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Smartphone Versus Built-in Navigation – Which Is Best?

Smartphone Navigation

There’s no denying the convenience of having a navigation system in your vehicle, whether it’s smartphone-based or built into your radio. With the nearly instant popularity of Apple CarPlay and Android Auto, smartphone-connected radios are quickly replacing built-in navigation solutions as the upgrade of choice. The question is, which is the better navigation solution? Let’s look at some of the benefits and drawbacks of each technology.

What Is Built-In Navigation?

If you are purchasing a new media receiver for your car or truck, there are options from Kenwood, Pioneer or Alpine for units with built-in GPS-based navigation systems. When we talk about built-in nav, we’re referring to a solution where the navigation software and mapping are built right into the radio.

What Is Smartphone Navigation?

Smartphone NavigationWhen we discuss smartphone navigation, we aren’t talking about sticking your phone on a mounting bracket on the dash. While that is functional, it lacks the true integration features that make systems like CarPlay and Android Auto so desirable. For iPhone users, Apple CarPlay allows you to use Apple Maps, Google Maps or Waze to navigate to the destination of your choice. Most Android Auto users use Google Maps or Waze for directions. Motion X GPS and iGo Navigation are some additional alternative navigation software solutions. Media receivers with Apple CarPlay and Android Auto are available from Sony, Kenwood, Pioneer, JVC and Alpine.

What Does Smartphone-Integrated Navigation Offer?

Smartphone NavigationThere are three significant benefits to using your phone with Android Auto or CarPlay for navigation. First and foremost, the map data is always as fresh as possible. As long as you’re connected to the internet, you have instant access to the latest map information used by Apple Maps, Google Maps or Waze and you never have to purchase an update. In-dash systems require updates that typically involve purchasing new mapping.

The second benefit is the voice recognition interface. If you want to go to a specific address, you can tell the system where you want to go using conversational English commands. The programmers at Apple and Google call this technology natural language processing, and it’s based on rudimentary forms of artificial intelligence. Don’t worry, Skynet isn’t active, yet.

Smartphone NavigationWhile some built-in nav systems will accept voice commands, what you say and how you say it needs to be very specific. You might be able to say, “Navigate to 100 Main Street in Anytown USA,” whereas your smartphone will understand “get me directions to,” “help me find,” “take me to” or “plan a route” and then the address.

The third benefit is access to real-time destination information. You can search by address, by a company name or even a category. Ask for a Korean BBQ restaurant, a gas station or a hospital – whatever you need, whenever you need it. Best of all, the information is stored in the cloud (which we all know is just someone else’s computer) and never needs to be updated. Built-in navigation systems rely on destination (called Point-of-Interest or POI) databases that are stored alongside the map data. Just like the maps, these need to be updated frequently to remain accurate and useful.

Drawbacks of Smartphone Navigation?

Well, one potential drawback of using your smartphone for navigation is that it will consume some amount of data. Depending on whom you ask, Google can use between 0.6MB and 2.2 MB of data per hour. That’s pretty low. Waze, thanks to its simple interface, is even lower and Apple Maps is a little higher. If your cellular plan has limited data access, it’s something to keep in mind, but not obsess over. If you travel over the border between Canada and the US or into Mexico, be sure to take potential data roaming charges into account.

Smartphone Navigation
A journey to the other side of the Niagara River to visit Canada or the US when using cellular data could cost you more than you expect.

One option for overcoming this limitation is to download the map data you need directly to your phone while you’re connected to the internet at home or work. Within Google Maps, you can choose how much map area you want to download. Something worth noting: You have to download enough map information to cover your entire route. For example, if you download downtown Buffalo and downtown Detroit in separate files, the system can’t plan a route between the two without internet access. Nevertheless, it’s better than nothing.

Smartphone Navigation
Downloading map data to your phone while at home or work can reduce cellular data charges.

Benefits of Built-In Navigation Solutions

No matter where you are, your navigation system is ready and willing to help you reach your destination. You never have to worry about internet connectivity or additional cost to use the solution you already own. There are never problems plugging things in because of damaged or low-quality cables or connectivity issues because of software updates from Google or Apple. In fact, you don’t need to remember to plug in your phone, or even take your phone with you to get where you want to go.

