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Is Turning Up the Bass on Your Car Stereo a Good Idea?

More Bass

If there’s one thing that can add emotion and excitement to your music, it’s adding a little more bass. Bass frequencies, especially those below 80 Hz, can be felt as much as heard at a higher volume level. The tingling in your amps and vibration in your back make a night at a club, your favorite concert or a high-end car stereo system some of the most enjoyable musical experiences available. The problem is, adding bass isn’t always easy. Let’s look at how many people do it and offer a few suggestions for enhancing the low-frequency performance of your car stereo.

Making Bass Takes Power

More BassIf you are an avid reader of our articles, then you know that it takes significantly more power to drive a subwoofer to an output level of 90 dB than it does for a set of tweeters. You can find out more about the physics behind that phenomenon here.

Unless the stereo system in your car has a dedicated amplifier with a switching power supply, it’s likely with 6.5- or 6×9-inch speakers as the largest size, it takes a lot of power to move the speaker cone enough to produce the bottom few octaves of our music.

More BassImagine “Thunderstruck,” “Bohemian Rhapsody” or “Yeah!” by Usher comes on Pandora and you can barely hear the bass line. Instinctively, you look for a way to turn up the bass with the tone control or EQ built into your car radio. More often than not, you are rewarded with a garbled mess that sounds less like music and more like the performer is munching on a rubber floor mat.

As much as this isn’t any fun, it’s really no surprise. That tiny little amplifier built into your radio is designed for moderate listening levels with fairly neutral overall tonal balance. That means, not a lot of bass relative to the mids and highs.

Problem defined. How do we fix it?

Does Adding Power Make More Bass?

More BassWhat if we visited our local car stereo shop and asked to have a 75-watts-per-channel amplifier installed between the factory radio and the speakers? Now, any signal that comes out of the radio is amplified and we don’t run out of power when the bass line kicks in, right?

In the simplest of terms, sure, adding an amplifier to your factory speakers helps a lot. With that said, you are still limited by the small size of the speakers. Worse, you are asking those relatively tiny woofers to move really far to produce bass, as well as midrange information. Unless someone has come up with a way to defy the laws of physics, more excursion always results in more distortion.

Adding an amp added a little bass, but made the midrange sound worse.

Will Upgrading Speakers Add Bass?

More BassLet’s say you skipped the amplifier idea and decided that upgrading to high-quality speakers was a better bet. Do better or more expensive speakers produce more bass than less expensive offerings? There’s almost no definitive way to answer that question in a single paragraph. Some speakers produce less midrange relative to the amount of bass they produce. There are also speakers that play lower than factory speakers. In both cases, the new speakers are typically less sensitive (require more power) than what’s already in your car or truck. In short, you may get the perception of more bass, but more often than not, you’ve ended up with less midrange.

The good thing about upgrading your speakers is that they can likely handle the power from an amplifier with fewer complaints and stress. So, if you upgrade your speakers and add an amplifier, your system might sound pretty good.

The Best Way to Add Bass is to Add a Subwoofer System

More BassImagine if there were a way to add an amplifier and speaker to your car or truck that was dedicated to reproducing bass. I know, it sounds far-fetched, right? Sorry, just kidding.

Adding a subwoofer and driving it with a dedicated amplifier, even if the selection is modest, will offer an impressive improvement in the reproduction of bass in your music. A powered 8-inch subwoofer that fits under a pickup truck seat or in the corner of your truck is a perfect starting point. Best of all, you can turn the bass settings on the radio back down and let the small speakers in your car do their job of reproducing midrange and high-frequency information. The result is a car stereo system that plays louder and sounds amazing.

Of course, there are an unlimited number of options for generic, vehicle-specific and custom subwoofer systems to add more bass to your car stereo. Your local specialist mobile enhancement retailer can help you choose a solution that will meet your needs. Drop by today and have a listen to what they have to offer.

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: RESOURCE LIBRARY, ARTICLES, Car Audio

Tools of the Trade – The Oscilloscope

Oscilloscope Tools

Our series of articles on what tools are important to test and configure a car audio system upgrade moves on to the oscilloscope. Tools like digital voltmeters, real-time audio analyzers and, of course, hand tools such as screwdrivers, side cutters, wire strippers and a socket set each have their place and importance. When it comes to analyzing the amplitude of electrical signals that change with time, only an oscilloscope can provide an installation technician with the information he needs.

What Is an Oscilloscope?

Oscilloscope ToolsAn oscilloscope is a device with a screen that displays the amplitude of a signal relative to time. The screen has several calibrated squares, each representing an adjustable time base or voltage level. Controls on the scope let the user change the time base and voltage ranges for the type of signal that is under inspection.

Why Is It Important for the Shop I Choose to Own an Oscilloscope?

