a way that ensures maximum performance and reliability, then ask your local shop to do the work. Don’t get in over your head, though; it’s easy to break plastic trim panels or short wires and damage electronic modules.

Preparing to Go Shopping

When it’s time to head out and shop for new audio equipment for your vehicle, you’ll need to bring a few items with you and do a little planning. First, you need to decide on a budget. How much money do you want to spend on the product? Set yourself two levels for this decision: an ideal price and an absolute maximum price. What if you’ve allowed $800 for a set of speakers, but you hear a set priced at $1,000 that sounds amazing? Leave yourself some wiggle room.

Set a budget for accessories as well. Here are some common accessories required for some of the major audio system upgrades:

Source Unit

• Mounting Kit
• Wire Harness Adapter
• Antenna Adapter
• Vehicle Integration Module *

Speakers

• Mounting Adapter
• Speaker Wire
• Sound Deadening
• Acoustic Coupling Rings

Subwoofer

• Subwoofer Enclosure
• Speaker Wire
• Mounting Screw/Hardware

Amplifier

• Power Wire
• Fuse Holder
• Interconnect Cables
• Remote Turn-On Wire
• Vehicle Integration Module *

 

*Many new vehicles use data connections between the factory radio and amplifier. To upgrade either of these components, you may need to purchase a data interface module. These modules need to programmed for the specific make, model and trim level of your vehicle to function properly.

Choosing a New Source Unit

When it comes to source unit upgrades, the first thing you need to find out is whether or not you can replace the factory radio in the vehicle at all. Vehicles such as BMW, Mercedes-Benz, Mazda and many new Nissan vehicles have source units that can’t be removed.

Once you have determined that you can replace the radio, you need to determine the features you want to add. These will depend on how old your vehicle is. Many new radios include Bluetooth for hands-free calling and audio streaming, HD Radio tuners and playback of MP3, WMA, AAC, WAC and FLAC digital audio files. If you choose a multimedia radio, the system may also play MPG, AVI and MKV video files, and it may include an input for a backup camera. Navigation is a very popular feature on multimedia radios, as is smartphone integration. Features like Android Auto and Apple CarPlay have been the most popular reason people upgrade their radios over the last few years.

Speaker Upgrades

Perhaps the most important component in an audio system is the speakers. Speakers are the only link between your music source (radio, USB stick, streaming service or smartphone) and your ears. The quality of your speakers will determine the accuracy of your audio system. A speaker that produces a lot of distortion will color your music, detracting from the detail and realism of the listening experience.

Auditioning speakers can be difficult, especially in an environment other than a car. What you can tell is the difference between one speaker and another. Listen for clarity and detail rather than overall tonal balance. Does a brush on a cymbal sound real or like sandpaper on a piece of steel? Do the highs blend realistically with the midrange and midbass region? Is the bass taut with great impact or sloppy and resonant? The differences you hear on a display board will remain consistent once the speakers are installed in your vehicle, even if the overall tonal balance changes.

Amplifiers and Processors

Choosing one amplifier over another can be difficult. Most people buy amplifiers based on power ratings. You don’t need a 400-watts-per-channel amp for your midrange drivers; 50 to 100 watts is usually quite adequate. For subwoofers, well, power is fun. Too much power can lead to damaging your speakers. If you never, ever want to damage a speaker, choose an amp rated for half of the continuous power rating of your speakers and subs. If you can control yourself and know when to turn down the volume if you hear distortion, you can choose an amp that offers the same power as the speaker is rated for. Use only the continuous power ratings on your speakers, not those bogus “max power” numbers.

Signal processing has become a lot more important and readily available in the last few years. As more and more shops learn how to quickly and efficiently tune an audio system using a DSP, consumers continue to reap the benefits of improved accuracy and realism from their sound system. If your budget can handle it, include a digital signal processor in your upgrade and make sure the system is designed to maximize the features offered by that unit.

What to Bring With You

When you go shopping, bring one or two pieces of music that you know well. Before you leave your house, listen to that song on as many different sources as possible: your home theatre system, a portable Bluetooth speaker, headphones with your smartphone and your existing stereo. Think about what is different between each experience so you can listen for those elements as you audition new products.

It will sound strange, but bring the vehicle you want to upgrade with you. Don’t bring your wife’s car. Many shops will want to look at your vehicle to confirm speaker sizes and the available space for equipment installation, and some salespeople will want to sit in the car with you to learn more about how you listen to your music. Seeing EQ or tone control adjustments you have made can provide a great deal of insight into future upgrades.

