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HD Radio + Sirius Ready
Built-in Bluetooth
Pandora App
USB/Aux Inputs
iPod/iPhone Control
Remote Control
Disc Playback
Audio Section
Display Features

HD Radio + Sirius Ready

Built-in HD Radio: With the built-in HD Radio tuner, you can receive digital AM/FM broadcasts from local stations where available. HD Radio technology significantly improves audio quality and reception, as well as includes information such as artist name and song titles or traffic news, viewable on the receiver's display. HD Radio Technology will deliver high-quality digital sound. AM digital will have FM-like quality in stereo, while FM digital will have CD-like quality sound with static free and clear reception. HD Radio is the system for digital AM and FM broadcasting in the U.S. More than 2,000 radio stations are broadcasting their primary signals in digital HD Radio technology, as a free service. Go to HDRadio.com to check for HD Radio stations in your area.

Multicasting: In addition to conventional broadcasts, with HD Radio broadcasting, it is possible to choose from up to 8 multicast programs (HD1 to HD8 and analog). There are also data programs for each program.

Text Display: AM/FM digital stations can offer text and data such as artist names and song titles. The built-in HD Radio tuner displays song title, artist and station information on the display of the JVC KW-HDR81BT.

iTunes Tagging: It is possible to save the song's information (tag) from a HD Radio broadcasting station to your USB-direct connected iPod/iPhone. The songs will show up in a playlist called "Tagged" in iTunes the next time you sync your iPod/iPhone. Then you can directly buy the songs you want from the iTunes Music Store. You can "tag" up to 50 songs. Your iPod/iPhone must have at least 50MB of free space to "tag" and transfer songs. iTunes 7.4 or later is required to purchase "tagged" songs.

Analog Broadcasts: In addition to HD AM/FM stations, the KW-HDR81BT can also receive conventional analog AM/FM broadcasts.

Digital/Analog Tuning: You can setup the KW-HDR81BT to search both analog and digital radio stations, only HD Radio stations, or analog radio stations only.

Digital/Analog Presets: You can set up to 18 FM and 6 AM digital/analog presets stations as presets (HD Radio multicast channels can also be preset). Presets can be set manually or automatically, using Strong-station Sequential Memory (SSM).

Radio Timer: You can tune into a preset station at a specific time regardless of the head unit's current source. You can activate the Radio Timer once, daily, or turn it completely off.

Mono Mode: If an analog FM stereo broadcast is hard to receive, you can manually switch the tuner to Mono operation.

IF Filter: You can also switch the analog tuner's IF filter to Wide or Auto to increase/decrease the sensitivity.

US/European Tuning: You can set the built-in AM/FM tuner between US standard and European tuning spacing.

Satellite Radio Ready: There are several options for connecting an optional XM or SIRIUS Satellite Radio receiver to this receiver:

• SIRIUS: The JVC KW-HDR81BT is compatible with the SiriusConnect Universal Tuner and Plug & Play Dock.
  • SiriusConnect Tuner: Connect the optional SC-C1 SiriusConnect vehicle tuner (item # 607SCC1) and the JVC KS-SRA100 SIRIUS adapter (item # 105KSRA100) - package # 700SIRJVC1, sold separately.
  • SiriusConnect Dock: Select dock-and-play and portable Sirius radios can be controlled using the JVC KS-SRA100 SIRIUS adapter (item # 105KSRA100) and the SC-VDOC1 dock (item # 607SCVDOC1) - package # 700JVCSIRP, sold separately.
• XM: A portable XM satellite radio tuner can be connected to the head unit's auxiliary input.

Note: A subscription is also required to receive satellite radio programming from SIRIUS or XM.

Built-in Bluetooth

USB Bluetooth Adapter: The JVC KW-HDR81BT comes supplied with a USB Bluetooth Adapter (KS-UBT1) which is pre-installed into the head unit's rear-panel USB input, making the KW-HDR81BT Bluetooth 2.1 + EDR certified. The KW-HDR81BT supports Bluetooth hands-free communication and wireless audio streaming. The USB Bluetooth Adapter (KS-UBT1) must remain plugged into the rear-panel USB port, or can also be installed in the head unit's front-panel USB port.

