Pioneer DMH-W2770NEX

Touchscreen, Alexa, & Remote Control
CarPlay, Android Auto, & WebLink
Built-In Bluetooth Audio & Phone
USB & iPhone/Android Integration
AM/FM Tuner + SiriusXM Ready
Video In/Out + Camera Input
Audio & DSP Section

Touchscreen, Alexa, & Remote Control

6.75" Capacitive Touchscreen: The Pioneer DMH-W2770NEX features a 6.75" capacitive LCD touchscreen display with a resolution of 800 x 480 (RGB), for a total of 1,152,000 pixels. The capacitive LCD touchscreen is highly responsive, powerful, and very intuitive for exceptional control. The capacitive touchscreen offers multi-touch gestures like pinch-to-zoom, plus simple swipe & scroll controls - similar to your smartphone's touchscreen interface. The touchscreen display allows you to control this unit and a connected component such as an iPhone, Android smartphone, Bluetooth phone, or USB mass storage class device. Menus appear on screen for making function choices, audio adjustments, and setting up the system.

• Wallpaper: You can choose from multiple preset wallpaper backgrounds, or you can upload your wallpaper background image from a USB thumbdrive.
• Dimmer: The receiver's touchscreen display & button illumination can be dimmed manually or automatically. You can set the unit's LCD touchscreen & button illumination to automatically dim when your vehicle's headlights are turned on (this function requires that the orange/white illumination wire in the wiring harness is connected to the vehicle's headlight circuit).

Parking Brake Interlock: This unit has a parking brake interlock system that prohibits viewing of video programming and operating certain controls when the vehicle is in motion. In order to watch video or mirror content on the in-dash monitor, the vehicle must be stopped with the parking brake engaged. The head unit's light green wire must be connected to your vehicle's parking brake detection circuit. The head unit's touchscreen will display a "Caution" message, if you try to watch a video when your vehicle is in motion.

• The parking brake wire must also be connected and the parking brake engaged for certain setup functions and menu options.
• CarPlay and Android Auto do not require that the parking brake be engaged.

Front-Panel Control w/ Variable Color Illumination: In addition to the touchscreen controls, the unit includes frequently used capacitive touch buttons along the left edge of the screen. The color of the button illumination can be set to blue, red, yellow, green or white.

Alexa Voice Control: WebLink also gives you access to Amazon's Alexa digital voice assistant. By downloading the Amazon Alexa app (for Apple iOS 14.0+ and Android OS 8.0+) and the Vozsis with Alexa app (for Apple iOS 9.0+ and Android OS 7.0+) in addition to the WebLink Host app (for Apple iOS 14.0+ or Android OS 6.0+) onto your compatible iPhone or Android smartphone, you gain access to Amazon's Alexa digital voice assistant. Using Alexa is simple (just tap-and-ask); you'll need to press the "Alexa" icon on the receiver's touchscreen through the WebLink and Vozsis app before saying "Alexa,...". You can ask to play your Amazon music library and other compatible music services (such as Pandora, iHeart, etc.), call a phonebook contact or business, hear the news, check weather, control smart home devices, and more. Alexa lives in the cloud, so it's always getting smarter, adding new capabilities that are delivered to your compatible smartphone device automatically. 

• Music & Audiobooks: You can ask Alexa to select, play, and control your favorite music from Amazon Music, Pandora, iHeartRadio, TuneIn, Spotify, and SiriusXM. You can also listen to audiobooks from Audible. *The Pioneer receiver may not support all of Amazon Alexa compatible music services.
• Phone Calls: Ask Alexa to call a contact or place of business. Access to your phone and contacts must be enabled within the Alexa app.
• Traffic & Parking: You'll be able to ask Alexa for traffic information and available parking.
• Weather, News, & Sports: Check weather reports, news updates, and sport scores using Amazon Alexa and your voice.
• Smarthome Control: Use Amazon Alexa and your voice to control compatible smarthome devices, such as garage door openers and outdoor lighting.
• Questions & Answers: Amazon Alexa lets you ask questions about general things and check Wikipedia.
• Times & Alarms: Use your voice and Amazon Alexa, you can set timers and alarms.

Remote Functions: The Pioneer DMH-W2770NEX receiver comes with an IR wireless remote control, plus support for factory steering wheel control (adapter sold separately).