Choosing the Right Retailer

Not every car stereo shop is ideal for every type of project. Needing a new radio in a 1990 Honda Civic does not require the same skill as fabricating a set of speaker pods for in the A-pillars of a Tesla Model 3. Part of your shopping process is to quantify the skills and capabilities of the shop to find out whether they have the experience and tools required to do the work you want. Specialist Mobile Electronics retailers have typically invested tens of thousands of dollars in tools and training so that their staff is ready to take on any challenge.

You can also learn a lot about a shop by the kinds of questions the sales teams ask you and the type of information they provide. If the salesperson is reading features off of the box the product comes in, they may not be genuinely qualified to provide you with the exact solution you need. True experts in the industry dedicate hundreds of hours each year to learning about the products they sell to make sure they offer excellent value and reliability.

The Bonus Buying Experience

If the shop you are visiting has a demo vehicle, ask to have a listen. Even if you have a modest budget, you can learn a lot about the shop’s capabilities by listening to a demo car and looking at the work they have performed. Looking at wiring around amplifiers and the battery is a great way to understand their level of commitment to doing great work.

We could go on for another 10,000 words about how to shop for car audio equipment. This article serves as a primer for the experience and to give you a few ideas about what to look for. Visit your local mobile electronics retailer and listen carefully to their advice.

This article is written and produced by the team at www.BestCarAudio.com. Reproduction or use of any kind is prohibited without the express written permission of 1sixty8 media.

Apple CarPlay and Android Auto smartphone integration systems are extremely popular features found in aftermarket source units from all the key brands. The technology behind CarPlay and Android Auto continue to evolve, and in the summer of 2017, the aftermarket industry saw the introduction of wireless CarPlay connectivity. Android followed suit in 2018 with a comparable solution that didn’t require cables. Let’s take a look at how wireless smartphone integration works and why it might be the perfect solution for the busy road warrior.

How Do CarPlay and Android Auto Work?

These infotainment solutions require two components to provide you with Internet-connected voice recognition access to your music, navigation and communication functions. First and foremost, the source unit in the vehicle needs to have the software built in. Including CarPlay and Android Auto in a multimedia receiver is a massive undertaking for a radio manufacturer. More so on the Apple side, because there are very strict and specific requirements for display size, interface design, processor speed and hardware components. The goal is to ensure that the experience for you, the consumer, is a good one. It can take several years of design, testing and approvals to bring a new radio model to market.

When you want to make a phone call or pick music to enjoy, you activate the voice recognition function on your radio and verbally request what you want. The radio will relay a digital recording of your request to the Apple or Google voice recognition servers using your phone’s Internet connection. The server will analyze the message and translate that into a command or sequence of commands that are sent back to your phone. Your phone will execute the command and display the outcome on your radio.

Up until recently, the connection between your phone and the radio for CarPlay and Android Auto has used a USB cable. With the introduction of wireless connectivity, things have changed. A Wi-Fi connection between your source unit and your smartphone replaces the wired connection for reliable, high-speed communication. Initially, a little more setup is required to get your smartphone and radio talking, but once configured, everything operates intuitively.

Wireless Apple CarPlay

Contrary to some reports that claim wireless CarPlay started with iOS 9, this functionality launched with the introduction of iOS 8.3 in April 2015. It was several years before anyone had a viable and tested application on the road. Remember our comment about development and testing time?

Wireless Android Auto

In November 2017, Google announced the ability for devices running Android to run Android Auto as a stand-alone app without the need for an aftermarket source unit. At CES 2018, several aftermarket manufacturers announced they would include wireless Android Auto connectivity on their new source units.

At the time of launch, only smartphones from Google themselves would work with wireless Android Auto. These phones include the first- and second-generation Google Pixel and Pixel 2, the Nexus 5X and the Nexus 5P. Rumors began circulating in the summer of 2018 that some devices running the Oreo version of the Android operating system (Android 8.1) may become compatible with wireless Android Auto in the future. These rumors also include speculation that devices running Android P (the next version of Android, presumably called Android 9) will support wireless connectivity with more devices.

Do You Need Wireless Smartphone Connectivity?

