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Product Spotlight: Sony DSX-M80 Marine Bluetooth Receiver

Sony DSX-M80The introduction of the DSX-M80 Bluetooth receiver marks the newest version of Sony’s marine-grade High Power head unit in its current product line. It replaces the MEX-M100BT, which debuted Sony’s proprietary impressive High Power technology at 45-watts by four from its internal amplifier to a marine-grade radio. The fun doesn’t stop there – dual USB ports, dual Bluetooth connectivity, UV-resistant materials used for the face and trim, anti-corrosive coatings on its electronics and a suite of signal processing features make this radio an excellent solution for boats as well as powersports applications.

Sony DSX-M80

Sony High Power Source Unit Amplifier

Unlike typical car radios that use a single integrated circuit powered directly from the vehicle battery voltage, Sony has included a switching power supply and a four-channel Class D amp in the chassis of the DSX-M80. This amp is capable of producing at least 45 watts of power per channel into 4-ohm loads and is 2-ohm stable to bring even more power in that configuration. Sony also includes its Subwoofer Direct Mode, which lets you feed even more power to a single rear output connected to a subwoofer setup to bring your audio system to life without the need for an external amplifier.

Sony DSX-M80 Design and Interface

The display on the DSX-M80 features a high-contrast design with a white panel and black text that works well in bright sunlight. The 14-segment, 12-character display allows song titles and radio station information to be displayed accurately. The display and button backlighting colors can be set to any of more than 34,000 options, or you can use the Sound Sync mode to have the display change to the beat of your music. A key feature for marine applications is the inclusion of non-volatile memory that will maintain system settings, radio station presets and phone pairings when power is cut to the unit for storage or maintenance on the vehicle or watercraft.

Likewise, in keeping with the marine design, the radio’s face is constructed using UV-resistant materials that can handle prolonged exposure to the sun without fading or cracking. Sony has coated the main circuit board with a moisture-resistant conformal coating to help prevent corrosion in high-humidity environments.

Sony DSX-M80
A coating on the circuit board of the DSX-M80 helps prevent electrical connections from corroding in high-humidity environments.

Marine Entertainment Source Options

The DSX-M80 includes dual USB ports so you can connect an Android smartphone or Apple iPod, iPhone or iPad to play music. Android connectivity includes Android Open Accessory (AOA) 2.0 support. The rear USB port supplies 1.5 amps of charging current, and port on the front face supplies 1 amp. You can play up to 10,000 audio files in MP3, WMA, WAV, AAC or FLAC formats at up to 48 kHz sampling rates from a single USB device.

As mentioned, you can pair two Bluetooth devices simultaneously to this radio. The first connection can serve as an entertainment source using Bluetooth A2DP and AVRCP connections, giving you access to communication, navigation and music playback features. Pair a second phone for hands-free call connectivity.

Sony DSX-M80
Classy styling combined with a reverse LCD display and two-color illumination make the DSX-M80 look as great as it sounds.

There is a front-panel 1/8-inch aux input, and the AM/FM tuner features RBDS station information display. The radio tuner channel spacing can be changed to work with European and other countries’ standards. The DSX-M80 is compatible with SiriusXM satellite radio — just ask your retailer to add the optional SXV300 tuner module during the installation.

System Configuration and Tuning Features

Sony has included its EQ10 10-band equalizer along with the Extra Bass function so your system can be fine-tuned to deliver the frequency response you want. Adjustable high- and low-pass crossovers with adjustable slopes let your installer optimize the operating frequency range for each speaker in the system. ClearAudio+ and DSEE (Digital Sound Enhancement Engine) audio processing features help to recover audio information lost during the digital compression process or radio transmission to make your music sound better.

This radio is also compatible with the Sony | Music Center app. The app not only serves as a convenient music player, but it provides full remote control over the radio from your smart device. Your installer can even configure signal delay and level settings using the Advanced Car Audio Setting portion of the app to optimize the system for the given speaker locations in your boat or vehicle.

Sony DSX-M80
Your installer will have no problem upgrading an existing source unit with the DSX-M80, thanks to industry-standard wiring and connections.

Sony DSX-M80 Connectivity Features

The Sony DSX-M80 includes the aforementioned four-channel High Power amplifier and three sets of 5-volt preamp outputs. Connections are provided for the included Bluetooth hands-free microphone as well as an input for an optional steering wheel or helm control input interface. A programmable steering wheel control input feature allows connection to older resistance-based controllers that may already be installed in the boat. Your retailer can help you determine if your existing system will be compatible with this feature.