Bluetooth Technology: Bluetooth is a two-way wireless communication system allowing you to make and receive phone calls wirelessly from your Bluetooth enabled mobile phone, as well as wirelessly stream audio from your Bluetooth enabled portable music player using the JVC in-dash multimedia receiver. Bluetooth wireless technology operates on a 2.4GHZ frequency band within a range of approximately 10 meters (about 33 feet).

Bluetooth Profiles: In order to use Bluetooth wireless technology, your phone must also be Bluetooth compatible and be able to interpret certain profiles. This unit is compatible with the following Bluetooth Profiles:

• Hands-Free Communication: HFP (Hands Free Profile), OPP (Object Push Profile), PBAB (Phone Book Access Profile).
• Audio Streaming: A2DP (Advanced Audio Distribution Profile), AVRCP (Audio/Video Remote Control Profile).

Pairing: Your Bluetooth enabled mobile phone or digital audio player must be paired with KW-HDR81BT before hands-free & wireless operation. You can register up to five Bluetooth enabled devices with the JVC head unit. You can keep two phones connected at all times (only one can be used during a call).

Note: Due to the differences in Bluetooth technology, some Bluetooth enabled devices may be incompatible, function improperly, or may not support all features when used with the JVC head unit. See JVC's Bluetooth compatibility chart for a complete list of compatible Bluetooth enabled devices.

External Microphone: The JVC KW-HDR81BT includes an external microphone to carry on your side of your phone conversation and voice command dialing. The external wired microphone offers improved audio quality versus an integrated microphone, so you can be heard easier over noisy traffic and road noise. You can adjust the level of the microphone without affecting the other sources. The external microphone features an attached 12' cable terminated by a right-angle 3.5mm connector which plugs into the mic input on the rear-panel of the head unit. The microphone offers an integrated mounting bracket which can be clipped to your vehicle's sun-visor or taped to your dash. The external microphone measures 0.525" (diameter) x 1.485" (depth). This unit does not offer an integrated front-panel microphone.

Bluetooth Hands-Free Communication: The head unit supports Bluetooth hands-free communication for your Bluetooth enabled mobile phone. The front-panel controls of the KW-HDR81BT can be used to dial a number, answer an in-coming call, or end a call. The unit also features an external microphone (featuring adjustable gain), so you can carry on your side of the conversation while listening to the caller through your vehicles speakers (front or all). During a conversation, you can switch between the Private Mode (talking directly on your cell phone) and the Hands Free Mode. 

• Answering A Call: When a call comes in, a ring-tone will be heard through your vehicle's speaker, the head unit's display will flash (Ring Color), and the caller's name or phone number will be displayed. You can answer the call from the KW-HDR81BT's front-panel controls, or setup the head unit to automatically answer the incoming call. You can adjust the head unit's ring color from the unit's 29 preset colors or 30,000 custom colors.
• Dialing A Number: Using the KW-HDR81BT, you can dial a phone number in one of the following ways:
  • Entering a Phone Number: Allows you to directly dial a phone number up to 32 digits from the head unit's front-panel rotary dial.
  • Speed Dialing: You can store up to 6 contacts in the memory of this head unit for speed dialing.
  • Phone Book: You can dial by using the downloaded phone book. You can download phone book data from your cell phone to the KW-HDR81BT. If you phonebook contains a lot of contact numbers, you fast search (+/-10, 100, or 1000) through the phonebook by using the unit's control dial. You can also do an A-Z search to scroll the downloaded phonebook. Up to 5,000 numbers can be stored for each registered cell phone. Each number can be up to 32 digits long.
  • Call Log: The Call Log is a list of calls that have originated from and were received by this unit that you can dial. You can select Outgoing, Incoming, or Missed calls (up to 50 each).
  • Voice Dialing: If your mobile phone supports voice recognition, then you can dial out by voice command. Simply speak into the included microphone. 