Drawbacks of Built-In GPS

Navigation solutions built into your radio rely on map data stored on an SD or microSD card. Companies like TomTom and Google (which create and own the map data) see the dissemination of this information as a profit center. The company that developed the navigation software in your car radio (Garmin or NavNGo, the maker of iGO) needs to include a license for the map data contained in the system. If the map information isn’t accurate, then you’ll need to purchase an update from your supplier. You’ll need a computer and likely a memory card and reader to complete the update. Quite simply, if your maps aren’t up to date, then the route the system plans man not be accurate, or even possible.

Smartphone Navigation
Map updates from companies like Naviextras and Garmin can cost $100 per year and are typically six to 12 months behind actual road conditions.

Choose the Navigation Solution that Meets Your Needs

Where you drive and how often you need directions will determine whether or not you choose a multimedia receiver with built-in navigation, with CarPlay and Android Auto or both. Your local specialist mobile enhancement retailer can help you choose one that works perfectly for your needs and fits nicely into your vehicle. Drop by and check one out today!

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, Navigation

Tools of the Trade – The Digital Multimeter

Digital Multimeter

Our continuing look at the tools a mobile enhancement technician should have at his or her disposal brings us to the ever-important digital multimeter. In the same way that an RTA or oscilloscope is needed to measure and quantify alternating-current signals, a high-quality multimeter is the only way to accurately quantify a DC or fixed-frequency AC signal. Read on to find out how technicians use their digital multimeters (DMM) to test the wiring in your car to make the installation process more accurate.

What Is a Digital Multimeter?

In essence, a DMM is a battery-powered, handheld device with a digital display that can perform several measurements. A DMM is occasionally (but rarely) called a Volt-Ohm-Milliammeter (VOM), giving us some insight into its capabilities. In almost every case, the meter will have between two and four terminals at the bottom for the connection of the test leads and an LCD or VFD (vacuum fluorescent display) screen at the top of the unit to show the measurement reading. Some of these displays include an analog bar graph that can be used to help detect transient signals. Finally, the function selection is made by a rotary control in the middle of the unit.

Digital Multimeter

Most units will measure direct current (DC) and alternating current (AC) voltages to either detect or quantify the presence of voltage on a terminal or wire. Meters separate the DC and AC measurements into different functions as some math needs to be applied to the AC measurement to create an RMS value. Premium meters known as True-RMS systems are more accurate when measuring AC signals outside of the 50-60Hz frequency region.

Multimeters can also measure resistance. They perform this task by feeding a very small amount of current through a device (resistor or circuit) and measuring the voltage drop across a fixed resistance value. DMMs are good at measuring resistance above an ohm or two and up to about 50 megohms. Below 1 ohm, the resistance of the cables and connections becomes an issue.

Finally, most meters can be used to measure AC and DC flow. The meters have an internal shunt resistor that is wired in series with the circuit. The voltage produced across this shunt resistor is converted to a current flow measurement. The test lead connects for current measurements are different than those for voltage and resistance readings.

Digital Multimeter
An old analog multimeter from RadioShack. While still great for some measurements, analog meters should not be used to test circuits in modern vehicles with data systems or airbag wiring.

How Technicians Use a DMM

When you are having a remote car starter, security system or even a new radio installed in your car or truck, the technician will use a multimeter to test the wires in the dash for the presence of voltage. In almost all cases, the tech needs to find a good ground, a constant power source and a switched (or accessory) source to feed and control the device.

Resistance measurements come in handy when testing speaker wires or terminals on a subwoofer enclosure to estimate the impedance of a speaker. For techs who are installing remote starters on older General Motors vehicles, they use the ohmmeter function to measure the value of the Passlock resistor in the key. It’s worth noting that the ohmmeter in a DMM can’t be used to test the suitability of a ground connection accurately. A proper grounding point should have well under 0.01 ohms of resistance.

Digital Multimeter
DMMs aren’t good at measuring very low resistances. This image shows the resistance of the test leads and connections using a good-quality Fluke digital multimeter.

Finally, taking current measurements is ideal for troubleshooting situations where car batteries are being drained. If you have a situation where your car battery is dying after a few days, the technician can measure the current being drawn from the battery to start the diagnosis and repair process.

Digital Multimeter
D’Amore Engineering in Camarillo, California, offers the AMM-1. This meter is designed specifically for car audio technicians and includes AC and DC voltage measurement, maximum and minimum DC voltage readings and incredibly accurate amplifier power measurement capabilities.

