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RetroSound Wonderbar 1 M2A

Digital media receiver for select 1949-63 General Motors vehicles — does not play CDs

Item # 068WB1M2

Trying to give your vintage General Motors vehicle a little audio love? RetroSound's Wonderbar 1 M2A digital media...

Find what Fits your vehicle

Trying to give your vintage General Motors vehicle a little audio love? RetroSound's Wonderbar 1 M2A digital media...

Item # 068WB1M2

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About the RetroSound Wonderbar 1 M2A

Made for your classic GM

Trying to give your vintage General Motors vehicle a little audio love? RetroSound's Wonderbar 1 M2A digital media receiver matches the look and fit of the factory radio in your GM, yet provides Bluetooth® for hands-free calling and audio streaming, a USB port for digital media, and inputs for other portable music players in your classic ride. This receiver's made specifically for the original radio layout in your GM vehicle, so it'll give you that look of yesteryear and deliver modern features.

Made for your classic GM

Trying to give your vintage General Motors vehicle a little audio love? RetroSound's Wonderbar 1 M2A digital media receiver matches the look and fit of the factory radio in your GM, yet provides Bluetooth® for hands-free calling and audio streaming, a USB port for digital media, and inputs for other portable music players in your classic ride. This receiver's made specifically for the original radio layout in your GM vehicle, so it'll give you that look of yesteryear and deliver modern features.

Hands-free calling and digital sound

You can use built-in Bluetooth to talk hands-free or stream audio programming from your smartphone to the receiver, and you can also plug a USB thumb drive into the rear USB port for listening to your digital music. You'll find two auxiliary inputs on the rear of the receiver for other sources, like a portable satellite radio or hi-res audio player

Added goodies

The Wonderbar 1 M2A receiver features two sets of preamp outputs that make it easier to add amps and subs to stand out at the next car show. For some customization, you can choose from 32,000 backlight colors so the LCD display will look just right in your dash. This RetroSound receiver also offers excellent AM/FM reception, as well as three EQ presets and a loudness control to tweak your sound.

Make it a complete RetroSound system

Wanna add some serious power to your ride? RetroSound offers strong amplifiers to get the most impact out of your speakers and subwoofer. They also make low-profile car speakers that fit into a wide range of older cars and trucks, so you can be sure that your sound system will do justice to your vintage vehicle.

Bluetooth note: Use of this receiver's Bluetooth features will depend upon your phone's Bluetooth capabilities. Learn more in our article explaining Bluetooth profiles.

This digital media receiver will not play CDs.


Product highlights:

    General Features:
    • digital media receiver designed for select 1949-63 GM vehicles (no built-in CD player)
    • includes faceplate and knobs to match the layout in your classic GM
    • built-in Bluetooth for hands-free calling and audio streaming
    • LCD display with 32,000 backlight color choices
    Audio Features:
    • plays MP3, WMA, and FLAC music files from USB drive
    • AM/FM tuner with 18 FM/12 AM presets
    • 3-band EQ (bass, midrange, treble)
    • 3 EQ presets plus loudness adjustment
    • inputs: dual rear auxiliary inputs; one rear USB port
    • outputs: 4-channel preamp outputs (2.85-volt front, rear/subwoofer)
    Other Features and Specs:

    What's in the box:

    • Radio body (M2A)
    • Display face
    • 2 Infinimount shafts (with 11" harness attached to each one)
    • Microphone w/ bracket (attached 8'cable terminated by 3.5mm connector)
    • Main harness
    • Power harness
    • Speaker harness
    • 2 InfiniMount brackets
    • 2 InfiniMount spacers
    • 4 Bracket mounting screws
    • 4 Face mounting screws
    • 12 Nuts
    • 8 Washers
    • User's Manual
    • Quick Start Guide
    • "STOP" note

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    More details on the RetroSound Wonderbar 1 M2A

    Stacey B.

    Product Research

    Shaft-Style Radio
    Variety of Sources
    Audio Section

    Shaft-Style Radio

    Vehicle Compatibility: The RetroSound Wonderbar 1 (M2A) radio is designed to work in select classic 1949 to 1963 GM vehicles - including Chevrolet, Cadillac, Pontiac, & Buick.