Message Notice: The JVC KW-HDR81BT will ring and display "RCV Message" to alert you of an incoming text message from your connected Bluetooth enabled mobile phone. You will still need to view the text message from your phone, as well as create and send text messages from your phone.

Wireless Audio Streaming: The JVC KW-HDR81BT also supports wireless audio playback (AD2P) and control (AVRCP) of a Bluetooth enabled audio player or smartphone. The KW-HDR81BT will be able to control basic playback functions of your Bluetooth device's stored music; such as Play/Pause, Skip Next/Previous, and Fast Forward/Rewind. The head unit will also display your stored music's song information; such as Song and Album title. The KW-HDR81BT also supports audio streaming of music apps (such as iHeartRadio, SiriusXM, Last.fm, Rhapsody, & Slacker) , but without control or metadata. You will continue to use your Bluetooth enabled smartphone to view and control streaming music apps.

Note: When an incoming call or outgoing call is in progress from your Bluetooth enabled mobile phone, audio streaming will be paused so you can take your call. Once the call is finished, your streaming music will resume.

Pandora App

Pandora Internet Radio Control: The JVC KW-HDR81BT CD receiver lets you playback and control the Pandora Internet Radio music service that is being streamed to your Apple iPhone, Android smartphone, or BlackBerry. While providing control over the Pandora music service, the KW-HDR81BT also displays Artist, Album, and Song information. You can select Pandora stations from your station list; you can sort the station list by date or alphabetically (A-Z). You can also skip song tracks within a station. In addition, you can also give songs a thumbs up/down and bookmark songs/artists.

Note: Access to the Pandora service will depend on the availability of a cellular and/or WiFi network for purposes of allowing your iPhone or smartphone to connect to the Internet. Pandora is not supported in Canada and only available in the United States.

Pandora App for iPhone: The JVC KW-HDR81BT lets you playback and control Pandora Internet Radio streamed to  your connected Apple iPhone, via the USB/iPod connector cable (included with your iPhone). To access Pandora you must have an Apple iPhone (iOS3 or later) with the latest version of the Pandora App from the Apple's iTunes App Store. Your iPhone will need an active Data Plan account with connection to the Internet via 3G, EDGE, or WiFi. You will also need a Pandora music service account.

Pandora via Android or BlackBerry: The JVC KW-HDR81BT also lets you playback and control Pandora Internet Radio streamed from your Android or BlackBerry smartphone, via Bluetooth (no hard-wired connection required). Your Android or BlackBerry smartphone must have the latest version of the Pandora App from the Android Market or the BlackBerry App World. Your Android or BlackBerry smartphone must also be Bluetooth A2DP/AVRCP/SPP certified and will need an active Data Plan account with connection to the Internet via 3G, EDGE, or WiFi. In addition, you will need an active Pandora music service account.

USB/Aux Inputs

Dual USB Ports: The JVC KW-HDR81BT features a front-panel USB 2.0 type-A port (behind a sliding cover) and a rear-panel USB 2.0 type-A port (attached to a 45" pigtail) for connection of USB mass-storage class devices (such as a USB thumbdrive or digital audio player). The USB ports enable audio playback and control of MP3, WMA, & WAV audio files stored on portable USB mass-storage class devices. Both of the USB terminals can be connected to USB devices at the same time. USB portable audio players that can be charged via USB will be charged when plugged into the CD receiver's USB port (5V/1A), and the vehicle's ignition switch is set to ACC or On. You cannot connect a USB device via a USB hub or Multi-Card Reader to this unit.

Note: The rear-panel USB port comes with the KS-UBT1 Bluetooth adapter installed. This Bluetooth adapter must remain installed for Bluetooth functionality. It can be removed to allow connection of a second USB (MSC) device.