Choose the Right Mobile Enhancement Retailer

As we’ve mentioned in the past, choosing the right person to work on your vehicle is the most important aspect of the upgrade shopping process. A moderate-quality upgrade that has been installed and configured correctly will undoubtedly outperform a premium product that hasn’t been installed with care. When you tour the shop as part of your retailer interview process, make sure they have the tools required to perform the work you need. At the top of that list of tools is a quality digital multimeter.

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

How Does a Car Audio Amplifier Work – The Class AB Output Stage

Class AB Amplifier

As we continue our look at how car audio amplifiers work, let’s discuss how the classic Class AB amplifier output stage works and explain why it’s still the benchmark for high-end audio systems.

How Does a Class AB Output Stage Work?

We recently looked at the power supply, the input stage and how Class D output stages work to allow your car audio amplifier to reproduce music. If you go way back to the beginning of high-power car audio amplifiers, you’ll find the Class AB design.

A Class A amplifier uses a single output transistor to add current to the output signal to drive your speaker. When no music is playing, the output device is halfway on and gets very hot. Think of the output as a resistor. If you put two small resistors in series across your power supply, a lot of current would flow through the load. A Class A amp works the same way.

Class AB Amplifier

Class B amplifiers use a pair of output devices and split the voltage delivery duties between each device. When no music is playing, both devices are turned off and no voltage is produced at the speaker. The problem with Class B amps, as the guys at BestCarAudio.com discussed in their Class AB Amplifier Distortion article, is that there a dead zone that occurs as the voltage across one of the diodes in the transistor is biased on. The result of not compensating for this roughly 0.7-volt bias requirement is called crossover distortion.

Class AB Amplifier

Class AB Amplifier Output Stage

The Class AB amplifier is a Class B amplifier with a small bias voltage applied to the output devices to get them ready to play music. Different amplifier designs use different amounts of biasing to balance between efficiency and silky-smooth operation.

Class AB Amplifier

Amazing High-Frequency Extension

Class AB AmplifierOne thing that high-end Class AB amplifiers are known for is their extended high-frequency performance. Many top-end amps can play beyond 80 kHz with ruler-flat, low-distortion performance. If you are building an audio system that is compatible with high-resolution audio, this extended high-frequency response is crucial.

Low Output Impedance

Class AB AmplifierAs compared to Class D amplifiers that use inductors and capacitors on their outputs, Class AB amplifiers, except in configurations with variable voltage power supplies (often called Class G or Class H designs), don’t need these devices. The result is less variance in output voltage relative to load impedance and more predictable response.

Image: Voce.jpg

Efficiency versus Performance

Class AB AmplifierAt low to medium power levels, Class AB amps are not as efficient as a Class D amplifiers because the output devices act like resistive voltage dividers across the power supply rail voltages. As such, AB amps need larger heatsinks to ensure their reliable operation. As you approach the upper limits of an AB amplifier’s output capabilities, their efficiency becomes similar to that of a Class D amp. The output devices are close to being all the way on or off.

Experience the Ultimate in Car Audio Amplification

If you are determined to assemble the best possible audio system for your vehicle, visit your local specialist mobile enhancement retailer and ask about using Class AB amplifiers. Yes, you’ll need to find room for them in your vehicle, but the amazing clarity and detail they provide is well worth the effort.

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

Tools of the Trade – The RTA

Real Time Analyzer

Our series on the tools that are important to test and configure car audio system upgrades moves to the topic of the real-time audio analyzer, also known as an RTA or spectrum analyzer. This important tool helps installers measure the acoustic response of your mobile audio system, and it can be a fundamental component in testing a complex factory sound system to ensure that the integration process goes smoothly.

What Is an RTA?

Real Time AnalyzerIn the simplest of descriptions, an RTA tells the technician how loud specific audio bands are relative to one another. Depending on the resolution of the RTA, the bands may be divided into full octaves, half-octaves, third-octaves (the most popular) or, on some computer-based analyzer solutions, as fine as 1/48th of an octave. For an audio system to sound realistic and believable, the transition from band-to-band (depending on the resolution) needs to be smooth and free of peaks or valleys that can detract from the listening experience.

RTAs can be used with a microphone for acoustic measurements of your system, or they can be used with an adapter to measure the output of a factory radio or amplifier, so your installer will know if an equalizer or interface is required to make your system sound its best.

Real Time AnalyzerIf you’re thinking to yourself that you’ve seen something like this before, some radios and under-dash equalizers had spectrum analyzers built into them many years ago.