    Note: Knob sets available separately.

    Infinimount System: The Wonderbar 1 (M2A) 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 1 (M2A) 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 1 (M2A) 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 1 (M2A). 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 1 (M2A) is compatible with most Bluetooth enabled mobile phones, including the Apple iPhone & Android smartphones.

    • Hands-Free Communication: The Wonderbar 1 (M2A) 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 1 (M2A) 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.
    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 Wonderbar 1 (M2A).

    USB Port: The RetroSound Wonderbar 1 (M2A) features a USB (type-A) port connected to its rear chassis by a 20" pigtail. The USB port enables connection of  a portable USB mass-storage class (MSC) device; such as a 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. 0.5A), and the vehicle's ignition switch is set to ACC or On.
    • Not compatible with Apple iOS or Android mobile devices.
    • You cannot connect a USB device via a USB hub or Multi-Card Reader to this unit.

    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.

    RDS AM/FM Tuner: The Retrosound head unit features a built-in RDS AM/FM tuner. 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.

    Audio Section

    25W x 4Ch MOSFET Amplifier: The Wonderbar 1 (M2A) is equipped with a 25 watts x 4-channel RMS/45 watts x 4-channel Peak MOSFET amplifier.

    4Ch/2.85V RCA Outputs: The shaft-style receiver features features 4 channels (Front & Rear) of 2.8V RCA outputs.

    Equalizer: The Wonderbar 1 (M2A) 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 from -7 to +7.

    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 1 (M2A) 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.

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    Customer Q&A

    6 questions already asked

    Does this radio fit in a 1956 Chevy Nomad without an aftermarket faceplate?
    [ Robert  Jun 06, 2021 ]
    1 answer
    it fit my 55 nomad without a aftermarket face place should the same
    [ Jim  Jun 06, 2021 ]
    I am hoping to put this into a 1958 Metropolitan. The existing dial holes are 8 1/2" apart. Will the Infinimount allow that width?
    [ Joe  Aug 28, 2020 ]
    1 answer
    You can check to see if this will fit your vehicle by using our Outfit My Car tool: For additional details on fit or installation please contact an Advisor by phone (1-800-324-9695) or online chat. They will be able to pull up your vehicle and give you the details on if this will fit and what you will need for an installation in your vehicle.
    [ Calvin  Sep 14, 2020 ]  Staff
    Are the dials adjustable? (Able to slide to fit the car). I have a 56 Chevy Bel air wagon.
    [ Brad  Aug 12, 2020 ]
    3 answers
    Yes the dials ate adjustable
    [ JESSE  Aug 13, 2020 ]
    Yes they are very easy to adjustEnter an answer to this question.
    [ GARY  Aug 12, 2020 ]
    Yes, I put it in a 55 Buick Century
    [ Paul  Aug 12, 2020 ]
    Help - Will this radio fit in the dash with a Vintage Air Gen IV Sure Fit in a 56 Chevy 210?
    [ Fred  Jan 12, 2020 ]
    1 answer
    It should I have vintage air in my 55 nomad no problem with install
    [ Jim  Jan 12, 2020 ]
    Does it install with NO alteration in replacing the original wonderbar?
    [ dennis  Oct 22, 2019 ]
    2 answers
    Yes . As far as fit it's excellent. It is however a more complicated install. The stems are removable and are very adjustable as far as spacing and depth. I had to do a little trial and error to get it correct but it does fit great. Not that difficult but wouldn't recommend the installation for a novice.
    [ Brad  Oct 22, 2019 ]
    Fit right in to my 1956 Cadillac sedan divill
    [ JESSE  Oct 22, 2019 ]

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    Looking for more?

    Check out the next model in this lineup.

    RetroSound Wonderbar 1 M4HD
    Digital media receiver for select classic General Motors vehicles — does not play CDs
    Chassis with Chrome Push Buttons
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    Add more audio features to your classic GM

    The RetroSound Wonderbar 1 M4HD offers these features:
    • compatible with SiriusXM satellite radio tuner
    • iPod/iPhone direct control and charging via USB input
    • 2-year warranty
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