Drive Change Mode (for BlackBerry and Android): JVC's Drive Change Mode lets you connect your Android or BlackBerry smartphone (that uses an external memory card) directly to the head unit, via USB. Drive Change Mode will let you switch between your Android or BlackBerry smartphone's internal and external memory (such as microSD Card), so you can listen to music stored on either memory. You'll continue to be able control basic playback functions; such as folder/file search, play/pause, and skip next/previous; regardless of memory type.

Playable Files: The JVC KW-HDR81BT supports the following types of MP3/WMA/WAV files loaded onto a USB mass storage class device. The USB device must be formatted in FAT 12/16/32. The CD receiver can support up to a total of 20,000 files and 2,000 folders (999 filer per folder).

ID3/WMA Tags: The unit also supports ID3 and WMA tags for display of album and artist information. The unit can display up to 128 characters.

Track/Folder List: The Track/Folder List displays a list of MP3/WMA/WAV folders and tracks on a connected USB memory device, so you can easily access your music.

Quick Search: You can search for your MP3, WMA, or WAV music tracks alphabetically (A-Z) or numerically (0-9).

Playback Modes: In addition to Normal playback, you can select from Repeat and Random playback modes.

• Repeat: Track Repeat (plays the current track repeatedly), Folder Repeat (plays all tracks of the current folder repeatedly), Off (cancels repeat function)
• Random: Folder Random (plays all tracks of the current folder, then the tracks of the next folder in random), All Random (plays all tracks of the current USD device at random), Off (cancels random function)

USB Charging: The head unit's USB connection provides 1A of current to power and charge your connected USB mass storage class device when your vehicle's ignition switch is set to the 'ACC' or 'On' position.

Front-Panel Auxiliary Input: A front-panel stereo minijack is provided to allow the connection of a portable audio source. Simply connect your portable digital music player to the unit's front-panel auxiliary input, and you can listen to the audio from the portable player through the speakers in your mobile audio system. The unit's front-panel auxiliary input can be turned On or Off.

Optional Input Adapter: An optional JVC Line Input Adapter (469JVCRCA or 257KSU58, both sold separately) may be used to provide an additional auxiliary audio input on this unit. This feature allows you to connect a portable audio player, such as a portable MP3 player, to this unit as an additional audio source. The adapter connects to the proprietary J-port on the rear-chassis of the head unit.

iPod/iPhone Control

iPod/iPhone Direct: The JVC KW-HDR81BT's front-panel or rear-panel USB port can acts as an iPod/iPhone high-speed direct connection when used with the USB/iPod cable that came with your iPod/iPhone. An additional iPod cable is available (469USBPOD, sold separately) so you can leave one at home and one in the car. If you have an iPod nano (7th gen), iPod touch (5th gen), or iPhone 5; use the Lighting-to-USB cable that came with your Apple device to connect to the head unit. Using either cable allows audio playback, music navigation, information display, and charging of select iPod/iPhone models from the JVC in-dash head unit.

iPod DAC Bypass: The USB connection allows your iPod/iPhone's stored music to be loaded instantly to the head unit and sound quality to be maximized through the head unit's 24-bit D/A converter, allowing for a Signal to Noise ratio up to 98dB. The JVC head unit supports audio playback of music, podcasts, audiobooks, and music apps stored on your iPod or iPhone.

iPod/iPhone Control: You can choose to operate your iPod/iPhone through the JVC head unit's front-panel controls, from its clickwheel/touchscreen, or via a streamed app from your iPhone.

• Head Unit: From the head unit's front-panel controls you can search for music by Playlist, Artist, Album, Song, Podcast, Genre, Composer, and Audiobooks. Once a Playlist or Category is selected, you can search for your iPod's music alphabetically (A-Z) or numerically (0-9). The KW-HDR81BT also supports Repeat (file/all) and Random (album/all) playback functions of your iPod/iPhone.
• iPod: You can choose to navigate your iPod or iPhone's stored music from its clickwheel or touchscreen, like you are accustomed to during normal usage.
• External (App Mode): External Mode lets you enjoy audio content from your downloaded music Apps (such as iHeartRadio, SiriusXM, Last.fm, Rhapsody, & Slacker streamed to your Apple iPhone, through the JVC KW-HDR81BT. You will continue to use your iPhone's touchscreen to navigate and view your apps; the head unit will only display the clock and "EXT Mode".