• Wireless Remote Control: The Pioneer DMH-W2770NEX includes an IR remote control for wireless operation of the multimedia head unit and your connected devices.
• Steering Wheel Remote Compatibility: The head unit features an OEM steering wheel remote control input on the rear of the unit 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).

Beep Tone: The in-dash head unit provides an audible beep to confirm button operation. You can turn this feature on or off.

CarPlay, Android Auto, & WebLink

Built-In WiFi: The Pioneer DMH-W2770NEX features built-in WiFi wireless connectivity specifically designed to support a cable free connection between your Apple iPhone or Android smartphone and the receiver. By supporting Apple CarPlay and Android Auto, you no longer need to worry about taking your smartphone out of your bag or your pocket before you get into your car.

• GPS Antenna: Before using CarPlay or Android Auto, make sure the included GPS antenna and vehicle speed sensing (VSS) wire are properly connected. The GPS antenna is required for Android Auto and Apple CarPlay navigation maps (including Google Maps, Apple Maps, and Waze). The GPS antenna comes with a small self-stick pad which mounts it on top of your dash inside the vehicle.
• Data Plan Required: Your iPhone or Android smartphone will need an active Data Plan account with connection to the Internet via 3G, EDGE, or LTE (4G) for CarPlay, Android Auto, Alexa, and WebLink to function. Access to CarPlay and Android online app services will depend on the availability of a cellular network for purposes of allowing your iPhone or Android smartphone to connect to the Internet. App services may not be available in all regions.

Wireless Apple CarPlay: The Pioneer DMH-W2770NEX features Apple CarPlay, the smarter and safer way to use your iPhone 5S or newer (iOS 7.1+) in the car. The Pioneer DMH-W2770NEX supports Apple CarPlay through a wireless connection using WiFi and Bluetooth (both connections must be made) or a hardwired USB connection using its rear-panel USB-A port and the supplied USB extension cable. Apple CarPlay gives iPhone users an incredibly intuitive way to make calls, use Maps, listen to music, access messages, and even control Apple HomeKit compatible devices through Siri voice recognition and the Pioneer receiver's touchscreen monitor.

• Maps: Apple CarPlay brings the power and simplicity of Apple Maps to your dashboard; complete with turn-by-turn direction, traffic conditions, and estimated travel time. You can enter a new destination or choose a favorite or recent destination using the head unit's touchscreen or by simply asking Siri. CarPlay can also predict where you most likely want to go using addresses from your email, text messages, contacts, and calendars. You can even listen to music from your Apple CarPlay device or other connected source device while using Apple Maps. If you have iOS 12.0 or newer on your iPhone with the latest version of Google Maps or Waze, you can choose to navigate via Google Maps or Waze instead of CarPlay. Google Maps and Waze do not support Siri voice control, but will have their own proprietary voice control function which has to be accessed through a touchscreen icon on the receiver.
• Phone & Messages: Via Apple CarPlay, you'll be able to make calls, return missed calls, and listen to voicemails through the Pioneer head receiver. Siri can also help you do all these things. In addition, Siri can send, read, and reply to your text messages for you; so you never have to look at your iPhone while driving.
• Music Library: Through Apple CarPlay, you can access your favorite artists, songs, and playlists from Apple Music on your iPhone using the Pioneer head unit's touchscreen. Or, just tell Siri what you'd like to listen to. The head unit's touchscreen will display song/artist information, as well as album art in the background.
• Apps: CarPlay also supports additional audio apps that you've downloaded to your iPhone for enjoying music, radio, sports, news, podcasts, & audiobooks (subscriptions and fees may apply). Control these apps from the head unit's touchscreen just like you would from your iPhone. Current supported apps include:
  • Music & Radio: Amazon Music, Tidal, Pandora, Spotify, iHeart Radio, TuneIn Radio, SiriusXM, Slacker Radio, & more.
  • News, Sports & Podcasts: Stitcher, MLB.com At Bat, NBA, CBS Radio News, NPR One, OverCast, & more.
  • Audio Books: Audiobooks.com & Audible
• Apple HomeKit Compatible: CarPlay now supports control of Apple HomeKit enabled devices (sold separately) through Siri. Using CarPlay in your vehicle, you can ask Siri to close or open your garage door, turn on or off home lighting, increase or decrease the temperature of your thermostat, as well as control select functions of other Apple HomeKit enabled devices and appliances. Click here for a list of compatible Apple HomeKit products.

