For more than 20 years, car audio enthusiasts have been asking their peers for advice on the internet. These discussions and debates started on forums like Carsound.com and Termpro.com then moved to social media platforms like Facebook and Reddit. As more and more people joined in these discussions, the clarity, focus and information accuracy has suffered. Now, a simple question about upgrading speakers or adding a subwoofer to a vehicle could yield an accurate answer from an experienced professional or lead you in a completely wrong direction. Let’s take a quick look at the complexities of getting car audio information from online resources.

Who Are the Experts?

Before you decide to ask a question about modifying or upgrading your vehicle with new audio equipment, consider the expertise and training of the people you are asking. Are they hobbyists? Do they have hands-on experience? Have they attended manufacturer or industry training events? The relevance of this information depends on the age of the vehicle you are working on. If it’s a ’90s Honda Civic, then even a rudimentary understanding of physics may be adequate to supply you with usable information.

If you are asking about a vehicle built in the last few years, specific knowledge of acoustics, advanced signal processing and detailed system testing methodologies are required. Upgrading a car or truck that uses MOST (Media Oriented Systems Transport), CAN (Controller Area Network) bus or A2B (Automotive Audio Bus) can be impossible without the correct hardware interfaces. The days of checking wires with a voltmeter are long gone.

What Are Your Goals?

One of the most common questions people ask online is, “How do I get better sound?” If you walk into the showroom of a professionally trained mobile enhancement retailer, the product specialist will likely reply by asking a series of questions. These questions are designed to help develop an understanding of your existing audio system and the specific aspects that you want to improve. The specialist may ask to have a listen to your vehicle so that you can provide examples of what you enjoy. As you can imagine, this is completely impossible through any form of online information exchange. Keep this in mind before purchasing an upgrade online.

Troubleshooting Problems

Another popular series of online questions focuses on resolving installation issues. Problems with wiring, component mounting and system configuration are very popular. If you have a problem with a radio or amplifier not turning on, someone with basic electrical knowledge can likely provide you with a few things to check. You will, however, need a multimeter to perform the tests. Odds are, if you own the meter, you should already know enough about electrical theory to know what to test, but that’s not always the case. If you don’t own a meter, well, you need one. The same applies to figuring out why a radio might not turn on or why a speaker has stopped working. Having the right information without the right tools does you no good. Visiting a local car audio shop will likely save you a lot of time and hassle.

Audio System Component Selection

Asking questions about which car audio components to buy is perhaps one of the worst things you can do to get good advice. First, the person answering the question needs to have a complete understanding of the application. Say you are asking about new speakers for a car. The answer needs to take into account the diameter of the existing speakers, the mounting depth requirements, the need for and availability of mounting adapters and spacers, and the capabilities of the person who will be performing the installation.

Next, the issue of quantifying the quality of a speaker is one that even many professionals struggle with. What makes one speaker better than another? Some of the criteria are simple and easy to understand. Power handling specifications are important but can be misleading if the specification isn’t quantified properly. You can learn more about this complex subject here.

Looking at speaker frequency response graphs can, in the eyes of someone with experience, tell you a lot about the speaker design. Ripples in the response measurements show where distortion may be occurring or where energy is stored and released by the driver as unwanted output. In terms of looking at graphs, more output isn’t always better. Finally, a look at the drivers’ Thiele/Small parameters and an associated simulation in computer software can tell a lot about the suitability of a driver for a specific application. For example, a small midrange driver with a high total Q-factor may not be suitable for use in a speaker pod on a dash or A-pillar.

Visit the Experts for Valuable Car Audio Advice

If you’re interested in upgrading the audio system in your car or truck, do some research. Start by finding out the car stereo shops in your area. Look to see if they have any Mobile Electronics Certified Professionals (MECP) on staff. MECP is a good starting point to ensure that you are talking to someone who has a commitment to product training and industry knowledge. Finally, ask to see examples of and hear their work. They should have demo vehicles available to audition. Only after you’re comfortable about the shop’s expertise should you begin the process of inquiring about upgrading your vehicle.

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.

Wouldn’t it be nice to have a really small car audio amplifier that would make lots of power and fit in the palm of your hand? Based on experience, we’ve come to expect that consumer electronics increase in power and capability while shrinking in size as new generations are released every year or so. For computers, Moore’s law has held true with a doubling of transistors in a computer processor every two years. That same philosophy doesn’t work for amplifiers. Here are a few things to think about before you rush out to buy a really small amp for your car or truck.