Note: Access to your iPhone's downloaded application will depend on the availability of a cellular and/or WiFi network for purposes of allowing your iPhone to connect to the Internet.

iPod Display: The KW-HDR81BT will display your iPod/iPhone's music file information, when in Head Unit and iPod mode (not in External mode), or listening to Pandora Internet Radio. The head unit can display Track number, Elapsed playing time, Artist name, Song title, and Album label.

Auto Drive Router App: Auto Drive Router is a free JVC app from iTunes for your iPhone (iOS 4.2 or later). This app can be controlled from the JVC KW-HDR81BT, when your iPhone is connected to the head unit's USB port. Auto Drive Router lets you record your traveled routes and store recorded data on your iPhone, using Google Maps. E-mails with map data can also be sent quickly and easily from your iPhone, letting others know where you are or where you want to meet. You can start and stop when Auto Driver Router records your routes using the in-dash CD receiver's controls. You can also send an email template to your predetermined contacts directly from the receiver's controls. You can do all this while still listening to stored music or streamed music from your iPhone on the JVC KW-HDR81BT.

• Drive Data: This function allows you to record routes and store them as data in your iPhone, enabling you to easily retrieve data just by selecting a route from the Saved Route List. When data is called up on your iPhone, the route being taken will be shown as a single line on the map in different colors to indicate how fast you were traveling. It is also possible to zoom in and out of maps on your iPhone, as well as see the speed and altitude of routes in a graph format on the iPhone's touchscreen. By connecting an iPhone with this app installed to the KW-HDR81BT, you can record routes via the control knobs and buttons of the in-dash head unit.
• Here I AM: When you select the "Here I Am" function on the Auto Drive Router app, a flag showing "Here I Am?" will appear on the on-screen Google Map of your iPhone to indicate your current location. And by using a default template, an e-mail will also be created instantaneously for delivery of the map to multiple recipients. The flag can also be placed in different locations on the on-screen map of the iPhone with the "Here I Am" function being used to e-mail changes in meeting spots. When your iPhone is connected to the JVC CD receiver, your email templates can be selected and sent directly from the head unit.

Note: The JVC head unit must be set to External/App mode. All visual map data will be displayed on your connected iPhone (not the JVC head unit). You can only control a specific number of functions from the JVC head unit. Not compatible with iPad or other iPod models.

iPod Charging: The head unit's USB connection provides 1A of current to power and charge your connected iPod/iPhone when your vehicle's ignition switch is set to the 'ACC' or 'On' position. This unit does not charge the iPad.  If your iPod/iPhone has no initial battery charge, then the unit will not recognize it.

iPod Compatibility Chart: The JVC KW-HDR81BT is "Made for iPod/iPhone" compatible and supports the following iPod/iPhone model features (as of 9/25/2012):

Note: Apple iPod/iPhone software updates may change functionality results. If you download a newer software version, you may need to reset the head unit and your iPod/iPhone to regain functionality. If this doesn't work, you may need to wait until a newer software update is available.

Remote Control

Wireless Remote Control: The KW-HDR81BT comes supplied with a wireless remote control (RM-RK52). The remote contains Attenuator, Sound, Source, Tracking, and Volume functions. The remote operates off of a single CR2025 3V Lithium-cell battery (included).

Smart Remote App for Android: JVC's Smart Remote App lets you view the current status and perform simple gesture control of the JVC head unit from your Android smartphone. The Smart Remote App uses Bluetooth to communicate between your Android smartphone and the JVC car receiver. The JVC head unit will auto connect to the Smart Remote App when your Smartphone is in range. The Smart Remote App is specifically designed for easy gesture control operation while driving, so driver and passenger can access information with ease from the Android Smartphone. With the Smart Remote App, passenger and driver can check current playing song details or other car stereo information.