There are have been many discussions about the benefits and drawbacks of wireless connectivity. The biggest point of debate is around phone charging. In most cases, drivers take advantage of the ability to charge their phones when they get in their vehicles as they travel. For most people, this requires that the USB cable is connected to their phone. With that said, the Apple iPhone 8, 8 Plus and X include wireless charging. On the Android side, recent devices from Samsung, LG, Google, Microsoft and Blackberry include wireless charging.

Flipping back to the cons side of the debate, you need a wireless charging base in your vehicle to take advantage of the wireless charging feature. Vehicles from Audi, BMW, Chrysler, Ford, Honda, Mercedes-Benz, Toyota, Volkswagen and Volvo include Qi compatible charging solutions. Qi is the standard for wireless charging for Apple devices.

Don’t fret: Several aftermarket suppliers, including Scosche, Belkin, Autoleads and Brandmotion offer wireless charging solutions that a mobile enhancement retailer can integrate with your vehicle.

A Simple Way to Stay Connected

If you are in and out of your vehicle often during the day, wireless smartphone connectivity, just like Bluetooth, is an ideal solution to get you connected quickly and easily. Without a way to charge your phone, you will want to keep an eye on the battery level, especially on long drives. To find out about the wireless smartphone connectivity and charging options that are available for your car, truck or SUV, drop by your local mobile enhancement retailer today and speak with one of their product experts.

This article is written and produced by the team at www.BestCarAudio.com. Reproduction or use of any kind is prohibited without the express written permission of 1sixty8 media.

Did you know that you can get great sound in your car or truck using your factory radio as the source? Gone are the days when upgrading your audio system meant swapping in a new receiver. Today, climate controls, vehicle configuration and more are part of the original radio and display, so changes are nearly impossible. Don’t fret: The latest integration modules on the market make getting great sound easy. Keep reading to find out how.

Keep Your Factory Radio

Fewer and fewer cars today have radios that only play music. They show backup camera images or include navigation, and many offer voice recognition systems to make communication safe and easy while you drive. But what are audio enthusiasts to do when they want great sound in their vehicles? Companies like iDatalink, PAC, NAV-TV and more have developed interfaces that extract an audio signal from the factory stereo system and let us connect new amplifiers and speakers with no hassles at all.

How Modern Factory Audio Systems Work

In the good old days, factory audio systems included a radio, a simple analog amplifier and speakers. If you had a luxury vehicle, the manufacturer may have opted to include a subwoofer for a little more (but still not enough) bass. The radio was a simple affair with a tuner, CD player, auxiliary input and maybe a USB port and satellite radio connection. The output of the radio either powered the speakers in the car directly or fed a signal to a small amplifier.

Modern audio systems work differently. The source unit is similar, though USB is standard now and navigation systems and smartphone interfaces (like Apple CarPlay and Android Audio) are becoming standard, too. Where things differ a great deal is in the amplifier. The source unit sends an audio signal to the amp, sometimes as a fixed-level analog signal, but more often as a digital signal. The amplifier now includes multiple channels of amplification, plus advanced digital signal processing and the volume control circuitry for the system. In short, the radio can’t work without the amp and vice versa.

Getting Great Sound from a Ford F-150

Let’s look at three common upgrades that mobile electronics retailers across the nation perform every day. Since 2009, the Ford F-150 has come equipped with an amplifier in the back of the truck that includes the master volume control for the system as well as equalization and crossovers for the speakers. Upgrading this popular vehicle required summing audio signals coming out of the amp back together and removing signal processing.

PAC, a division of AAMP Global, offers a product called the AmpPRO 4 AP4-FD11 that works with these vehicles. The AP4-FD11 interface contains two important components. First, an audio processor takes the fixed-level audio signal from the factory radio and feeds that to high-quality preamp outputs that will connect to a new amplifier. The second part of the module is a CAN network interface that monitors communication between the factory radio and amplifier. When the network interface detects audio-related messages like bass and treble adjustments or volume level changes, it routes appropriate commands to the audio processor and adjusts the output. In essence, the AP4-FD11 adds preamp outputs to an aftermarket radio.

The AP4-FD11 is compatible with late-model Ford F-150, Flex, Fusion and Taurus, and Lincoln MKS, MKT, MKX, MKZ and Navigator vehicles. A T-harness is included with the FD11 to make the installation easier for your installer.

Chrysler 300 Audio Upgrade Solutions

Another popular audio system upgrade interface is the iDatalink Maestro DSR1. Automotive Data Solutions partnered with the audio experts at Rockford Fosgate to develop this interface and tuning solution. ADS are experts in the field of CAN communication protocols, thanks to their experience with remote car starter integration modules.

