RetroSound Denver M4

Shaft-Style Radio
Built-In Bluetooth
USB/iPhone/Aux Integration
AM/FM Radio + SiriusXM Ready
Audio Section

Shaft-Style Radio

Vehicle Compatibility: The RetroSound Denver (M4) shaft-style digital media receiver fits seamlessly into the unique 3.5" (w) x 1.5" (h) opening in the dash of your 1960 to 1980 classic vehicle. The nose of the Denver has rounded corners designed to fit flush in your classic vehicle and provide a factory-like fit without the need for a faceplate or bezel. Combined with replica knobs (sold separately) that mimic the look and feel of your original radio, the Denver is the perfect classic car stereo for adding modern stereo features with period-correct styling to the following 1960 to 1980 vehicles

• 1960 to 1963 GMC C/K Series
• 1960 to 1963 Chevy Suburban
• 1961 to 1980 International Scout
• 1966 to 1967 Oldsmobile Cutlass
• 1966 to 1967 Oldsmobile F85
• 1966 to 1967 Oldsmobile 442
• 1971 to 1975 Plymouth Roadrunner
• 1973 Dodge Charger

Note: The RetroSound Denver (M4) is available with a Black or Chrome faceplate.

Knobs Sold Separately: The RetroSound Denver (M4) does not come with knobs. There are multiple vehicle specific chrome and black knobs available for the Denver (M1A) that can be purchased separately. A separate trimplate or bezel is not required

Variable-Color LCD: The RetroSound Denver (M4) features variable color illumination display with over 32,000 of color variations. Choose from a selection of preset colors, have the unit scan through all preset color continuously, or customize your own color to better match your vehicle's interior lights. You can also adjust the brightness of the display from High, Medium, or Low. The LCD will display clock, audio settings, tuner stations, and song/artist information from USB and iPod/iPhone devices.

Built-In Bluetooth

Bluetooth Technology: The RetroSound Denver (M4) is equipped with built-in Bluetooth allowing you to make and receive phone calls wirelessly through the receiver; as well as stream music wirelessly from your Bluetooth-enabled smartphone to the head unit. The Denver (M4) is compatible with most Bluetooth enabled mobile phones, including the Apple iPhone & Android smartphones.

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 RetroSound Denver (M4).

Pairing: Before using your Bluetooth enabled device, it must be paired to the Denver (M4). You can only pair one device at a time with this unit. Once paired, when your Bluetooth device is in close proximity to the RetroSound receiver, the auto connection function automatically connects the two units.

Hands-Free Communication (HFP): The Denver (M4) allows for wireless communication between the head unit and your Bluetooth enabled cell-phone. You can answer an incoming call from the head unit's front-panel control knobs. Incoming phone call information will be displayed on the unit's front-panel LCD and your music will be pause or muted. You will still use your phone to dial a phone number and then the call will transfer to the RetroSound radio. Use the included external microphone to speak into during your phone conversation, while the other party will be heard through your vehicle's speakers.

Wireless Audio Streaming (AD2P/AVRCP): The Denver (M4) also allows you to play back stored music and  music apps from your Bluetooth-enabled phone or personal music player using a paired Bluetooth connection. Playback controls included Play/Pause, Stop, & Next/Previous Track. This unit does not display song/artist information from Bluetooth audio devices.

USB/iPhone/Aux Integration

Dual USB Ports: The RetroSound Denver (M4) features two USB (type-A) ports connected to its rear chassis by a 20" pigtail. The USB ports enable connection of  portable USB mass-storage class (MSC) devices; such as a portable digital audio player or USB thumbdrive. Once you've connected your compatible USB device, the Denver (M4) will find your songs instantly and automatically start playing them. This unit supports MP3 (128 kbps +), WMA (64 kbps +), and FLAC music files in format FAT and FAT32. The unit can recognize a maximum of 999 songs/files (files will be read in order of creation and not alphabetically or numerically).

• Controls: You will be able to control basic playback functions of your music files such as Play, Pause, Skip Track, Intro Scan, Repeat Track, and Random.
• Display: The Denver (M4) also supports ID3-tags/WMA-tags for song/artist information. 
• Charging: USB portable audio players that can be charged via USB will be charged when plugged into the receiver's USB port (max. 0.5A), and the vehicle's ignition switch is set to ACC or On.

