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Call for special pricing.

We'll beat any advertised price.

Talk to a real human at 844-802-4499

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RetroSound Motor 2B Radio

The RetroSound Motor 2B is the most popular RetroSound motor. It adds more amplifier power, a USB port, a selectable color display and line outputs for an amplifier or subwoofer, while the radio keeps the classic look of your dash.

Motor 2B Features

  • Built-in Bluetooth for hands-free calling and audio streaming, with wireless audio browsing from an iPhone or Android phone
  • AM/FM tuner with 30 presets and RDS, plus selectable international tuner frequencies
  • Built-in MOSFET amplifier: 25 watts RMS / 45 watts max x 4 channels
  • Rear-mounted USB port plays MP3, WMA and FLAC files (2.1A USB charging)
  • Multi-channel pre-amp outputs: front, rear and subwoofer
  • Selectable 32,000-color LCD illumination with user presets
  • 3 EQ presets plus bass, mid-range, treble, fader and balance
  • Separate power antenna and amplifier turn-on leads, non-volatile memory
  • Patented InfiniMount bracket system, available with period-correct knobs and bezel for your vehicle

Warranty: 1 year from Retro Manufacturing, when purchased from an authorized dealer.

How RetroSound Fit and Options Work

A RetroSound radio has two parts: the radio face, which is made for your dash, and the radio motor, the electronics behind it. On each RetroSound radio page you choose the motor with the Motor option, and Motor 2B is one of the choices alongside the others. Face color, look package, knob and pushbutton choices appear on the radios that offer them.

  • RetroRadio faces use the patented InfiniMount brackets and adjustable control shafts, so the radio fits the original dash opening.
  • DIN Solutions faces (Liberty, Europa, Grand Prix and others) have their own installation manual.
  • Specialty faces (for example Redondo, Daytona and Wonder Bar) come with a quick start guide that covers their model-specific steps.

Not sure which motor to pick? See the RetroSound Motor 1B vs 2B vs 4HD comparison, or call 844-802-4499.

Chevelle Fit: 1964-1972 and Beyond

Every RetroSound Chevelle radio below lets you pick Motor 1B, 2B or 4HD on the product page. The RetroRadio face and shafts are made for the Chevelle dash, so the dash isn't cut.

Chevelle radios by generation: 1964-1965 · 1966-1967 · 1968-1972 · 1973-1977 · all Chevelle radios

Popular RetroSound Radios

Shop RetroSound: all RetroSound radios · Camaro · Mustang · Chevy Truck · Bel Air · Corvette · RetroSound speakers · RetroSound accessories

Motor 2B Installation & Wiring

This is a short overview taken from Retro Manufacturing's Installation & Assembly Manual and motor wiring diagrams. Read the full manuals before you start. The store does not install radios in vehicles.

Before you start

  • RetroSound radios are for 12-volt negative-ground systems only. A 6-volt car needs a 12-volt conversion or an inverter rated at 10 amps or more. Positive-ground systems are not supported.
  • Cutting the main wiring harness, antenna lead, USB or AUX cables voids the warranty.
  • The radio needs 12 volts on both the red and yellow leads. If the voltage on the yellow lead drops a lot when you turn the key, that circuit can't handle the radio; use another circuit or go directly to the battery.

Assembly (RetroRadio faces)

  1. Connect the face: plug the ribbon cable from the motor into the radio face. The motor has a second ribbon cable that is only used for DIN Solutions radios; tuck it back into the motor housing.
  2. Attach the face to the motor with the four small screws from the face box, with the RetroSound logo on the motor facing up.
  3. Attach the InfiniMount brackets (marked L and R) with at least two screws each. You can move them forward, back, up or down, and they may be rotated, cut or bent for a better fit without voiding the warranty.
  4. Set shaft width: measure your dash shaft holes center to center (and any offset) and match them to the bracket positions.
  5. Set shaft depth: bring the brass part of each shaft about a quarter inch past the display face, snug the shaft nuts finger tight (don't overtighten), then plug the shaft cables into the motor.
  6. Bezel or faceplate: slide a bezel over the face before the radio goes into the dash; with a faceplate, put the radio in from behind the dash first. Plastic spacers are included for fit.
  7. Wire it: connect your power and speaker wires to the power and speaker harnesses, plug the main harness into the motor, then join the harnesses. Connect the Bluetooth microphone and any USB or AUX cables and route them now.
  8. Attach the backstrap: secure the rear of the motor to the factory mounting point with the supplied backstrap and hardware. Skipping the backstrap can damage the control shafts and voids the warranty.
  9. Finish: add the final washer and nut to each shaft, then the rear and front knobs.

Wire colors (Motor 1B, 2B and 4HD-1)

  • Yellow: constant +12V. Red: ignition/accessory +12V. Black: ground. The harness has a 15-amp fuse.
  • Blue: power antenna lead, for fully automatic antennas only. A factory "semi-automatic" antenna that uses a switch must keep its switch. Blue/white: remote/amp turn-on lead.
  • Speakers (4 ohm): left front white (+) and white/black (−); right front grey (+) and grey/black (−); left rear green (+) and green/black (−); right rear purple (+) and purple/black (−). Retro Manufacturing recommends 16-gauge speaker wire.
  • Motor 2B connections: antenna jack, Bluetooth microphone input, USB input, front RCA line out (black wire), rear RCA line out (grey wire) and subwoofer line out (blue wire). The RCA outputs feed an amplifier.

If there's no sound

  • If the display lights but there is no sound, check for speaker wires touching each other or the chassis, and for speakers below 4 ohms.
  • Thin, mid-range-only sound usually means a speaker is wired out of phase; match positive to positive and negative to negative.

Manuals and Wiring Diagrams (PDF)

More manuals: Manuals page.

Other RetroSound motor guides: Motor 1B · Motor 4HD.