About the RetroSound Wonder Bar 1 M1A

Soup up the audio in your vintage GM
Soup up the audio in your vintage GM
If you want to replace the vintage factory radio in your 1949-63 General Motors vehicle, RetroSound's Wonder Bar 1 M1A media receiver matches the look and fit of the original radio in your ride. This ingenious radio fits a wide variety of classic GM cars and trucks, thanks to RetroSound's patented "InfiniMount" adjustable shaft/bracket system. You can even install the Wonder Bar 1 M1A chassis remotely with an optional RetroSound extension cable for customizing versatility. Now you can cruise in style and enjoy your music in a whole new way.
Simplicity is key
The Wonder Bar 1 M1A looks like an old-fashioned radio, but the vintage push-button styling conceals a thoroughly modern receiver that's made to entertain you. You can enjoy all your favorite AM/FM stations, plus you can plug your smartphone, Dock-and-Play satellite radio, portable music player, or just about any source with a headphone jack into the auxiliary input on the rear of the receiver. The solid built-in amplifier delivers 18 watts RMS per channel, plenty of power for most situations. And new for 2021, this radio's improved circuit board includes built-in noise suppression, which ensures your sweet music will be crisp and clear.
More power to you
Want to add some serious power to your RetroSound receiver? The Quad4 amplifier delivers 45 watts RMS by four channels to your speakers without taking up a lot of space. The super-compact amp plugs into your radio's harness and, in most cases, can be powered from your fusebox, so you'll save a lot of time and effort on the installation. RetroSound also makes 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.
Adapt it to a DIN opening
If your classic car has already been altered to accept a DIN (2" tall) radio, we offer a repair kit to convert your dash opening back to its original splendor!
This radio does not play CDs.
Product highlights:
General Features:
- media receiver designed for select 1949-63 General Motors vehicles
- chassis only, requires push button kit and knobs which you'll choose when you add to Cart
- built-in amplifier (18 watts RMS/45 watts peak x 4 channels)
- rear-mounted 3.5mm aux input with 7" pigtail for smartphones, satellite radios, portable music players, and other devices
- InfiniMount shaft/bracket system fits a variety of vintage car dash openings
- circuit board with built-in noise suppression for cleaner sound
Other Info:
- AM/FM tuner with 18 FM/12 AM presets
- 4 EQ presets plus user-controlled bass, treble, fader, balance, and mute
- separate power antenna and amplifier turn-on leads
- selectable USA/EU frequencies
- white illumination
- warranty: 1 year
- MFR # WB1-M1A
What's in the box:
RetroSound Wonder Bar 1 M1A owner's manual
- Radio body (M1)
- Display face
- 2 Infinimount shafts (with 11" harness attached to each one)
- 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 Wonder Bar 1 M1A

Product Research
Shaft-Style Radio
Built-in Tuner & Aux Input
Audio Section
Shaft-Style Radio
Vehicle Compatibility: The RetroSound Wonderbar 1 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 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.
LCD Display: The RetroSound Wonderbar 1 features an LCD with a digital read-out.The unit's LCD offers an ultra-wide, off-axis viewing angle and is daylight compatible. The LCD will display clock and tuner information. The color illumination of the LCD is white (fixed).
Built-in Tuner & Aux Input
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.
Aux Input: The universal shaft-style receiver features a 3.5mm auxiliary input connected to the rear chassis by 7" pigtails. The Aux input provides a connection for portable external audio sources such as a MP3 player or CD player.
Audio Section
18W x 4Ch Amplifier: The Wonderbar 1 is equipped with a 18 watts x 4-channel RMS/40 watts x 4-channel Peak amplifier. An improved circuit board with built-in noise suppression delivers great sound.
Preset EQ + Bass & Treble: The Wonderbar 1 features the following preset EQ curves (Classic, Pop, Rock, or Off) to customize your music listening. The Off mode activates manual Bass & Treble adjustment.
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 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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