Shaft-Style Radio
Variety of Sources
Audio Section

Shaft-Style Radio

Vehicle Compatibility: The RetroSound Wonderbar 3 (M4HD) radio is designed to work in select classic 1949 to 1963 GM vehicles - including Chevrolet, Cadillac, Pontiac, & Buick.

Infinimount System: The Wonderbar 3 (M4HD) radio features RetroSound's Infinimount System. In this design, the shaft knobs and the display face are not permanently mounted to the unit, but instead connect to the unit via a harness so you can space the radio's shaft knobs at various distances from the chassis of the radio, as well as mount the face independently from the chassis body using the supplied mounting brackets.

Variable-Color LCD: The RetroSound Wonderbar 3 (M4HD) 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 to High or Low.

Variety of Sources

Built-in Bluetooth: The RetroSound Wonderbar 3 (M4HD) is equipped with built-in Bluetooth (HFP/A2DP/AVRCP) 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. Before using your Bluetooth enabled device, it must be paired to the Wonderbar 3 (M4HD). 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. The Wonderbar 3 (M4HD) is compatible with most Bluetooth enabled mobile phones, including the Apple iPhone & Android smartphones.

• Hands-Free Communication: The Wonderbar 3 (M4HD) 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: The Wonderbar 3 (M4HD) 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.

Dual USB Ports: The RetroSound receiver 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 receiver 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 receiver 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. 2.1A), and the vehicle's ignition switch is set to ACC or On.

iPod Direct Connection: 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 Wonderbar 3 (M4HD) supports audio playback of stored music or music apps, music navigation, information display, and charging of select iPod/iPhone models.

• iPod 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).
• iPod Display: The Wonderbar 3 (M4HD) 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.
• iPod Charging: The unit's USB connection provides 2.1A 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/iPhone Compatibility: The Wonderbar 3 (M4HD) supports select 30-pin and Lightning-connector iPod and iPhone models (not compatible with iPad).

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

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.

HD Radio: The Retrosound digital media receiver features a built-in HD Radio, plus an RDS AM/FM tuner. HD Radio technology gives you access to crystal clear HD Radio broadcasing in your area. HD Radio and the 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 Wonderbar 3 (M4HD) is SiriusXM-Ready and connects to the SiriusXM SXV300 Connect Vehicle Tuner (220SXV300, sold separately). The SXV300 plugs directly into the head unit 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

Audio Section

22W x 4Ch Amplifier: The Wonderbar 3 (M4HD) is equipped with a 22 watts x 4-channel RMS/60 watts x 4-channel Peak amplifier.

6Ch/2.85V RCA Outputs: The 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 Wonderbar 3 (M4HD) 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 Wonderbar 3 (M4HD) 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.