Roland TB03 Bass Line Boutique Series


Classic TB-303 Sound in the Palm of Your Hand

The battery-powered TB-03 is a direct descendant of the famous TB-303 Bass Line Synth.

  • Old Skool meets Nu Skool!
  • Hands-On Control
  • Pitch, Time, and Step Write
  • CV/Gate Outputs
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Roland TB-03 Bass Line

The Classic TB-303 Sound in the Palm of Your Hand

The battery-powered TB-03 is a direct descendant of the famous TB-303 Bass Line Synth. The layout and controls are unchanged, so it works just like the original. It sounds like it too, thanks to Roland’s advanced ACB technology that recreates the hypnotic liquid grooves of the magic silver box. But the new TB-03 goes even further, with several enhancements not found on the original model. The four-digit LED display makes programming easier and more accurate, while overdrive and delay effects let you unleash a twisted, tribal wall of sound to send the crowd into a frenzy. Back in the studio, the TB-03 can send control information via MIDI or its USB port, the latter of which also functions as a 24-bit/96 kHz audio interface.

Realistic recreation of the iconic TB-303 Bass Line synth

  •     Retains the sound, character, and user interface of the original TB-303
  •     Hands-on control over expressive parameters, including cutoff, resonance, envelope mod, decay, and accent
  •     New features not found on the original TB-303, including four-digit LED display, overdrive and delay effects, MIDI, fine tempo control, and additional functions for pattern creation
  •     Programmable via classic Pitch, Time, and Step write modes
  •     Continue playing a sequence even while switching between write and play modes
  •     CV/Gate outputs for controlling vintage analog gear and modular synthesizers
  •     Dedicated trigger input to drive the internal sequencer
  •     Highly portable for mobile music making
  •     High-quality construction with metal front panel
  •     Battery-operated (4 x AA) or USB powered
  •     24 bit/96 kHz stereo IN/OUT USB audio interface
  •     Control information can be sent and received via MIDI and USB
  •     Built-in powered mini-speaker for instant enjoyment
  •     Compatible with optional K-25m Keyboard Unit

 Authentic 303 Sound and Behavior via Roland’s ACB Technology

    You know when you hear a TB-303—a hypnotic, tribal sound that works best in dark, crowded rooms with big sound systems. Using the same ACB (Analog Circuit Behavior) technology from the acclaimed AIRA series, the TB-03 accurately emulates the expressive, slippery sound of its older brother, and even adds a few surprises. Saw and square waveforms are available, along with all of the rotary control knobs that help shape the 303’s unique character, including tuning, cutoff, resonance, envelop mod, decay, and accent.

New Features Not Found in the Original

    The TB-03 includes several enhancements over the original TB-303. Firstly, the four-digit LED display makes programming easier and more detailed, since you now have a visual representation of the value being edited. Then there are a variety of overdrive, delay, and reverb effects that dramatically change the mood and tone of the TB-03, going from smooth to spiky to squealing. Programming patterns is also easier thanks to newly added functions that include step write, shuffle, and fine tempo control. Finally, the inclusion of MIDI and USB ports mean that the TB-03 can send and receive control information and connect easily to computer-based DAWs.

Classic TB Sequencer with Enhanced Functions

    If you’re familiar with the TB-303’s programming method, then you’ll feel right at home with the TB-03. The original Pitch and Time write modes are included, along with an all-new Step mode. Pattern programming is also enhanced by the LED display, which shows the current step in the sequence as well as showing fine tempo values (such as 125.5 BPM). The internal sequencer can be triggered externally via the trigger input, and you can even switch between write and play modes without stopping pattern playback, opening up new possibilities for live performance.

Connect with External gear

    The TB-03 includes MIDI IN/OUT ports and USB, allowing control information to be exchanged with other instruments and devices. This turns the TB-03 into a versatile controller, especially as you can use the CV/Gate output to control external analog gear and modular synthesizers. This level of control works both ways, thanks to the trigger input that lets external gear drive the TB-03’s internal sequencer. Once connected to a PC or Mac, both audio and MIDI data can be sent through the USB port.

Battery or USB Bus Power

    Some of the best music is made away from the studio, so the Roland Boutique series runs on 4 x AA batteries, ready for when inspiration strikes. Alternatively, the TB-03 can run on USB bus power.

USB Audio Interface for Direct Recording to Your DAW

    Via its USB port, the TB-03 functions as a high-quality 24-bit/96 kHz audio interface, providing a simple and reliable way of recording directly to your DAW application. You can keep your favorite settings and sequencer patterns safe too via the USB data backup function.

User Memory
    Patterns: 96 (4 groups (I, II, III, IV) x 3 sections (A, B, C) x 8 patterns)
    Tracks: 7
    BVOLUME knob
    TUNING knob
    CUT OFF FREQ knob
    RESONANCE knob
    ENV MOD knob
    DECAY knob
    ACCENT knob
    OVERDRIVE knob
    DELAY TIME knob
    WAVE FORM switch
    TRACK PATT. GROUP selector
    MODE selector
    TEMPO button
    VALUE knob
    PATTERN CLEAR button
    RUN/STOP button
    PITCH MODE button
    FUNCTION button
    Keyboard buttons (C, C#, D, D#, E, F, F#, G, G#, A, A#, B, C)
    TIME MODE button
    ACCENT button
    SLIDE button
    BACK button
    TAP button
    OVERDRIVE (Overdrive/Distortion)
    DELAY (Tape Echo/Digital Delay/Reverb)
    7 segments, 4 characters (LED)
    TRIGGER IN jack: Mono miniature phone type
    CV OUTPUT jack: Mono miniature phone type
    GATE OUTPUT jack: Mono miniature phone type
    PHONES jack: Stereo miniature phone type
    OUTPUT jack: Stereo miniature phone type
    MIX IN jack: Stereo miniature phone type
    MIDI (IN, OUT) connectors
    USB port: Micro-B type (Audio, MIDI)
Power Supply
    Rechargeable Ni-MH battery (AA, HR6) x 4
    Alkaline battery (AA, LR6) x 4
    USB bus power
Current Draw
    500 mA (USB bus power)
Expected battery life under continuous use
    Rechargeable Ni-MH battery: Approx. 5 hours
    * This can vary depending on the specifications of the batteries, capacity of the batteries, and the conditions of use.
    Boutique Dock: DK-01 (Silver)
    Owner's Manual
    DK-01 Owner's Manual
    Alkaline battery (AA, LR6) x 4
Size and Weight
    308 mm
    12-1/8 inches
    130 mm
    5-1/8 inches
    52 mm
    2-1/16 inches
    940 g
    2 lbs 2 oz