• Information Display: The JVC Smart Report App will display Song information such as Song title, Artist name, and Album label from a connected USB mass storage class device on your Android Smartphone. It also displays AM/FM station frequency # and name. In addition, it provides source, EQ, and playback mode indicator icons.
• Gesture Control Operation: The JVC Smart Report App lets you use finger gesture commands on your Android smartphone to control the playback of the JVC head unit. This type of gesture control is designed to operate the JVC head unit from your smartphone without having to look at your smartphone. Gesture control operations include Finger tap, Finger hold, Finger click, Finger swipe (right/left/up/down), and Finger curve (right/left/up/down).

Note: The free JVC Smart Remote App can be downloaded from the Android Market onto your compatible Android smartphone. requires that your Android smartphone have Android OS 2.1, 2.2, or 2.3 installed; as well as Bluetooth SPP support.

Steering Wheel Remote Compatibility: The head unit features an OEM steering wheel remote control input wire (blue/yellow) within the included wiring harness that lets you keep your vehicle's factory radio steering wheel remote controls when used with an optional steering wheel audio control adapter (sold separately). Please consult Crutchfield's Outfit My Car to see if your vehicle is compatible.

Disc Playback

Disc Compatibility: The unit features a single disc player that will playback CD-Audio, CD-Text, and finalized CD-R/CD-RW audio discs.

MP3/WMA Playback: The KW-HDR81BT can play MP3/WMA (5-320 kbps) music files that have been recorded on CD-R/CD-RW discs. The disc must be recorded in one of the following formats: ISO 9660 Level 1/Level 2, Joliet, or Romeo. The CD receiver can support up to a total of 20,000 files and 2,000 folders (999 filer per folder).  The unit also supports IDTag3 (version 1.0, 1.1, 2.2, 2.3 or 2.4) for album and artist information from MP3 or WMA files.

Track/Folder List: The Track/Folder List displays a list of MP3/WMA folders and tracks on a loaded CD, so you can easily access your music. The Track/Folder List will also display the list of track titles on a CD Text disc.

Quick Search: You can search for your MP3, WMA, or WAV music tracks alphabetically (A-Z) or numerically (0-9).

Random/Repeat Modes: The JVC KW-HDR81BT offers the following Repeat and Random playback modes for your audio CDs.

• Repeat: Track Repeat (plays the current track repeatedly), Folder Repeat (plays all tracks of the current folder repeatedly), Off (cancels repeat function)
• Random: Folder Random (plays all tracks of the current folder, then the tracks of the next folder in random), All Random (plays all tracks of the current disc at random), Off (cancels random function)

Disc Resume: If you change the source, playback also stops (without ejecting the disc). Next time you select CD for the playback source, the disc will start from where it has been stopped previously.

Off Insert/Eject: A CD disc can be inserted or ejected with the power off. When a disc is inserted with the power off, the unit will automatically power up and begin playback.

Disc Protection: If the ejected disc is not removed within 15 seconds, the disc is automatically inserted again into the loading slot to protect it from dust. The source will change to CD, and the disc will begin playback, even if you have another source selected at the time.

Mounting: For proper disc playback you must install the unit within 30-degrees of horizontal.

Audio Section

24 Bit D/A Converter: The JVC KW-HDR81BT utilizes a 24-bit digital to analog converter for superior sound quality.

MOSFET Amplifier: The KW-HDR81BT is equipped with a MOSFET amplifier. Compared to conventional power supplies, the MOSFET amplification circuit is smaller and more efficient, and it delivers increased power with less distortion and absolutely zero on/off switching noise. More power means louder and cleaner music at higher volumes because you're not pushing the limits of the amplification circuit.