Sony DSX-M80
If you have an ATV or UTV that needs a high-power source unit, the Sony DSX-M80 is a great choice.

Upgrade Your Playtime with Sony

Whether you’re looking for a source unit for your boat, golf cart or side-by-side, the Sony DSX-M80 is a great option. It has all the source features you could ever want, and the High Power amplifier ensures that you can blast your music loud and clear. For more information, visit the Sony car and marine website or visit their Facebook, Instagram or Twitter social media sites.

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.

Filed Under: ARTICLES, Car Audio, PRODUCTS, RESOURCE LIBRARY Tagged With: Sony

Product Spotlight: SoundShield Sound Deadening

SoundShield Deadening

Car audio enthusiasts have been using sound deadening products to improve the comfort of their vehicles and the performance of mobile audio systems for decades. SoundShield is the newest name in the game, but the technology and team behind the products are a step above the rest. Read on to find out more about this innovative sound control material and the people who brought it to market.

Who’s Behind SoundShield?

SoundShield DeadeningIndustry legends John Schwartz and Bryan Schmitt are partners in SoundShield. John is the owner of Perfectionist Auto Sound and Security in Anchorage, Alaska. This prestigious car audio retail location has won the Retailer of the Year award not once but twice and has been recognized as the #1 Compustar retailer in the world every year since 2005. John is the chief executive officer of SoundShield.

Bryan Schmitt is the owner of the world-renowned Mobile Solutions car audio training facility and solution provider in Tempe, Arizona. Bryan is considered one of the top car audio and custom vehicle interior fabricators in the world, and his training services have elevated the quality and creativity of car audio technicians in every corner of the globe. Bryan is the vice-president of sales for SoundShield and is a managing partner in the company.

Bryan saw a need for a premium sound deadening solution that would provide world-class damping and sound absorption properties. Knowing that John had all the connections needed to bring the plan to fruition, these moguls combined their expertise to create SoundShield. The brand launched at the KnowledgeFest mobile electronics industry conference in August 2019.

What Is SoundShield Sound Deadening?

SoundShield DeadeningUnlike some asphalt- and vinyl-based products, SoundShield takes a three-pronged approach to improving the performance of your car stereo system while increasing the comfort in your car, truck or SUV. The base layer is 1.5 mm-thick butyl rubber. This layer adds mass to the panels it’s adhered to, making it more difficult for sound energy to be transmitted. The butyl features a high-tack adhesive to ensure it stays in place in even the hottest and coldest conditions.

The middle layer is an aluminum foil sheet. The foil acts as a thermal barrier and serves as a second structural component to further reduce sound energy transfer. The strength of the aluminum allows SoundShield to span openings in door panels to help transform them into a speaker enclosure.

The top layer of SoundShield is 3 mm of closed-cell foam. This foam absorbs additional sound energy that may radiate through the mounting service for better performance. More importantly, the foam prevents wire harnesses, door lock and door handle actuator rods and trim panels from buzzing and rattling caused by high-power aftermarket audio systems. The choice of closed-cell foam ensures that the material won’t hold water, which could lead to mold and mildew issues.

Why Do You Need SoundShield?

SoundShield DeadeningModern vehicles are designed to be as light as possible to reduce fuel consumption. Thin carpets, less underpadding and flimsier trim panels allow more wind and tire noise into the cabin. You can dramatically improve the comfort of your vehicle by having your local authorized SoundShield dealer install their damping material on the floor, firewall, trunk and cargo area, roof and both the inner and outer door skins. Reductions in road noise of 10 dB or more aren’t uncommon.

The primary benefit is that your car is, quite simply, quieter. You can hear more of the music from your existing stereo and wring out every last ounce of performance from a speaker or subwoofer upgrade. Because the vehicle interior is quieter, Bluetooth and voice-recognition technologies like Apple CarPlay and Android Auto will be more accurate.

If you’re looking for better performance from your audio system, having the openings in a car or truck door sealed will dramatically improve midbass response to bring your car stereo to life. The performance improvement realized by adding SoundShield can be more significant than that of purchasing better speakers, making it an excellent value.

Improve Your Vehicle with Premium Sound Deadening

SoundShield is available in 11-square-foot rolls. This is usually enough material to treat the inner and outer skins of a typical car door. If you’re interested in improving the performance of your car audio system, or are planning a new speaker purchase and want to maximize their performance, drop by your local authorized SoundShield retailer and ask about having your vehicle treated. To learn more about the product, visit the www.soundshieldusa.com website. Be sure to follow the company on Facebook and Instagram to see the latest projects created using SoundShield.