Types of RTAs Found in Car Stereo Shops

When you’re shopping for a retailer to upgrade the audio system in your car or truck, one of the things we recommend is that you ask for a tour of their facility. During that tour, feel free to ask about the tools they use. When it comes to RTAs, they may use a classic stand-alone solution like the older AudioControl SA-3055 or a modern computer-based interface like the AudioControl DM-RTA or Audison bitTune.

Real Time Analyzer

Some computer-based solutions allow for more complex measurements than a stand-alone solution can produce, but at the very least, knowing that your technician has a way to look at the acoustic performance of your vehicle is paramount.

Tuning Digital Signal Processors

Real Time AnalyzerWe’ll make it abundantly clear: If you’re having a digital signal processor added to your vehicle, your technician needs to have an RTA. In the same way that you can’t look at a glass of water and tell what temperature it is, an installation technician can’t listen to an audio system and know which frequencies need to be adjusted and by exactly how much. The RTA is the car audio equivalent of a thermometer for that glass of water.

Before you commit to an audio system upgrade, make sure that your local mobile enhancement retailer has the tools required to complete the task efficiently and reliably and the training needed to ensure that the proposed benefits and improvement in performance will be delivered to you, the customer.

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

Drone Telematics is Ideal for Families with Young Drivers

Young Drivers

If there’s a young driver in your family, upgrading your vehicle with a telematics system like Drone is a great way to know where they are and how they’re driving. Drone combines high-speed cellular LTE connectivity with an onboard GPS receiver to relay the exact location of the vehicle to your smartphone or the Drone website. You can even configure geofence notifications, so you know when the vehicle arrives at or leaves a specific location. Let’s look at how these features work to help keep parents calm when their kids are driving the family car or truck.

GPS-Based Vehicle Locating

The X1-MAX, X1R and DR-5400 Drone modules include an integrated GPS receiver antenna. Location information is visible within the DroneMobile app on your iOS or Android smartphone or on the Drone website. The GPS locating capability is impressively precise. This accuracy lets you know which side of a driveway you’re parked on or exactly where the car is in a mall parking lot.

If your son or daughter is out with the car, you can check their location and speed while they’re on the move. If you expect them home at 10:30, you can see whether they’ve left their friend’s house or movie theatre, or if they’re just around the corner.

Young Drivers
When you use the Drone app to find the location of a vehicle, you can click on the icon to see how fast the car is traveling.

Geofences Deliver Instant Alerts

A lot of families allow their kids to use the family vehicle to go to work at a part-time job. By logging into the Drone website, you can create alerts based on an address or a geographic area on a map. The website allows you to set these warnings (called geofences) based on a radius around the chosen location or using a rectangle or adjustable polygon. Another option is to use the POI (Point of Interest) feature to set an alert. You can enter the address of a business or someone’s house, and the Drone system will let you know when the vehicle arrives at or leaves that location.

Young Drivers
Using the POI feature on the Drone web interface, any time the vehicle enters this geofenced area, family members with DroneMobile on their smartphone will get an alert.

As you can see from the above screenshot, this family has configured the system to let them know when their son arrives at the drugstore where he works. This information will also be recorded in the Activity Log so that it can be reviewed later.

Young Drivers
When the vehicle arrives at the geofence location, the DroneMobile app pushes an alert to the user’s smartphone.

Speed Warnings Promote Safety

You can always click on the Location tab, then click on the vehicle icon to see how fast it is traveling. Likewise, you can configure the system to send an alert to your smartphone if the vehicle exceeds a preset speed limit.

Young Drivers
You can configure the Drone system to send you an alert anytime the vehicle exceeds a preset speed. These alerts can provide insight into how your child is driving.
Young Drivers
A notification that the vehicle has exceeded the speed limit you configured on the Drone website.

The Curfew Alert feature is another way to monitor the use of your vehicle. Once you’ve configured a start and stop time, the system will send a notification if the vehicle moves during that time period. There’s no way to sneak out at night with the car when this is activated.

Young Drivers
You can configure the start and end times for Curfew Alerts in the Drone web interface.

Drone Reduces Parent Stress

Most of us trust our children to take care of our vehicles. That doesn’t mean that we don’t worry when they’re driving. With Drone on board, we can check their location and speed as often as we want. Visit your local authorized Drone retailer to have the hardware installed in your vehicle, then choose from the Premium, Premium Plus or Ultimate service plan packages. You can learn more about the fantastic features of Drone by visiting their website, Facebook page, Instagram page and Twitter, or their YouTube channel.

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, PRODUCTS, Remote Car Starters Tagged With: DroneMobile

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