Wireless Android Auto: The Pioneer receiver supports the Android Auto app for select Android smartphones using a wired or wireless connection. A Google or Samsung smartphone with Android OS 10.0+ or any smartphone with Android OS 11.0+ and 5GHz WiFi can utilize Android Auto Wireless with the Pioneer receiver using the latest version of the Android Auto app, plus a WiFi and Bluetooth connection (both wireless connections must be made; a wired USB connection must be made initially between the Android phone and the Pioneer receiver to setup Wireless Android Auto). Android smartphones running Oreo 8.0 o newer can also be connected to the Pioneer receiver's USB-A port using the included USB extension cable and USB cable that came with your smartphone, plus be paired via Bluetooth. Android Auto extends the Android platform into your car in a way that's purpose-built for driving and automatically brings you useful information and organizes it into one simple on-screen interface. It's designed to minimize distraction so you can stay focused on the road ahead. Features of Android Auto include -

• Google Assistant: The Pioneer receiver enhances your Android Auto experience even more by incorporating Google Assistant using the head unit's external microphone and your car speakers for voice command and text-to-speech, which makes using Android Auto and all of its integrated applications fast, easy, and safe. You will need to press the "mic" button or say "OK Google" to activate the Google Assistant. Use the Google Assistant to make a call, send a message, reply to a message, get driving directions, listen to music, or even control select Google Assistant smarthome enabled devices.
• Google & Waze Maps: Use Google Maps to get where you're going with on-screen maps, voice-guided navigation, live traffic information, lane guidance, and more. Select your destination by using the head unit's touchscreen or just say where you want to go through the unit's external mic and Google Speech Technology. You can even listen to music from your Android Auto device or other connected source device while using Google Maps. If you prefer, you can switch over to a simpler version of the community-based Waze navigation app (version 4.27 or higher).
• Phone & SMS: With Android Auto you get access to your contacts and messages through the Pioneer receiver while keeping your eyes on the road. Use the unit's external mic and Google Speech Technology to make a phone call, or have your text-messages read aloud to you while you concentrate on the road ahead; you can even reply to texts via voice command.
• Music: Access your Android smartphone's music library through the Pioneer receiver via YouTube Music. You'll be able to browse music like you do on your smartphone with song/artist information display and album art. Use the receiver's touchscreen to select songs or just say what song you want to listen to through the head unit's external mic and Google Speech Technology. You also get access to online music and radio stations from Amazon Music, Tidal, Pandora, Spotify, iHeart Radio, SiriusXM, Slacker Radio, Tune-In, and more; as well as news, sports and talk radio apps. Music apps include song and station browsing, plus song/artist information and album art or station logo. Click here for a list of all compatible apps for Android Auto.

WebLink (for iPhone & Android): Download the WebLink Host app (for Apple iOS 14.0+ or Android OS 7.0+) and connect your compatible iPhone or Android smartphone via USB to access select apps such as YouTube, Yelp, and Zomato through the Pioneer digital multimedia receiver. The apps must be downloaded on your compatible mobile device and can then be accessed through the Pioneer receiver's touchscreen using the WebLink interface.

• YouTube: With WebLink, you can access YouTube (for Apple iOS 12.0+ and Android OS 7.0+) and play videos on the Pioneer receiver's touchscreen monitor (your vehicle's parking brake will need to be engaged). You can select videos from a variety of categories or search by keyword(s).
• Yelp: Yelp (for Apple iOS 14.0+ and Android OS 7.0+) uses automated software to recommend the most helpful and reliable reviews for the Yelp community among the millions submitted. The software looks at dozens of different signals, including various measures of quality, reliability, and activity on Yelp. Let Yelp help you find the best Restaurants, Hotels, Automotive Service Centers, Banks, Shopping Malls, and more. Search by Category, Favorites, Distance, Point on the Map, or Keyword. A keyword search requires that your vehicle's parking brake be engaged.
• Zomato: Zomato (for Apple iOS 12.2+ and Android OS 7.0+) lets you search for and discover restaurants to eat out at or order in from. Browse through restaurant menus, photos, user reviews and ratings to decide where you want to eat, and use the map feature to guide you there.
• MediaPlayer: WebLink's MediaPlayer allows you to access your Apple iOS or Android devices stored music and video library for playback (content must be stored on the device and not the cloud). From the receiver's touchscreen, you can browse your phone's music library by Artist, Album, Genres, Playlist, or Songs. You can also search your music by typing in an artist's name or a song title (the vehicle's parking brake has to be engaged for this feature). In addition, you get playback controls such as Play/Pause, Previous/Next Track, & Random/Repeat. The digital media receiver's screen will display song/artist/album information, along with album art.

