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Roland TB-03 Bass Line Synthesizer , $479.99 - Add to Cart Skip to Product Information

Roland TB-03 Bass Line Synthesizer

Boutique Series Bass Synthesizer with TB-303-style Programmability, Step Sequencer, CV/Gate Outputs, MIDI, and 2-channel USB Interface
Roland TB-03 Bass Line Synthesizer
Roland TB-03 Bass Line Synthesizer

Backordered - More On The Way!

We expect more from Roland in just a few weeks. Order today to reserve yours now, risk-free. Estimated October 2026

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Roland TB-03 Bass Line Synthesizer
Backordered - More On The Way!

We expect more from Roland in just a few weeks. Order today to reserve yours now, risk-free. Estimated October 2026

Classic TB Bass, Updated

This article was Written By

Our Product Research Team

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The Roland Boutique TB-03 gives you the sound and control set of the company's iconic TB-303 Bass Line synth in a petite battery-powered unit that fits in the palm of your hand. Powered by Roland's cutting-edge Analog Circuit Behavior (ACB) technology, the TB-03 serves up the flowing, spellbinding grooves of the infamous silver box, and takes things further with enhancements not found on the original. A 4-digit LED display lets you program and tweak more accurately than ever, while overdrive and delay effects let you deploy savage walls of sound that will drive your club audiences wild. In the studio, connect with external gear and your computer via the TB-03's MIDI I/O and USB port, which functions as a 24-bit/96kHz audio interface. Roland TB-03 Bass Line at a Glance:

  • The classic TB sequencer, enhanced
  • Modern connectivity with external gear

The classic TB sequencer, enhanced Around Sweetwater, the Roland TB-303 is a revered 1980s classic. If you know the original's programming method, you'll feel instantly comfortable with the TB-03. Roland has included the original Pitch and Time write modes, along with a new, intuitive Step mode. A new LED display enhances Pattern programming by showing the current step in the sequence, as well as fine tempo values. The TB-03 gives you new live-performance possibilities by letting you trigger the internal sequencer via the TB-03's trigger input or switch between write and play modes without stopping pattern playback. Modern connectivity with external gear The original TB-303 was a product of the pre-MIDI era. The TB-03 naturally offers full modern connectivity that includes MIDI I/O and USB, for flowing control information freely with other gear. So the TB-03 becomes a versatile controller you can also use to control external analog gear and modular synthesizers via its CV/Gate outputs. This works both ways, courtesy of a trigger input that lets external equipment drive the TB-03's onboard sequencer. Connect to a Mac or PC, and you can send both audio and MIDI data through the USB port - great for recording to your DAW of choice. Roland TB-03 Bass Line Features:

  • Modern re-creation of Roland's vintage TB-303 Bass Line synth
  • Delivers the iconic sound and user experience of the original
  • Hands-on control for cutoff, resonance, envelope modulation, decay, and accent
  • New features not found on the original TB-303:
    • 4-digit LED display
    • Overdrive and delay effects
    • MIDI and USB
    • Fine tempo control
    • Additional pattern-creation functions
  • Program using classic Pitch, Time, and Step write modes
  • Sequences can continue playing while switching between write and play modes
  • CV/Gate outputs let you control vintage analog gear and modular synths
  • Dedicated trigger input for driving internal sequencer
  • Highly portable for music making on the go
  • Robust construction with metal front panel
  • USB bus powered or with 4 AA batteries
  • 24-bit/96kHz stereo in/out USB audio interface
  • Control information may be sent and received via USB and MIDI
  • Built-in powered mini speaker for instant gratification
  • Compatible with optional Roland K-25m Keyboard unit

Nail those classic TB bass lines with the Roland TB-03!

Warranty Info

Sweetwater's FREE 2-Year Total Confidence Coverage Warranty

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  • Save money with FREE parts and labor
  • Get back to making music with the industry's fastest turnaround time
  • Fix it the first time with our award-winning, factory-certified Service Department
Learn More about Total Confidence Coverage

Offer applies only to single-receipt qualifying purchases. Select manufacturers may require that only the manufacturer’s products qualify towards the minimum purchase amount needed to be eligible for promotional financing. Otherwise, an invoice that meets the minimum purchase amount and contains at least one qualifying manufacturer product is eligible for promotional financing. No interest will be charged on promo purchase balance, and equal monthly payments are required on promo purchase until it is paid in full. The payments equal the amount financed divided by the number of months in the promo period, rounded up to the next whole dollar. These payments may be higher than the payments that would be required if this purchase was a non-promo purchase. During the last month(s) of the promo period the required monthly payment may be reduced due to the prior months’ rounding. Regular account terms apply to non-promo purchases. New Accounts as of 07/31/2025: Purchase APR is 34.99%. Penalty APR is 39.99%. Min Interest Charge is $2. Existing cardholders: See your credit card agreement terms. Subject to credit approval.

Offer applies only to single-receipt qualifying purchases. No interest will be charged on the promo balance if you pay it off, in full, within the promo period. If you do not, interest will be charged on the promo balance from the purchase date. The required minimum monthly payments may or may not pay off the promo balance before the end of the promo period, depending on purchase amount, promo length and payment allocation. Regular account terms apply to non-promo purchases and, after promo period ends, to the promo balance. New Accounts as of 07/31/2025: Purchase APR is 34.99%. Penalty APR is 39.99%. Min Interest Charge is $2. Existing cardholders: See your credit card agreement terms. Subject to credit approval.

The estimated required monthly payment shown which excludes taxes and delivery equals the amount financed divided by the number of months in the promo period, rounded up to the next cent. During the last month(s) of the promo period the required monthly payment may be reduced due to this rounding. These payments apply only with the financing offer shown. If you make these payments by the due date each month, you should pay off this amount financed within the promo period, if it is the only balance you are paying off. If you have other balances on your account, this payment will be added to any other minimum monthly payments.

Applies only to select items from this manufacturer. Ask your Sweetwater Sales Engineer for more details.