Introduction to Car Stereo
Features and Connectivity in Aftermarket Receivers
Make your drive more enjoyable with an aftermarket receiver!
Make your drive more enjoyable with an aftermarket receiver!
Car Audio Dashboard Basics
There are a number of names for in-dash car stereos: head unit, tuner, controller and receiver. Many times these names are used interchangeably, which creates confusion and can be incorrect.
• Car Stereo is a generic term that can mean the in-dash unit or the whole audio system.
• Head unit is a universal name for any in-dash stereo, including tuners, controllers, and receivers.
• Controllers are head units that lack an AM/FM tuner.
• Tuners are head units without built-in amplification.
• Receivers are head units with built-in amplification (for example, 4 channels x 20 watts).
While in-dash factory or OEM stereos vary widely, most aftermarket head units are receivers with built-in amplification. Thus, for simplicity and consistency with manufacturer product descriptions, the Car Electronics Resource Center refers to in-dash factory head units as stereos and in-dash aftermarket stereos as receivers.
• Car Stereo is a generic term that can mean the in-dash unit or the whole audio system.
• Head unit is a universal name for any in-dash stereo, including tuners, controllers, and receivers.
• Controllers are head units that lack an AM/FM tuner.
• Tuners are head units without built-in amplification.
• Receivers are head units with built-in amplification (for example, 4 channels x 20 watts).
While in-dash factory or OEM stereos vary widely, most aftermarket head units are receivers with built-in amplification. Thus, for simplicity and consistency with manufacturer product descriptions, the Car Electronics Resource Center refers to in-dash factory head units as stereos and in-dash aftermarket stereos as receivers.
How to Determine If You Need a New ReceiverTo determine if your vehicle needs a new receiver, consider the list of features and technologies below. If your existing stereo lacks one or more of these features, a new receiver may be the perfect solution.
1) Portable Media Devices - Does your current stereo accept direct the connection of portable media devices such as MP3 players and USB thumb drives? If your stereo does not connect to portable devices, consider upgrading to an aftermarket receiver. 2) Bluetooth Hands-free for Cell Phones – Does your current stereo have integrated Bluetooth hands-free calling? Hands-free calling is convenient, safe, and in many states, the law. 3) Bluetooth Audio Streaming – Does your current system allow wireless audio streaming? Many receivers support wireless streaming via an A2DP Bluetooth connection. 4) Navigation – Does your head unit have built-in navigation, and are the maps up-to-date? Many receivers offer integrated navigation with touch screens and updateable map databases. 5) Multimedia – Does your current head unit support DVD-Video playback or rear seat entertainment? Many receivers support playback of physical DVD discs and MP4 digital video content. Many also allow simultaneous operation of two content sources, which allows video outputs to route a movie to rear seat screens, while the driver and front seat passenger enjoy music. 6) Upgraded Sound – Does your music sound good? An aftermarket receiver is the foundation of a sound system upgrade. Many receivers offer features like digital-to-analog converters (DACs), on-board Digital Signal Processing (DSP) equalization, and high voltage preamp audio outputs. All of which, help deliver better sounding quality to the rest of your system. |
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In-Dash Receiver Features
Playing Digital Music – Receivers offer a variety of options for playing digital music in the car. Receiver features that make it easy to play digital music include:
•Compressed Audio Format Support – Most aftermarket CD receivers support MP3 playback on a CD-R disc. Many units also support popular file formats like AAC (default iTunes format) and WMA. Many receivers also support digital audio file formats from other media storage devices like SD cards, USB thumb drives, and portable hard drives.
•CD and DVD-Video Playback – In addition to CDs, many receivers play commercially available DVDs. Video content can be output to other screens without a separate DVD player. For more information about In-Dash Video, check out the Introduction to Car Video Buyer’s Guide.
•iPod Connectivity and Control – iPod connectivity is a common feature in receivers, and many support iPhone and iPad connectivity as well. Connection occurs via a 30-pin docking connector at the bottom of the iPod. An added benefit is that it charges the iPod/iPhone/iPad as well. With built-in iPod connectivity, the receiver controls the volume and playlist browsing, so the iPod can be stowed, reducing driver distraction.