Oscilloscope ToolsIf you are having an audio system installed in your car or truck, especially if an equalizer or digital signal processor is in the audio signal chain, having a scope is a sure-fire way of setting the amplifier sensitivity controls so they can achieve maximum output without significant distortion. Proper configuration ensures the highest possible signal-to-noise ratio, so hiss and background noise are kept to a minimum.

An Oscilloscope is an Important Tool

Oscilloscope ToolsA scope is also useful for testing the wiring in the car for audio and data signals to confirm that each electrical connection will function as intended. Some installers try to use a digital multimeter set to the alternating current (AC) voltage setting to perform these tests. While the meter may show some amount of information, there is no way to know the shape of the waveform to determine if the signal is digital or analog.

Finding a Quality Mobile Enhancement Retailer

As you search for a shop to work on your vehicle, we recommend that part of the process include a tour of their installation facilities. The install bay and fabrication area need not be spotless if they are working on vehicles, but they do need to have the right tools and supplies. Ask them what they use to set the sensitivity controls on the amplifiers you intend to buy. Hopefully, they have invested in the right tools and they own and know how to use an oscilloscope.

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: RESOURCE LIBRARY, ARTICLES, Car Audio

Product Spotlight: Audison SR Amplifiers

Audison SRThe Audison SR-Series amplifiers are now into their third generation and continue to offer amazing performance and value for car audio enthusiasts. The four amplifiers in the series offer impressive power along with installer-friendly features that make them a perfect solution for music lovers on a budget.

Introducing the New Audison SR Amplifiers

Audison SRThe SR-Series amplifier family begins with a pair of four-channel amps. The SR 4.300 is rated for 85 watts per channel into 4 ohms and 130 watts into 2 ohms. Each pair of channels can be bridged to produce a healthy 250 watts of power when connected to a 4-ohm load. Distortion is rated at 0.03% and the S/N ratio at -82 dB when referenced to 1 watt of output.

The larger four-channel amp is the SR 4.500. This amp is rated for four by 130 watts and four by 220 watts into 4 and 2 ohms, respectively. When both pairs of channels are bridged, it produces 450 watts per pair into 4-ohm loads. The S/N ratio for the big four-channel is -83 dB referenced to 1 watt and distortion is specified at 0.08%.

Audison SRThe five-channel SR 5.600 can deliver up to 75 watts from each of the four main channels when driving 4 ohm speakers and 115 watts with 2-ohm speakers. The mono subwoofer channel is good for 310 watts into 4 ohms and an impressive 550 watts into a 2-ohm load. All told, this amp can produce a healthy 1,010 watts of power. The front channel performance specs include a distortion rating of 0.02% at 70% of rated power. Noise specifications are -84 dB for the main channels and -75 dB for the subwoofer channel.

The final amp in the series is the SR 1.500. This monoblock subwoofer amp is rated for 500 watts into 4 ohms, 800 watts into 2 ohms and an impressive 1,000 watts into 1 ohm. Distortion is listed as 0.1% and noise is -75 dB referenced to 1 watt.

All four of the amps use Audison D Class Technology, which they call ADT. Interestingly, the full-range channels have a frequency response specification of 10 Hz to 35 kHz with a tolerance of -1.5 dB. That’s almost an extra octave over most Class D designs on the market. Very impressive.

Amplifier Design and Feature highlights

Audison SRThe new Audison SR amps are based on extruded and machined aluminum heatsinks. The end caps on the sides of the amps are finned and serve as the primary source of heat radiation from the output and power supply switching devices. Audison notes that the heatsinks are large enough to negate the need for a cooling fan, which can add noise or ingest debris into an amplifier. The overall footprint of the amplifiers is impressively small. All are 6.1 inches deep and 18.7 inches tall with lengths of 7.48 inches for the SR 4.300, 10.39 for the 4.500 and 1.500 and 11.57 for the 4.500.

All of the connections are made along the front edge of the amplifiers. According to the owner’s manual, the power connection block will accept 8 AWG cables, and the speaker blocks are good for 10 AWG wires. Over-current protection for the amps is handled by easy-to-find ATC/ATO fuses located in the left-side end cap.

Input signals are connected to the amps using chassis-mounted RCA terminals or through provided pigtail harnesses that connect to Molex plugs. The RCA connections are rated for 0.2 to 5 volts and the high-level inputs for 0.8 to 20 volts. All four amplifiers feature Audison’s Automatic Remote Turn-ON/OFF (ART) circuitry to enable the amplifiers when it detects the BTL voltage from a connected source unit when it’s turned on. The speaker-level inputs include Universal Speakers Simulator (USS) loads to ensure that factory-installed source units and amplifiers will function properly.