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.

Filed Under: ARTICLES, Car Audio, PRODUCTS, RESOURCE LIBRARY Tagged With: Soundshield

Product Spotlight: ARC Audio ARC Amplifiers

ARC AmplifiersBased in Modesto, California, ARC Audio is one of the few mobile electronics companies that still designs its amplifiers from scratch in the United States. The ARC Series trio of amplifiers represents a high-performance mobile audio amplification solution that incorporates features that aren’t available from competing products. Let’s take a look at what makes the ARC 1000.2, ARC 1000.4 and ARC 1000.6 truly special.

Premium Car Audio Amplifier Solutions

ARC AmplifiersCombining the latest high-frequency Class-D driver technology with the engineering experience and acumen of the ARC Audio team, the three ARC Series amplifiers not only produce impressive amounts of power, but they also sound amazing. Each amplifier is housed in an identical custom-tooled cast-aluminum heatsink. Four large hex-head cap screws (that conceal the mounting locations) and seven machined fins across the top of the amp provide classy contrast against the textured matte black powder coat finish. All the connections and controls for the amp are placed along the bottom edge to simplify installation, configuration and calibration. Power connections are made using a chassis-mounted terminal block that accepts 4-AWG cable, and speaker and remote connections are on quick-release plugs. All amplifiers include on-board fusing, so there aren’t any surprises at installation time.

ARC AmplifiersThe ARC amplifier family includes the ARC 1000.2 two-channel amp that produces up to 500 watts per channel into a 4-ohm load, 600 watts into a 2-ohm load, and 1,200 watts when both channels are bridged to a single four-ohm subwoofer. The ARC 1000.4 is a four-channel amp rated at 250 watts per channel into 2 or 4 ohms, and each pair of channels can be bridged to provide 500 watts to a single 4-ohm load. The ARC 1000.6 produces a beefy 175 watts from each of its six channels at 2- or 4-ohm impedances. Each of the three channel pairs can be bridged to produce up to 350 watts into 4-ohm loads. Switches underneath each speaker connector change the internal supply voltage to optimize power delivery so that 2- and 4-ohm power production is similar.

Amplifier Common Features

ARC AmplifiersAll ARC Series amplifiers use balanced differential inputs capable of up to 4 volts of input with the default analog signal input card or up to 32 volts input with the optional IPS8.8 DSP card in place This higher level of signal input range is optimum for connections with factory amplified OEM systems and from some higher output OEM radios. At a quick glance, you’ll notice that there don’t appear to be many signal processing options on the ARC Series amplifiers. The ARC 1000.2 has a variable high- or low-pass crossover while the four- and six-channel amplifiers don’t have any crossovers at all. ARC Audio designed the analog signal processing portion of these amplifiers to be easily removable so that they can be used with any of the Pro-Series DSP processors from ARC Audio. If space is a limitation in your vehicle, each model of ARC Series amplifiers can he upgraded with the IPS8.8 Pro Series digital signal processor by simply removing the front end signal input module and replacing it with the IPS8.8. We took a close look at the eight-channel Pro-Series DSP platform here.

Each amplifier has an Auto Sense switch that allows your installer to choose from the remote turn-on connection, DC voltage sensing and a signal sensing option in order to activate the amplifiers when connected to an aftermarket source unit or a factory-installed sound system.

Microprocessor-Controlled Features

ARC AmplifiersYou will note that each amplifier has a micro-USB port on the front panel. This port exists even if you haven’t opted for the IPS8.8 processor upgrade and provides access to adjust the color of the logo on top of the amp and to change the Class-D switching frequency. Knowing that high-frequency switching inherent in all Class-D designs can occasionally interfere with radio reception, the engineers at ARC allow access to adjust the switching frequency from 323.4 kHz to 450 kHz. In the unlikely event your ARC Series amp does affect radio reception in your application, your installer can resolve the issue with a few taps on his computer keyboard. No other amplifier manufacturer in the car audio industry includes this feature.

Build Your Car Audio System with ARC Audio Amplifiers

Whether you need the ARC 1000.2 to power a subwoofer or are designing a four-way fully active entertainment system with an ARC 1000.6 and an ARC 1000.2, these amplifiers will ensure amazing sound and unparalleled flexibility when upgraded with an IPS8.8 processor. Drop by your local authorized ARC Audio dealer and ask for a demonstration today. For more information about ARC Audio and their products, visit their website and follow them on Facebook, Twitter, Instagram and YouTube.