Built-In Bluetooth Audio & Phone

Bluetooth 4.2: The DMH-W2770NEX is equipped with built-in Bluetooth version 4.2, allowing you to make and receive phone calls wirelessly through the receiver; as well as stream music wirelessly from your smartphone to the head unit. 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 1.6 (Hands Free Profile), PBAP 1.0 (Phone Book Access Profile).
• Audio Streaming: A2DP 1.3 (Advanced Audio Distribution Profile), AVRCP 1.6 (Audio/Video Remote Control Profile).

Secure Simple Pairing (SSP): With Secure Simple Pairing (SSP), you can easily pair a Bluetooth enabled phone to the DMH-W2770NEX without having to enter pin codes or go through complicated settings. Up to 5 Bluetooth-compatible devices can be paired to this head unit. Once an already paired Bluetooth device is in close proximity to the receiver, the auto connection function automatically links the head unit and device together.

Hands-Free Communication (w/ External Mic): The Pioneer DMH-W2770NEX supports wireless hands-free communication for your Bluetooth enabled mobile phone. Thanks to the latest Hands-Free Profile (HFP 1.6) with wideband speech capability, the DMH-W2770NEX provides more natural sound quality and details during wireless calls. The DMH-W2770NEX allows you to carry on a phone conversation from your Bluetooth enabled mobile phone using the head unit's external microphone and your car audio speakers. During a conversation you can adjust the volume, as well as switch between the Private Mode (talking directly on your cell phone) and the Hands Free Mode.

• Answering A Call: During an incoming phone call, the head unit will display the caller's information and an audible ring tone will be heard through your vehicle's speakers. You can manually answer an incoming call or have the unit automatically answer the call.
• Making A Call: The DMH-W2770NEX offers a variety of ways to make call using the in-dash receiver.
  • Direct Dialing: You can make a call by entering the phone number using the head unit's touchscreen keypad.
  • Phone Book: The phone book (up to 1000 contacts) in your Bluetooth enabled mobile phone will be transferred automatically when the phone is paired to this unit. After finding the number you want to call in the phone book from the head unit, you can select the entry and make the call. If a lot of numbers are registered in the phone book, you can search for a phone number by the contact person's name alphabetically.
  • Call Log: The 80 most recent calls dialed, received, and missed are stored in memory. You can browse them and call numbers from these lists.

Wireless Audio Streaming: The Pioneer DMH-W2770NEX also supports wireless audio playback (AD2P) and control (AVRCP) of a Bluetooth enabled audio player or smartphone. The head unit can stream music stored on your Bluetooth enabled device or music apps you have downloaded on your device. You can control basic playback functions (such as Play/Pause, Previous/Next Track, Fast Forward/Reverse, and Repeat/Random from the head unit. The unit will also display your stored music's and music app's song information; such as Artist name and Song/Album title (app must also support). Album Art is not supported.

USB & iPhone/Android Integration

USB MSC Compatibility w/ High Resolution Playback: The unit's rear-panel USB (type-A) port and 58" USB extension cable allows you to connect a USB Mass Storage Class (MSC) device; such as a USB thumbdrive. The USB port enables playback & control of music, video, and photo files stored on your portable USB MSC device through the Pioneer DMH-W2770NEX. The head unit will also display your USB device's stored music information - including Elapsed playing time, Artist name, Song & Album title, as well as Album Art. The Pioneer NEX Series receiver even supports playback of high-resolution FLAC music files (up to 24-bit/192kHz). High-Resolution Audio is high-quality sound that exceeds CD standard. High-resolution audio captures and beautifully expresses all the details of your favorite music.