ADS combined this expertise with the Rockford 3-Sixty digital signal processor to create a unique audio interface solution that includes powerful system tuning features. The 3.Sixty DSP includes adjustable slope crossovers, 31-bands of paragraphic equalization for each of the eight output channels and signal delay for speaker time alignment. In the right hands and with the right speakers and amplifiers, the DSR1 can be the heart of an impressive audio upgrade solution.

Chevy Silverado Head Unit Interface

NAV-TV has created an impressive solution that is compatible with Chevy, GMC and Cadillac vehicles with the MyLink and Cue-equipped 4-inch (IO4) and 8-inch (IO5/IO6) source units. This interface connects to the MOST (Media Oriented System Transport) digital signal that runs from the factory radio to the amplifier in these vehicles to extract six channels of full-bandwidth audio that is free from equalization or signal delay.

The M650-GM interface retains OnStar functionality, door chimes, Bluetooth communication and all audio functions like volume, bass, treble, balance and fader. T-harnesses are available for a variety of vehicles to make the installation neat and tidy.

Upgraded Amplifiers and Speakers for Better Sound

Even when you see a branded audio system like Bose, JBL, Harman-Kardon or Sony, automakers still take shortcuts with the quality of speakers they use in factory audio systems and, of course, the systems never seem to have enough power. Once an interface is installed to extract a usable audio signal from your car or truck, your installer can integrate your choice of speakers to create smooth and detailed sound with dramatically improved clarity. Your salesperson will help you pick the right amplifier to create a system that will play at the volume levels you want without distorting or sounding muddy. If you don’t have a subwoofer, dozens of options are available to improve the low-frequency performance of your sound system to make everything more lifelike and enjoyable.

Visit your local mobile enhancement retailer today to find out how your factory radio can become a key component in an amazing audio system that rivals the best concert halls and studios in the world.
This article is written and produced by the team at www.BestCarAudio.com. Reproduction or use of any kind is prohibited without the express written permission of 1sixty8 media.

One product that most car audio retailers offer that can benefit anyone with a car, truck or SUV is sound deadener. If your vehicle is noisy inside, gets hot quickly or people have trouble hearing you during hands-free phone calls, applying sound deadening can help dramatically. In this article, we’ll explain how sound deadening works and talk about the key benefits of adding damping material to your car, truck or SUV.

What is Sound Deadener?

If you have ever had the opportunity to look under the carpet or trim panels inside your car or truck, you may have seen patches of rubber or strips of butyl adhered to the body panels. The addition of this material by the automobile manufacturer adds mass to the metal panel. This added mass makes it harder for noise outside the vehicle to vibrate the panel and transfer noise to the interior of the vehicle.

Aftermarket sound deadening products work the same way. Most sound deadening is sold in sheets or rolls. The material is very dense and has one surface that includes a strong adhesive. Your installer can apply the material to flat metal surfaces like the doors, floor, roof, firewall, rear fenders and trunk of your vehicle.

Many damping materials like Dynamat Xtreme, Stinger RoadKill Expert, Wirez Premium Sound Deadening and Hushmat Ultra include a layer of aluminum on top of the flexible base layer. This aluminum adds strength to the damping material and allows it to span openings in door panels.

Some damping materials include a layer of closed-cell foam on top of the aluminum layer. Focal BAM and SoundSkins Pro are two common examples of damping materials with foam. Wirez, Dynamat and several other companies offer foam on its own as another option. This foam layer helps to reduce vibrations and rattles from objects touching the damping material. Under floors, it can prevent wire harnesses and cabling from buzzing. In doors, it prevents the rods that activate the door release mechanism and locks from rattling.

Another option for sound deadening is a spray-on solution. Cascade Audio Quiet Kote, Boom Mat Spray-On and bedliners like Line-X are a great way to add mass to flat metal surfaces.

Sound Damping Materials Make Your Vehicle Quieter

Several years ago, we took part in a test of the noise reduction capabilities of sound deadening material. The vehicle in question was a 2007 Jeep Grand Cherokee SRT with the 6.1-liter Hemi. The test started with three baseline measurements of the noise inside the vehicle. We took SPL measurements with the vehicle at idle and cruising at 40 miles per hour and 60 miles per hour. Happy with the measurements, we applied a layer of aluminum-backed damping material to the inner and outer door skins of the truck and repeated the measurements. Impressed by our findings, the last step was to treat the cargo area of the Jeep and repeat the tests once again. As you can see from the chart below, the results are impressive.