Audison SRAmplifier configuration adjustments and controls are on the top of each amp and are accessed by removing a panel. All SR amplifiers are well-equipped in terms of features, including a phase control on the SR 1.500 and optional subsonic filters on the subwoofer sections and the choice of full-range, high- or low-pass signals on the wide-bandwidth (non-subwoofer) channels. Multichannel amps can split the input signal from a single set of inputs to all the outputs, negating the need for Y-cables. All amps except the five-channel include a signal output RCA jack to cascade multiple amplifiers together.

The five-channel and monoblock amps have a 1/8-inch jack for the optional VCR-S1 remote subwoofer level control. The control allows users to adjust the subwoofer level from -20 to +6 dB.

Upgrade Your Car Audio System with Audison SR Amplifiers

If you are on a budget but still want the brand heritage that has made Audison a highly regarded solution, visit your local authorized dealer and ask for a demonstration of the new SR-Series amplifiers. They can design a premium upgrade that will dramatically transform the performance and output capabilities of almost any factory-installed car audio system. For more information, visit the Audison website and be sure to follow them on Facebook, Instagram, YouTube and Twitter.

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: RESOURCE LIBRARY, ARTICLES, Car Audio, PRODUCTS Tagged With: Audison

Understanding Specifications: Operating Voltage Tolerances and Protection Circuits

Operating Voltage

To close out our series of educational articles on amplifier specifications, we are going to talk about operating voltage limits and, by association, the protection circuits built into a car audio amplifier. In the good old days of electrical systems that were composed of an alternator, battery, switches and a couple of relays, delivering a relatively constant voltage to a car audio amplifier was easy. New technologies and limits on battery, alternator and wire size have made it much more difficult to keep our amplifiers happy.

Automotive Start-Stop Systems Cause Low Operating Voltage

Operating VoltageWith the never-ending battle to eke out every ounce of fuel efficiency from the vehicles we drive, automakers have resorted to systems that will shut down the engine to save fuel while idling. Transitioning from standard idle mode to the shut-down state doesn’t pose a problem for most amplifiers as the battery voltage only drops to the 12.2 to 11.5-volt range. If the voltage starts to drop because the car has been idling too long, the engine will restart automatically.

Operating VoltageWhat poses a problem for modern car audio amplifiers are the voltage dips associated with the engine starting. In conventional vehicles, the stereo is off while you are starting the vehicle. These start-stop systems keep everything running and playing as the engine restarts. Electrical system voltage can drop below seven volts while the engine cranks. Many amplifiers shut themselves down below nine or ten volts, and as such, your music would stop playing. While a pause in your music isn’t truly problematic, it can be annoying if you are stuck in stop-and-go traffic.

New amplifier designs include circuitry that will keep the amplifier active during brief low operating voltage conditions. Some companies specify their amps as being able to handle as little as 6 volts for as long as 5 seconds to ensure that your music plays without interruption. This same start-stop compliance design is required for digital signal processors to prevent them from shutting down during engine restarts.

Car Audio Amplifier Protection Circuitry

Operating VoltageThree decades ago, if you shorted the outputs of an amplifier, it would blow up, occasionally with spectacular results. Modern amplifiers include protection circuits that monitor different functions and automatically shut the amp down when an unwanted condition occurs. Most amplifiers include protection against overheating or short circuits on the speaker wires. Better amplifiers may provide a warning if a power connection over-voltage condition occurs that could damage the components inside the amp.

A select few manufacturers provide computerized monitoring of different parts of their amplifiers and flash error codes to let users know why the amp is in protection. Short circuits, over-voltage, under-voltage, over-temperature on the power supply and output stage and a notification about repeated short circuits are provided. This information makes it much easier and more efficient for a technician to troubleshoot an installation or speaker issue.

How Car Audio Amplifiers Handle Over-Temperature Conditions

Operating VoltageThere are two ways for an amplifier to protect itself if it gets too hot. The most common mode is for the amp to stop playing music so that the power supply and output switching devices can cool off. The second option is for the amp to reduce the output signal so that less heat is created. While it’s nice that your music won’t stop playing, most consumers tend to try and turn the volume up higher when the music gets quieter. Eventually, amplifiers that roll back power will go into a state of full protection and shut themselves down to protect components.

If you live in an area that gets hot during the summer, choosing an amplifier with adequate cooling from a large heatsink or a fan is a good idea. Cramming a tiny little amp into the corner of your trunk or cargo area may not be the best choice in this situation.

Visit Your Local Mobile Enhancement Retailer Today

If you are interested in upgrading the audio system in your car, truck or SUV, purchasing a new amplifier will be a fundamental part of the process. Your local specialist car stereo shop can help you wade through the hundreds of amplifier options on the market to find a solution that sounds amazing and works with your budget and performance expectations.

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: RESOURCE LIBRARY, ARTICLES, Car Audio

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

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