USB Mirroring for Android: You are able to mirror the screen of your Android smartphone (OS 5.0 to 10.0) on the DMH-W2770NEX's touchscreen monitor through its rear-panel USB connection and the Autolink App (requires your vehicle's parking brake to be engaged). You'll be able to operate compatible Android applications with finger gestures such as tapping, dragging, scrolling, or flicking the touchscreen monitor of the Pioneer digital multimedia receiver.

• Android Mirroring and the Autolink App only support Android OS devices running OS 5.0 to 10.0; not compatible with newer Android operating software.
• Android mirroring requires that your vehicle's parking brake be engaged.
• The supported touchscreen gestures may vary depending on the compatible Android application.
• USB Mirroring is not supported for Apple iOS devices.

iPhone Music Playback: The Pioneer DMH-W2770NEX's rear-panel USB port and 58" USB extension cable can also be used to simply connect your Apple iPhone (5S and newer) for music playback only. The USB connection allows for audio playback of stored music, music apps, and other audio content. You can use the head unit to control playback functions such as Play/Pause, Fast Forward/Rewind, Previous/Next Track, and Random/Repeat. You can also browse your music by category (playlist/song/artist/album/genre/etc.), In addition, the unit will display song/artist/album information (including album art).

• Compatible iPhone models include iPhone 5S and newer.
• Not compatible with iPhones older than the 5S, iPod nano, iPod touch, and any 30-pin Apple devices.

Smartphone Charging: The head unit's USB-A connection provides 5V/1.5A of current to power and charge your connected Apple iPhone or Android device when your vehicle's ignition switch is set to the 'ACC' or 'On' position. If your mobile device has no initial battery charge, then the unit will not recognize it.

AM/FM Tuner + SiriusXM Ready

Supertuner IIID AM/FM Tuner: The Supertuner IIID AM/FM tuner features Feed Forward Control, which avoids multi-path interference. This pre-detection of interference enables quick filter control and results in less distortion. In addition, the Supertuner IIID creates enhanced stereo during multi-path interference, unlike conventional tuners that collapse to mono. Digital processing reduces distortion, and improves Signal-to-Noise Ratio and stereo separation. Advanced analog technology improves signal processing sensitivity.

• RDS: The Radio Data System (RDS) feature displays radio broadcast information such as artist, title, and album when listening to compatible AM/FM stations.
• BSM (Best Stations Memory): BSM lets you automatically store the six strongest stations under preset buttons 1-6 of the currently tuned band. The tuner has 3 FM banks and 1 AM bank. You can store 6 presets for each bank giving you a total of 18 FM presets and 6 AM presets.
• Local Tuning: Local seek tuning lets you tune in only those radio stations with sufficiently strong signals for good reception. There are 4 levels of sensitivity for FM and two levels for AM. The higher settings allow reception of only the strongest stations, while lower settings let you receive progressively weaker stations

SiriusXM-Ready: The Pioneer DMH-W2770NEX is SiriusXM-Ready so you can listen to commercial-free music, all your favorite sports, exclusive talk and entertainment, comedy, news, traffic, weather, and more. Simply activate a SiriusXM Radio subscription (fees will apply) and connect the SiriusXM Connect Vehicle Tuner (220SXV300, sold separately) to the dedicated port on the rear of the receiver for playback and control of satellite radio. Check out the most popular SiriusXM subscription packages here.

• Channel List & Category Search: Channel list displays a list of all available channels. Category Search allows you to search for channels in a certain genre or category.
• Song/Artist/Album Info: Displayed Information such as Channel Name, Artist Name, & Song Title (including album art & station logo) can be viewed on the head unit's touchscreen monitor.
• 18 Presets: You can save up to 18 SiriusXM Satellite Radio station presets for quick and easy access.
• Parental Control: The SiriusXM Parental Control feature allows you to control access to channels that you consider inappropriate for younger listeners. When enabled, The Parental Control feature requires you to enter a 4-digit passcode to tune to the locked channels.

Video In/Out + Camera Input

AV Input: The Pioneer DMH-W2770NEX has a rear-panel 3.5mm minijack AV input for connecting an external audio/video device, such as a DVD player or TV tuner (sold separately). The Pioneer receiver's parking brake wire must be connected and your vehicle's parking brake engaged in order for the head unit to display a video signal.