•Connectivity to A/V output of Smartphones – Many receivers offer Smartphone connectivity through a USB connection, docking connector and/or the headphone jack, allowing the receiver to accept video and audio signals from the phone. iPhone has a standard bottom 30 pin dock connector. Many Andriod-based phones use a micro USB. Display of video content, screen share with navigation apps or other functions on the Smartphone are enabled using these connection approaches with compatible receivers and supported phones.
•MirrorLink – MirrorLink (a.k.a. ‘Terminal Mode’) is a new connectivity technology that brings the Smartphone experience to the receiver’s screen by acting as a remote control terminal. MirrorLink allows the receiver to control the phone’s apps and features via the receiver’s touch screen. While connected, the receiver’s screen mirrors the phone’s screen in a ‘safe driver’ mode intended for the car. Receivers and phones both require MirrorLink capability and connect via USB.
Satellite Radio – Many receivers are “Sirius XM Ready” or “Satellite Radio Ready.” A dedicated satellite radio tuner (purchased separately along with a Sirius XM subscription) receives the Sirius XM satellite signal and sends it to the receiver. The receiver controllers the satellite radio functionality, so no additional display/control panel is necessary.
Bluetooth Enabled - Many receivers offer Bluetooth connectivity. Some receivers support Bluetooth A2DP streaming audio profile along with AVRCP control profile. Once a Bluetooth-enabled device is paired with the receiver, the receiver connects wirelessly to the digital music stored on the device and controls the basic functions of play/pause, previous/next song and volume using the receiver’s controls or touch screen. The benefit of streaming music over an A2DP Bluetooth connection, instead of a wireless FM transmitter is better sound quality.
•Verify whether Bluetooth is built-in to the receiver or it is “Bluetooth-ready.” If it is Bluetooth-ready, it requires a separate purchase of a hideaway Bluetooth module from the same manufacturer. The module connects with a data cable to the receiver to provide Bluetooth functionality.
•For more information about Bluetooth and streaming audio, check out the Bluetooth Hands-Free Device Tips Category Guide.
AUX Inputs - Most receivers offer one or more auxiliary (AUX) inputs. These inputs are found on the front panel or on the wiring harness on the back of the receiver. These inputs allow the receiver to connect to any audio device with either a 3.5mm or audio RCA connection, such as a Smartphone, MP3 player, laptop, tablet, or game system.
Advanced Sound Quality – Many receivers have advanced features that allow you to fine-tune audio signals before they are sent to amplifiers, speakers, subwoofers, and the rest of the stereo system. These features include upgraded digital-to-analog converters (DACs), integrated digital equalization, time correction, and digital crossovers. These features ensure a high quality audio signal, which ultimately determines how good the music or media sounds.
Illuminate and Display Information – Many receivers have screens with illuminating color choices that can match factory dash lighting. This makes information on the receiver easy to see. This feature is often programmable for user preferences, such as displaying time, album art, or even selecting a background color and custom screen saver graphic.
Added Security - Many Single-DIN sized receivers have detachable face panels. Removing the face panel is a simple and smart theft deterrent option, and most face panels are small enough to carry with you.
•Compressed Audio Format Support – Most aftermarket CD receivers support MP3 playback on a CD-R disc. Many units also support popular file formats like AAC (default iTunes format) and WMA. Many receivers also support digital audio file formats from other media storage devices like SD cards, USB thumb drives, and portable hard drives.
•CD and DVD-Video Playback – In addition to CDs, many receivers play commercially available DVDs. Video content can be output to other screens without a separate DVD player. For more information about In-Dash Video, check out the Introduction to Car Video Buyer’s Guide.
•iPod Connectivity and Control – iPod connectivity is a common feature in receivers, and many support iPhone and iPad connectivity as well. Connection occurs via a 30-pin docking connector at the bottom of the iPod. An added benefit is that it charges the iPod/iPhone/iPad as well. With built-in iPod connectivity, the receiver controls the volume and playlist browsing, so the iPod can be stowed, reducing driver distraction.