Car Audio Amplifier Efficiency

Mobile audio amplifiers need to have a heat sink because they are not 100% efficient. This lack of perfect efficiency means some of the power that goes into the amp is converted (or wasted) as heat rather than being output to your speakers. For a Class-AB amp, efficiency at 1/3-rated power might be around 35% and a Class-D amp would be up around 70%. Even at 70%, if the amp is producing 100 watts of power, it’s still turning 43 watts into heat.

This heat, if not controlled, will damage the components in the amp. To prevent this, amplifier designers attach heat-generating devices to a heat sink. Most modern amplifiers use aluminum extrusions to wick heat away from the transistors and MOSFETS that handle large amounts of current. The heat sink needs to transfer this heat into the air around the amp and as such, it needs to be a specific size for a given amount of energy transfer.

What Happens When an Amplifier Heat Sink Is Too Small?

Sadly, there are lots of amplifiers on the market that don’t have large enough heat sinks. What happens when these amplifiers get hot? Depending on how the amp was designed, it may simply turn itself off at a certain temperature. Some amps include circuits that reduce the voltage of the power supply in hopes of reducing the amount of power being wasted.

If you live somewhere that experiences high temperatures, or you listen to your music at high volume levels, have your local specialty mobile enhancement retailer help you choose an amplifier with a large enough heat sink that it functions reliably.

What Else Limits the Size of a Car Audio Amplifier?

Aside from needing enough space to physically house the power supply, signal processing and output devices, another factor that puts a limit on the size of an amplifier is having enough room for the various connections and controls required to make the amp work. Once a designer has found room for the power, signal and speaker connections, he or she needs to find room for sensitivity and crossover adjustments, as well as switches for crossover functions. Subwoofer amps often need a jack for a remote level control, and that space is part of the chassis design. If the amp needs bandpass crossovers, an infrasonic filter and signal routing switches, the end panels of the amp can very quickly run out of space.

Is a Small Car Audio Amplifier Better?

As we mentioned in our article about compact amplifiers, cramming a lot of circuitry in a very small space has some drawbacks. In almost every example we’ve seen, really small car audio amplifiers have worse signal-to-noise performance specifications than their larger counterparts. The last thing you want after having your mobile audio system upgraded is to hear hiss between songs.

Choose Reliability of Size

Unless you are trying to fit an amp into a very small location like the fairing of a motorcycle, you are always better off choosing a solution with a relatively large heat sink and, most importantly, great specifications. Drop by your local specialty mobile enhancement retailer today to audition the different amplifiers available to suit your car audio system upgrade.

Many new cars and trucks don’t come with a CD player. Music stored on our smartphones and the multitude of streaming audio services has, sadly, made compact disc technology almost obsolete. If you still have an extensive collection of discs, your local specialty mobile electronics retailer has a variety of add-on solutions to make it easy for you to enjoy your favorite music.

What Happened to the Compact Disc?

According to the Recording Industry Association of America, sales of compact discs peaked at just under 1 billion units in both 2000 and 2001. One of the key factors in the subsequent decrease in CD sales was the advent of peer-to-peer file sharing through programs like Napster. At the same time, the Apple iPod launched in 2001 and by 2005, iTunes song sales exceeded CD sales in Tower Records and Borders. The next hit was the advent of music streaming services like Pandora (based on the Music Genome Project) and Spotify. CD sales have now dropped to a level similar to that of 1986, and it’s reported that the sales of vinyl records have exceeded that of the compact disc.

Seeing this trend, vehicle manufacturers like Buick, Chevrolet, GMC, Cadillac, Chrysler, Dodge, Mazda, Subaru, Honda, Kia and Jeep have omitted a compact disc mechanism in their new vehicles. This omission not only reduces the cost of the infotainment system, but it also opens up valuable space in the center stack (the portion of the car dash that extends down to the center console) for larger displays.

Can You Add a CD Player?

Several companies have created add-on CD player solutions that connect to your factory radio using the USB port. These devices are special and uniquely distinct from a computer USB drive like an Apple SuperDrive or something from Asus or LG. The primary difference is that the software in the vehicle-specific drives is programmed to make the car radio think it’s connected to a media player. The audio tracks on your compact disc are presented to the radio in the same format as you’d find MP3 files on a USB memory stick.

Secondly, automotive compact disc mechanisms include suspensions that help reduce the chances of skipping and drop-outs as the vehicle goes over bumps.

Once the device is installed, you can slide a disc into the player and select the USB media source option on your factory radio. The tracks on the CD will show up the same way as if they were stored on a memory stick. It’s worth noting that you are unlikely to see the album, artist and song name on the screen.

Upgrade Your Car Stereo System Today

Whether you want to add a CD player or SiriusXM satellite radio, your local specialty mobile enhancement retailer will probably have a solution for your needs. Drop by and let them know what’s missing. They’ll do their best to help you out!

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.