Video Output: A single RCA composite video-output jack allows you to an add external monitor, such as rear headrest or overhead monitor (sold separately). The video output can display a AV-input or USB video signal when its selected as the receiver's source, regardless if the vehicle's parking brake is engaged or not.

Backup Camera Input w/ Guidelines: The Pioneer receiver is equipped with a composite video camera input for the addition of an optional backup camera (130NDBC8, sold separately). The unit provides on-screen guidelines to assist you when backing up and parking your vehicle. These guideline do not automatically appear on the rear-view image. You must tap the "Park Assist Guidelines" icon on the touchscreen while the rear-view image is visible on the receiver's touchscreen. The backup camera input offers two view modes -

• Auto View: The unit features a function that automatically switches to the rear camera image. When the vehicle's transmission is put in reverse, the screen automatically switches to the rear view camera (violet/white wire of the harness must be connected to the vehicle's reverse lamp circuit for automatic video switching). Automatic video switching takes approximately 0.8 seconds.
• Camera View: There is also a Camera View mode which allows you to manually bring up the rearview camera image on the receiver's touchscreen monitor to check what is behind you while driving. You can leave the Camera View mode on if you want to see the rearview image at all times; for instance when towing a trailer.

Amp & Audio Section

24-Bit/192kHz DAC: The Pioneer DMH-W2770NEX is equipped with a 24-bit/192kHz digital-to-analog converter for superb quality audio playback from disc, USB, iPod/iPhone, Android, and Bluetooth.

MOSFET50 Internal Amplifier: This receiver is equipped with a 50 watts x 4 (peak) MOSFET amplifier for low distortion and high power output. The amplifier is strong enough to power small subwoofers to moderate volume levels in compact cars and pickups. For higher volume levels from subwoofers, an optional amplifier may be connected to the preamp outputs.

• CTA-2006 Specs: 14 watts RMS x 4 channels (at 4 ohms, 20Hz-20kHz, 1% THD-N)
• Continuous Power Output: 22 watts RMS x 4 channels (at 4 ohms, 50Hz-15kHz, 5% THD)
• Maximum Power Output: 50 watts x 4 channels (or 50 watts x 2 channels at 4 ohms + 70 watts x 1 channel at 2 ohms for subwoofer)

2V/6CH Preamp Outputs + Sub Control: The Pioneer DMH-W2770NEX features three pair of 2.0-volt preamp outputs (Front/Rear/Subwoofer). The unit's front and rear preamp output can be faded (front/rear), while the subwoofer preamp output is non-fading. The Pioneer DMH-W2770NEX lets you adjust the subwoofer preamp output's phase (normal/reverse) and volume (+10 to -24).

High & Low Pass Crossovers: The DMH-W2770NEX employs high pass and low pass crossovers to tailor the head unit to your connected speakers and subs. The head unit features a HPF (High Pass Filter) for its front & rear speaker-level or preamp outputs. The HPF's crossover frequency can be set to 25, 32 40, 50, 63, 80, 100, 125, 160, 200, or 250 Hz. The head unit features a LPF (Low Pass Filter) for its subwoofer preamp output. The LPF's crossover frequency can be set to 25, 32, 40, 50, 63, 80, 100, 125, 160, 200, or 250 Hz.

EEQ (Easy EQ) + 13-Band Graphic EQ: There are seven stored equalizer curves which you can easily recall at any time. You can choose from - Powerful, Natural, Vocal, Super Bass, Flat, or Custom . The Custom mode allows you to manually adjust the level (+/- 12dB) of each band of the head unit's 13-band graphic equalizer (50, 80, 125, 200, 315, 500, 800, 1.25k, 2k, 31.5k, 5k, 8k, and 12.5k Hz).

Audio Settings: The head unit provides further sound adjustments for your car audio system.

• Bass Boost: You can easily boost the subwoofer bass level by using the Bass Boost function. The Bass Boost feature allows you increase the subwoofer level from 0 to +6 (0 to 12dB).
• Loudness: The Loudness function compensates for deficiencies in the low- and high-frequency ranges at low volume. You can set the Loudness to High, Mid, Low, or Off.
• Speaker Level: You can adjust each speaker and sub channel independently from +10 to -24 to best even out the sound in your vehicle.