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.

Filed Under: ARTICLES, Car Audio, PRODUCTS, RESOURCE LIBRARY Tagged With: ARC Audio

Sound Deadening: A Great Upgrade For Any Vehicle

Sound DeadeningIf you have purchased a set of premium car audio speakers from a respected mobile electronics retailer in the past few years, then you should be familiar with the concept of sound deadening. If you aren’t familiar with this, or want to know more, then read on! We think you will find sound deadening is an often-overlooked upgrade that has more benefits than most people are aware of.

What Is Sound Deadening?

Automobile manufacturers apply small sheets of dense asphalt or butyl-based material to the floor, firewall or door panels of their vehicles. This damping material adds mass to the panel, making it more difficult for sound and vibration to move the panel and transfer sound into the interior of the vehicle. Automakers walk a fine line between adding weight to a vehicle to reduce noise versus losing fuel economy and handling characteristics due to this added mass. For this reason, most don’t go overboard with sound deadening. They are missing out on a great opportunity.

In spite of what they say in their marketing materials, manufacturers don’t really put that much emphasis on their audio systems. Even when vehicles include multichannel systems with well-recognised namebrands like Bose, Lexicon or JBL, little effort is put into maximizing the performance of the speakers. Proper application of sound deadening can have a dramatic effect on the performance of an audio system.

Aftermarket Deadening Materials

One of the first companies to actively promote sound deadening was Dynamat. Dozens have since followed suit with different approaches to controlling noise inside the vehicle. All of them work on the same principle of absorbing sound energy in one fashion or another and preventing it from being transferred to the interior of the vehicle. Sound deadening has two main benefits when it comes to car audio – exterior noise blocking and audio system performance improvement by preventing backwave cancellation.

Shop At Ralph's
Photo courtesy of Tip Top Customs

When you look at the inside metal skin of a car or truck door, you can see that there are openings to allow access to power window motors, door handles and other components in the door cavity. These openings are typically covered with a thin sheet of plastic. The purpose of the plastic is to keep water away from the interior door panel. That’s important, of course, but these openings work against your efforts to get good sound from your new speakers. There is just as much sound energy being produced from the rear of the speaker as there is from the front. If this rearward-facing sound is allowed to mix with the sound coming from the front, they cancel each other. The result is poor bass and midbass response. Sealing up these openings with a layer of sound deadening means the energy being produced by the rear of the speaker cannot mix with the frontal energy.

Just how dramatic can this cancellation affect be? We have seen instrumented measurements of a factory 6×9” speaker where the difference between having sound deadening or not produced an increase in output of up to 8 dB at several frequencies between 100 and 500 Hz. If you think about how much additional amplifier power it would take to produce the same increase in output, that’s more than six times are much. To be clearer, if you put 10 watts of power into the speaker and measured the response, you would need 63 watts of power into the same speaker to get the same output without the sound deadening. As you can see, that’s a significant difference, and the benefit is not just in efficiency, but in improved low frequency output. The speaker doesn’t have to work as hard, and that alone will improve the overall sound of your system.

It is well worth noting that an upgrade in speaker quality will not produce the same improvement in performance. With a properly sealed and damped door, an inexpensive speaker can easily outperform speakers costing five to 10 times as much money. Sound deadening is critical to the performance of an audio system.

Signal To Noise

Sound DeadeningThe second benefit of sound deadening is in keeping the interior of the vehicle quiet. When you make the interior quieter, the benefit is two-fold. Driving is more comfortable, since you hear less road, wind and tire noise. This reduction in noise also makes it easier to hear your audio system. You don’t have to turn it up quite as loud to drown out the remaining noise. You can hear the quiet parts of your music more easily. Your Bluetooth hands-free system will also sound better. In the same way that controlling backwave cancellation reduces the need for a speaker to work hard, having a quieter interior does the same.

Kinds Of Deadening

Sound DeadeningThere are many different kinds of sound deadening. The most popular are butyl sheets bonded to a thin aluminum layer. The combination works well to span large openings, but is thin and flexible enough to adhere to complex shapes. Other materials are made of vinyl and asphalt-based.

There are three key considerations when looking at different sound deadening products: How flexible is it? How thick is it? How well does it stay adhered once installed? On the engineering and development side, testing the damping characteristics at different temperatures can show quite varied results. Some materials don’t work as well in high or low temperatures. We have seen many people attempt to use materials not specifically designed for automotive applications. When the material melts and ends up as a gooey, black mess at the bottom of your door or leaks onto your carpet, the cost to repair the damage can be significant.