Notes:

• Not compatible with Android mobile devices.
• You cannot connect a USB device via a USB hub or Multi-Card Reader to this unit.

iPod/iPhone Direct Connect: Either rear-panel USB port can act as an iPod/iPhone high-speed direct connection when used with the USB/iPod cable that came with your iPod/iPhone. The USB connection allows your iPod/iPhone's stored music and music apps to be loaded instantly to the unit and sound quality to be maximized through the head unit's 1-bit D/A converter. The RetroSound Denver (M4) supports audio playback of stored music or music apps, music navigation, information display, and charging of select iPod/iPhone models.

• Control: You can control your connected iPod/iPhone from the head unit's front-panel control knobs. You can browse your iPod/iPhone's music by Playlist, Artist, Album, Song, Genre, Composer, or Podcast.  In addition, you can activate Repeat playback modes (all/track). Most iPod/iPhone device's clickwheel or touchscreen will be locked during connection (Apple devices w/ iOS 6.0+ will stay unlocked).
• Display: The Denver (M4) will display your iPod/iPhone's music file information from stored music. The head unit will display Track number, Elapsed playing time, Artist name and Song/Album title.
• Charging: The unit's USB connection provides 0.5A 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/iPhone Compatibility: The Denver (M4) supports select 30-pin and Lightning-connector iPod and iPhone models (not compatible with iPad).

• Full Size: Classic (all generations)
• Nano: 3rd Generation and newer
• Touch: 2nd Generation and newer
• iPhone: 3G and newer

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.

Dual Auxiliary Inputs: The universal shaft-style receiver features two 3.5mm auxiliary inputs connected to the rear chassis by 7" pigtails. The Aux inputs provide a connection for portable external audio sources such as a MP3 player or CD player.

AM/FM Radio + SiriusXM Ready

RDS AM/FM Tuner: The Denver (M4) features a built-in RDS AM/FM tuner. The Radio Data System (RDS) feature displays radio broadcast information such as artist & track information when listening to compatible AM/FM stations. The unit's tuner features 3 FM bands and 2 AM bands. A total of 30 AM/FM presets can be stored manually or automatically. Select between Local and Distant settings can aid in listening to weak FM radio stations or compensate for stations that have too strong of a signal. This unit's tuner can be set to USA or European tuning.

SiriusXM Ready: The Denver (M4) is SiriusXM-Ready and connects to the SiriusXM SXV300 Connect Vehicle Tuner (220SXV300, sold separately). The SXV300 plugs directly into the Denver (M4) without the need for special adapters or cables. A SiriusXM subscription is also required. The SiriusXM Connect Vehicle Tuner supports SiriusXM programming with access to 175+ SiriusXM channels via subscription. Check out the most popular SiriusXM subscription packages here.

• Category Search searches for channels in a certain category
• Information such as Channel Name, Artist Name, and Song Title can be viewed on the head unit's display
• Up to 15 SiriusXM Satellite Radio station presets
• Channels containing unsuitable content for children can be blocked

Note: A separate SiriusXM Satellite Radio subscription is required (operates on the XM Network). However, you can easily add this SiriusXM tuner to an existing Sirius or XM account for a Multi-Radio Discount Plan.

Audio Section

MOSFET Amplifier: The Denver (M4) is equipped with a 25 watts x 4-channel (RMS)/45 watts x 4-channel (Peak) MOSFET amplifier.

6Ch/2.85V RCA Outputs: The universal shaft-style receiver features front, rear and subwoofer 2.85-volt RCA outputs. The front and rear speaker RCA outputs are balance and fade adjustable. The subwoofer RCA output is non-fading.

Subwoofer Control: When the subwoofer RCA output is active, you can adjust the output level (0-12) of the sub output. You can also set the low-pass crossover to 80, 120, or 160Hz.

Equalizer: The Denver (M4) features the following preset EQ curves (Classic, Pop, Rock, or Off) to customize your music listening. The Off mode activates a 3-Band EQ which lets you adjust Bass, Midrange, & Treble manually.

XBAS: This function boosts bass & treble at low listening volumes, and should be turned off at higher listening levels.

Balance & Fader Control: The Balance adjustment function allows you to adjust or pan the stereo sound from the left or right; this is helpful to compensate for the position of the driver in relation to the speaker locations. Adjustment range is 0 to 12. The Fader Control allows you to fade the sound from the front pair of speaker to your rear pair of speakers. Adjustment range is 0 to 12.

Turn-On Volume: You can set the Denver (M4) to power-on to the same volume level (0-46) every time, or let it default to the last volume when turned off.

Key Beep: When this function is enabled, every knob turn or button press will output a beep tone.