CEA2006 Compliant: The power specifications for the KW-HDR81BT are compliant with the CEA2006 Mobile Amplifier Power Testing and Measurement standards from the Consumer Electronics Association (CEA). These standards were developed as a way to equitably compare power specs from model to model and between manufacturers. The power output specs for the KW-HDR81BT are as follows:

• CEA2006 Specs: 20 watts RMS x 4 channels (at 4 ohms, 20Hz-20kHz, 1% THD-N)
• Maximum Power Output: 50 watts x 4 channels (200 total watts)

Amplifier Gain Control: When you are using the KW-HDR81BT with factory speakers (or those rated to less than 50 watts peak), the Amplifier Gain Control can limit the amount of power being sent to those speakers. When the Amp Gain Control is set to "low," the volume control ranges from 0 (minimum) to 30 (maximum). When using speakers rated higher than 50 watts peak, you can set the Amp Gain Control to "high," and the volume control will range from 0 to 50.

Volume Adjust: The input level of each source (other than FM) is adjustable relative to the FM radio volume, so there isn't a significant volume difference when changing sources. Each source is individually adjustable from -5 to +5.

Pro EQ: The KW-HDR81BT is equipped with JVC's Pro EQ. The integrated equalizer offers 7 preset sound modes (Flat, Natural, Dynamic, Vocal Boost, Bass Boost, User) suitable for the music genre of your choice. The User mode allows you to manually adjust the head unit's 3-band parametric EQ (Frequency, Level, and Q-Factor).

Source Link EQ: This feature allows you to store Pro EQ bass, middle and treble tone settings for each source (CD, AM/FM, Aux, USB, iPod, Bluetooth, and Pandora).

Loud (Loudness): This feature boosts low and high frequencies to produce a well-balanced sound at a low volume level. You can turn this feature on or off.

2.5V/6CH Preamp Outputs: The KW-HDR81BT is equipped with three pairs of 2.5V preamp outputs (Front, Rear, SW). If you wish to use the subwoofer output, you must turn it on in the menu.

Subwoofer Controls: The unit has a dedicated subwoofer preamp output. You can adjust the head unit's subwoofer level between 0 and 8 (separate from the main volume level). You can also adjust the low-pass filter and activate a high-pass filter:

• Low-Pass Filter: You can set the cutoff frequency of the low-pass filter at 55Hz, 85Hz, or 120Hz.
• High-Pass Filter: You can also activate a high-pass filter (fixed at low-pass filter frequency) for the unit's front & rear channels (speaker- or preamp-level), so low frequency signals are cut off from your system's front & rear speakers.

Key-Touch Tone: The in-dash head unit provides an audible beep to confirm button operation. This function can be turned On or Off.

Display Features

Variable Color LCD & Key Illumination: The JVC KW-HDR81BT features 29 color presets for the LCD and button illumination. You can choose one of these color presets or select the ColorFlow mode which scrolls through all 29 color presets. Additionally, there is a User preset, allowing you to individually adjust the intensity of Red, Green, and Blue from 0 to 31; resulting in approximately 30,000 custom color options. The chosen color preset or custom color can be applied to the display panel and the backlighting for all the buttons except the eject and display buttons (they remains red). You can choose to use the same color for the LCD display and button illumination, or use a separate color for each one. You can also select a different color for daytime and nighttime in regards to the unit's LCD and button illumination.

Brightness: The unit offers an adjustable display and button illumination brightness level (0-31) for day and nighttime driving.

Display/Button Illumination Dimmer: The display/button illumination dimmer can be set to Off (normal brightness at all times), On (display/button illumination is always dimmed), or Auto (display dims when 12-volts is applied to the orange/white illumination lead).

2-DIN Chassis: The JVC KW-HDR81BT has a 2-DIN chassis (also known as Double DIN), and will fit in many vehicles with a large dash opening. The unit can be ISO-mounted using factory brackets, or Euro-mounted using the supplied mounting sleeve. As always, please consult Crutchfield's Outfit My Car to verify fit with your vehicle.