•Connectivity to A/V output of Smartphones – Many receivers offer Smartphone connectivity through a USB connection, docking connector and/or the headphone jack, allowing the receiver to accept video and audio signals from the phone. iPhone has a standard bottom 30 pin dock connector. Many Andriod-based phones use a micro USB. Display of video content, screen share with navigation apps or other functions on the Smartphone are enabled using these connection approaches with compatible receivers and supported phones.
•MirrorLink – MirrorLink (a.k.a. ‘Terminal Mode’) is a new connectivity technology that brings the Smartphone experience to the receiver’s screen by acting as a remote control terminal. MirrorLink allows the receiver to control the phone’s apps and features via the receiver’s touch screen. While connected, the receiver’s screen mirrors the phone’s screen in a ‘safe driver’ mode intended for the car. Receivers and phones both require MirrorLink capability and connect via USB.
Satellite Radio – Many receivers are “Sirius XM Ready” or “Satellite Radio Ready.” A dedicated satellite radio tuner (purchased separately along with a Sirius XM subscription) receives the Sirius XM satellite signal and sends it to the receiver. The receiver controllers the satellite radio functionality, so no additional display/control panel is necessary.
Bluetooth Enabled - Many receivers offer Bluetooth connectivity. Some receivers support Bluetooth A2DP streaming audio profile along with AVRCP control profile. Once a Bluetooth-enabled device is paired with the receiver, the receiver connects wirelessly to the digital music stored on the device and controls the basic functions of play/pause, previous/next song and volume using the receiver’s controls or touch screen. The benefit of streaming music over an A2DP Bluetooth connection, instead of a wireless FM transmitter is better sound quality.
•Verify whether Bluetooth is built-in to the receiver or it is “Bluetooth-ready.” If it is Bluetooth-ready, it requires a separate purchase of a hideaway Bluetooth module from the same manufacturer. The module connects with a data cable to the receiver to provide Bluetooth functionality.
•For more information about Bluetooth and streaming audio, check out the Bluetooth Hands-Free Device Tips Category Guide.
AUX Inputs - Most receivers offer one or more auxiliary (AUX) inputs. These inputs are found on the front panel or on the wiring harness on the back of the receiver. These inputs allow the receiver to connect to any audio device with either a 3.5mm or audio RCA connection, such as a Smartphone, MP3 player, laptop, tablet, or game system.
Advanced Sound Quality – Many receivers have advanced features that allow you to fine-tune audio signals before they are sent to amplifiers, speakers, subwoofers, and the rest of the stereo system. These features include upgraded digital-to-analog converters (DACs), integrated digital equalization, time correction, and digital crossovers. These features ensure a high quality audio signal, which ultimately determines how good the music or media sounds.
Illuminate and Display Information – Many receivers have screens with illuminating color choices that can match factory dash lighting. This makes information on the receiver easy to see. This feature is often programmable for user preferences, such as displaying time, album art, or even selecting a background color and custom screen saver graphic.
Added Security - Many Single-DIN sized receivers have detachable face panels. Removing the face panel is a simple and smart theft deterrent option, and most face panels are small enough to carry with you.
Mounting and Wiring Accessories
Factory quality fit-and-finish accessories are available to make a new receiver appear as if it were factory-installed. Additional wiring harness and antenna adapters allow the vehicle’s existing wiring to connect to the receiver’s wiring so that it performs as great as it looks.
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When to Consider Professional InstallationBefore attempting any DIY installation, assess your comfort level with the installation of electronics and mechanics of your vehicle.
Consider a professional installer if: 1) You are not comfortable disassembling vehicle interior panels. 2) You do not have a suitable work area available. 3) You do not have the recommended tools for the job. 4) You do not have the necessary installation accessories specific to your vehicle year/make/model. Many independent retail installation shops welcome jobs with products purchased on Amazon.com. Professional installers can also provide many of the installation accessories you need for jobs that are covered in this guide. Always look for a Mobile Electronics Certified Professional (MECP) installation technician to handle your most challenging installation needs. Want to purchase installation now? Find an InstallerNet card on Amazon.com that corresponds to your job type. |
THANKS: amazon.com