There are also several products on the market that add a layer of foam to the top of the aluminum layer. This foam is great when used between the inside door skin and the metal door because it eliminates buzzes and rattles.

See Your Specialist Car Audio Retailer To Learn More

The next time you are driving by a specialist car audio retailer, drop in and ask about sound deadening. Many people have chosen to apply sound deadening to otherwise stock vehicles. We guarantee the difference in performance from the audio system, combined with the increased comfort while driving, will be well worth the investment.

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.

Filed Under: ARTICLES, Car Audio, RESOURCE LIBRARY

Everything You’ve Wanted To Know About Audio Distortion – Part 2

Audio DistortionIf you were able to grasp the concepts outlined in the first article about audio distortion, then this one will be a piece of cake. If not, head back and have another read. It can be a bit complicated the first time around.

Undistorted Audio Analysis

When looking at the specifications for an audio component like an amplifier or processor, you should see a specification called THD+N. THD+N stands for Total Harmonic Distortion plus Noise. Based on this description, it is reasonable to think that distortion changes of the shape of the waveform that is being passed through the device.

The two graphs below show a relatively pure 1kHz tone in the frequency and time domains:

Audio DistortionA Look At Harmonic Distortion

Audio DistortionIf we record a pure 1 kHz sine wave as an audio track and look at it from the frequency domain, we should see a single spike at the fundamental frequency of 1 kHz. What happens when a process distorts this signal? Does it become 1.2 or 1.4 kHz? No. Conventional distortions won’t eliminate or move the fundamental frequency. But, it will add additional frequencies. We may have a little bit of 2 kHz or 3 kHz, a tiny but of 5 kHz and a smidge of 7 kHz. The more harmonics there are, the more “harmonic distortion” there is.

You can see that there are some small changes to the waveform after being played back and recorded through some relatively low-quality equipment. Both low- and high-frequency oscillations are added to the fundamental 1 kHz tone.

Signal Clipping

Audio DistortionIn our last article, we mentioned that the frequency content of a square wave included infinite odd-ordered harmonics. Why is it important to understand the frequency content of a square wave when we talk about audio? The answer lies in an understanding of signal clipping.

When we reach the AC voltage limit of our audio equipment, bad things happen. The waveform may attempt to increase, but we get a flat spot on the top and bottom of the waveform. If we think back to how a square wave is produced, it takes infinite harmonics of the fundamental frequency to combine to create the flat top and bottom of the square wave. This time-domain graph shows a signal with severe clipping.

When you clip an audio signal, you introduce square-wave-like behaviour to the audio signal. You are adding more and more high-frequency content to fill in the gaps above the fundamental frequency. Clipping can occur on a recording, inside a source unit, on the outputs of the source unit, on the inputs of a processor, inside a processor, on the outputs of a processor, on the inputs of an amplifier or on the outputs of an amplifier. The chances of getting settings wrong are real, which is one of the many reasons why we recommend having your audio system installed and tuned by a professional.

Frequency Content

Let’s start to analyze the frequency content of a clipped 1 kHz waveform. We will look at a gentle clip from the frequency and time domains, and a hard clip from the same perspective. For this example, we will provde the digital interface that we use for OEM audio system frequency response testing.

Here are the frequency and time domain graphs of our original 1 kHz audio signal once again. The single tone shows up as the expected single spike on the frequency graph, and the waveform is smooth in the time domain graph:

Audio DistortionLow Distortion Analysis

The graphs below show distortion in the audio signal due to clipping in the input stage of our digital interface. In the time domain, you can see some small flat spots at the top of the waveform. In the frequency domain, you can see the additional content at 2, 3, 4, 5, 6 kHz and beyond. This level of clipping or distortion would easily exceed the standard that the CEA-2006A specification allows for power amplifier measurement. You can hear the change in the 1 kHz tone when additional harmonics are added because of the clipping. The sound changes from a pure tone to one that is sour. It’s a great experiment to perform.

Audio DistortionHigh Distortion Analysis

The graphs below show the upper limit of how hard we can clip the input to our test device. You can see that 1 kHz sine wave then looks much more like a square wave. There is no smooth, rolling waveform, just a voltage that jumps from one extreme to the other at the same frequency as our fundamental signal – 1 kHz. From a frequency domain perspective, there are significant harmonics now present in the audio signal. It won’t sound very good and, depending on where this occurs in the audio signal, can lead to equipment damage. Keep an eye on that little spike at 2 kHz, 4 kHz and so on. We will explain those momentarily.