Condition Idle Cruise a 40mph Cruise at 60mph

No Deadening 88.5dB 99.0 dB 103dB

Doors 87.9dB 98.1dB 101.4dB

Doors and Cargo Area 84.7dB 94.3dB 98.7dB

Total Noise Reduction -3.8dB -4.7dB -4.3dB

Had we chosen a vehicle that came from the factory without a moderate amount of sound damping, the results would have been even more impressive.

How a Quieter Interior Improves Your Sound System

If you look at any of the sound deadening manufacturers’ websites, it will quickly become apparent that they all claim that adding sound deadening will improve the performance of your sound system. This is absolutely true and it helps in two unique and different ways.

First, by simply reducing the background noise in your car or truck, you improve the effective signal-to-noise ratio of your stereo. What does this mean? Having less background noise makes it easier for you to hear the quiet parts of your music. Imagine if you were listening to a track at a volume level of 100dB. If you have background noise level of 95 dB, any portion of the song that is around the 95dB level will have to battle with the background noise to be heard. If you can reduce the noise level in your car to 90 dB, you can hear more of your music.

The second and perhaps the most significant benefit of sound deadening is to improve the effectiveness of the speakers in your vehicle. In most cases, the doors of your car, truck or SUV have a hole in the inner skin for the speaker, and access holes for the window regulator, door handle and locking mechanism. A speaker produces an equal amount of sound from the front of its cone as from the back. If these two sound sources mix, they cancel each other out. This cancellation happens most often in lower frequencies, say below 300 Hz.

If you were to compare the in-car frequency response of a speaker mounted in the factory door location to that of a vehicle where a layer of sound deadening has been applied to the inner surface of the door, you would see a dramatic increase in bass output.

The graph below shows this very test in that 2007 Jeep Grand Cherokee. The effective output from the factory-installed 6×9 woofer increased by a jaw-dropping 8dB at 240Hz. The gains were visible for all frequencies below about 400Hz, which was, in this application, likely the upper crossover frequency of the speaker.

Another cool new product designed to help improve the performance of your sound system is Stinger’s RoadKill Fast Rings. These rings mount around the face of your door or rear parcel shelf speakers and seal up against the trim panel. The concept is that they help to channel all the sound from your speaker into the interior of the vehicle, rather than allowing it to bounce around inside the door. The rings also help reduce panel vibrations for better sound performance.

Sound Deadening Can Make Your Vehicle More Comfortable

If you watch TV shows like “Detroit Muscle,” “Truck Tech” or “Overhaulin’,” you’ve undoubtedly seen the guys apply a thorough layer of sound deadening material to the floor of some of the coolest hot rods ever. Not only do these materials help keep your vehicle quiet, but they also help block heat from the road, engine, transmission and exhaust from heating up the interior of your vehicle. Dynaliner from Dynamic Control of North America, D-Mat from Design Engineering and the aptly named Heat Barrier from Thermo-Tec are specifically designed to prevent heat transfer into the interior of your vehicle.

What to Look For When Buying Sound Deadener

Most shops latch onto a particular brand of sound deadening material that they find effective and reliable. In most cases, you can trust their choice. If you want to get picky, the most important aspect of choosing a high-quality damping material is to select one that will stay adhered to your vehicle.

There are two common problems that occur with damping materials. First, they simply may not have a strong adhesive or they require extensive surface preparation to stay adhered to a panel. Some damping materials will stick to slightly dusty surfaces without any problems. The second and more important concern is that the material itself is thermally stable. You don’t want the deadening to peel off when it gets hot in the summer. We’ve heard of many cases where vehicle carpets and headliners have needed to be replaced because damping materials turned to a liquid and contaminated them.

Install Comfort in Your Vehicle Today

If you want your car doors to close with a thud instead of sounding tinny, if you want to reduce the road and exhaust noise in your car or you want to improve the performance of your hands-free phone system, drop by your local mobile electronics specialist retailer and ask about having sound deadening installed in your vehicle. We know that you will be thoroughly impressed with the improvement.

This article is written and produced by the team at www.BestCarAudio.com. Reproduction or use of any kind is prohibited without the express written permission of 1sixty8 media.