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Roland TB-03 Bass Line Synthesizer

TB-03 Bass Line Synthesizer with Advanced ACB Technology, Overdrive/Distortion, Tape Echo/Digital Delay/Reverb, and is Battery/USB Powered.


(5 reviews)


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Discounted Price $399.99
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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 audio interface.

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.

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.


  • 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
  • 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
  • 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
  • Includes Owner's Manual, DK-01 Owner's Manual, and Batteries

Get your Roland TB-03 Bass Line Synthesizer today at the guaranteed lowest price from Sam Ash with our 45-day return and 60-day price protection policy.

Things You Will Get:

  • Synthesizer
  • Owner's Manual DK-01 Owner's Manual
  • Alkaline battery (AA, LR6) x 4

That hustle


I enjoy doing business with Eddie. If he doesn't have the item in stock, he finds it.



Updated and Enhanced!


This hand-held, battery-powered version of the beloved TB-03 is a major home-run from Roland! The new TB-03 has all the features, and familiar layout of the TB-303 with extras added in. In addition to all the beloved tones featured on the predecessor, the TB-03 has a new four digit LED display which makes programming far easier and more accurate than ever before, no more guess-work! There are a ton of delay, overdrive and reverb effects that can drastically change the tone that are included on this updated version. The TB-03 also allows the user to connect directly to your computer via USB and MIDI ports.

Lady Landa

Edison, NJ


Classic Gets An Upgrade


The Roland TB-03 Bassline is the same bass line synth you know & love with a few upgrades. 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. It's battery or USB powered, has Analog Circuit Behavior & has a built in speaker.

Christopher H

Cincinnati, OH


Bringing back a classic


This year Roland brought back a fan favorite, the TB-303. Renamed the TB-03, this synth has the same layout as the vintage 303 but has a few enhancements like MIDI in and out as well as USB so you can record right into a DAW system. Great sound and very fun to play with.


Edison, NJ



Roland has been re-releasing quite a few of their older formats and I am glad to see these coming back with updated stuff on them! The TB03 is much like its older brother but has both MIDI and USB capabilities, effects and led lights. They sound as great as the original and I have had fun playing around with these. You can buy the optional $99 keyboard for them or MIDI them up to your own or control them through the computer. Very versatile and fun!!

Lee @ Sam Ash Cincinnati



TB-03 Bass Line Synthesizer

5.0 5


Synth Type Digital
Synthesizer Format Synthesizer Module
Controller Types Knobs
Wave Memory Patterns: 96 (4 groups (I, II, III, IV) x 3 sections (A, B, C) x 8 patterns) Tracks: 7
Effects Type Tape Echo, Digital Delay, Reverb, Overdrive
Arpeggiator No
Sampling No
MIDI Sequencer Yes
Audio Input Types 1 x 1/8" (Mix In)
Audio Output Types 1 x 1/8" (Headphones), 1 x 1/8" (Output)
Power Supply Type Rechargeable Ni-MH battery (AA, HR6) x 4 Alkaline battery (AA, LR6) x 4 USB bus power
Weight 2 lbs 2 oz
Dimensions 12-1/8 x 5-1/8 x 2-1/16 inches (WxDxH)
Series TB Series
Model TB03
Warranty Info:

The manufacturer's warranty covers parts for one year and labor for 90 days from date of purchase. The warranty excludes damage from misuse, abuse, and contains other exclusions.

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