Audio DistortionEquipment Damage From Audio Distortion

Now, here is where all this physics and electrical theory start to pay off. If we are listening to music, we know that the audio signal is composed of a nearly infinite number of different frequencies. Different instruments have different harmonic frequency content and, of course, each can play many different notes, sometimes many at a time. When we analyze it, we see just how much is going on.

What happens when we start to clip our music signal? We get harmonics of all the audio signals that are distorted. Imagine that you are clipping 1.0 kHz, 1.1, 1.2, 1.3, 1.4 and 1.5 kHz sine waves, all at the same time, in different amounts. Each one adds harmonic content to the signal. We very quickly add a lot more high-frequency energy to the signal than was in the original recording.

If we think about our speakers, we typically divided their duties into two or three frequency ranges – bass, midrange and highs. For the sake of this example, let’s assume we are using a coaxial speaker with our high-pass crossover set at 100 Hz. The tweeters – the most fragile of our audio system speakers – are reproducing a given amount of audio content above 4 kHz, based on the value of the passive crossover network. The amount of power the tweeters get is proportional to the music and the power we are sending to the midrange speaker.

If we start to distort the audio signal at any point, we start to add harmonics, which means more work for the tweeters. Suddenly, we have this harsh, shrill, distorted sound and a lot more energy being sent to the tweeters. If we exceed their thermal power handling limits, they will fail. In fact, blown tweeters seem as though they are a fact of life in the mobile electronics industry. But they shouldn’t be.

More Distortion

Below is frequency domain graph of three sine waves being played at the same time. The sine waves are at 750 Hz, 1000 Hz and 1250 Hz. This is the original playback file that we created for this test:

Audio Distortion

After we played the three sine wave track through our computer and recorded it again via our digital interface, here is what we saw. Let’s be clear: This signal was not clipping:

Audio Distortion

You can see that it’s quite a mess. What you are seeing is called intermodulation distortion. Two things are happening. We are getting harmonics of the original three frequencies. These are represented by the spikes at 1500, 2000 and 2500 Hz. We are also getting noise based on the difference between the frequencies. In this case, we see 250 Hz multiples – so 250 Hz, 500 Hz, 1500 Hz and so on. Ever wonder why some pieces of audio equipment sound better than others? Bingo!

As we increase the recording level, we start to clip the input circuitry to our digital interface and create even more high-frequency harmonics. You can see the results of that here:

Audio Distortion

Now, to show what happens when you clip a complex audio signal, and why people keep blowing up tweeters, here is the same three-sine wave signal, clipped as hard as we can into our digital interface:

Audio Distortion

You can see extensive high-frequency content above 5 kHz. Don’t forget – we never had any information above 1250 Hz in the original recording. Imagine a modern compressed music track with nearly full-spectrum audio, played back with clipping. The high-frequency content would be crazy. It’s truly no wonder so many amazing little tweeters have given their lives due to improperly configured systems.

A Few Last Thoughts about Audio Distortion

There has been a myth that clipping an audio signal produces DC voltage, and that this DC voltage was heating up speaker voice coils and causing them to fail. Given what we have examined in the frequency domain graphs of this article, you can now see that it is quite far from a DC signal. In fact, it’s simply just a great deal of high-frequency audio content.

Intermodulation distortion is a sensitive subject. Very few manufacturers even test their equipment for high levels of intermodulation distortion. If a component like a speaker or an amplifier that you are using produces intermodulation distortion, there is no way to get rid of it. Your only choice is to replace it with a higher-quality, better-designed product. Every product has some amount of distortion. How much you can live with is up to you.

Distortion caused by clipping an audio signal is very easily avoided. Once your installer has completed the final tuning of your system, he or she can look at the signal between each component in your system on an oscilloscope with the system at its maximum playback level. Knowing what the upper limits are for voltage (be it into the following device in the audio chain or into a speaker regarding its maximum thermal power handling capabilities), your installer can adjust the system gain structure to eliminate the chances of clipping the signal or overheating the speaker. The result is a system that sounds great and will last for years and years, and won’t sacrifice tweeters to the car audio gods.

If you want to learn even more about audio distortion, go back and read Part 1 of this article!

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.

Filed Under: ARTICLES, Car Audio, RESOURCE LIBRARY

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