Model search
Used Roland TB-303 listings.
Use Brrtz to scan regional used gear sources for Roland TB-303 listings and related 303 searches.
What it is
The Roland TB-303 Bass Line, released in 1981, was a commercial flop as the bass-guitar substitute it was marketed to be — and then became one of the most influential instruments ever made. Its squelchy, resonant filter sweep and quirky built-in sequencer created the sound of acid house, and originals now trade at prices wildly disconnected from their humble origins. It's a single-oscillator mono synth with a sawtooth and a square wave, but the magic is in the accent, slide, and filter behavior that no spec sheet captures.
Buying one used — what to check
Because genuine 303s are expensive and small, authenticity and condition are everything — and clones are everywhere. Roland's own TB-03 (Boutique) and the TD-3 from Behringer recreate the sound convincingly but are not originals, and listing titles blur this constantly, so confirm you're looking at a real 1980s TB-303. On a genuine unit, check the battery compartment for corrosion (leaked batteries are a common source of damage), test every function of the sequencer, and confirm the filter sweeps smoothly. Given the values involved, insist on clear photos of the serial and internals, and treat any as-is original with appropriate caution.
Regional sourcing notes
The 303 is Japanese-built and appears on Yahoo Auctions and Mercari, though rarely and at collector prices — the domestic market is no longer the bargain it once was for this particular box, but clean units and honest condition descriptions still surface. Voltage applies as ever: domestic units are 100V. In Japanese listings look for ローランド (Roland) and simply 303, and weigh the condition vocabulary heavily — 動作確認済み (tested working) and 整備済み (serviced) matter a great deal on an instrument this valuable, while ジャンク (junk) and 未確認 (untested) demand real scrutiny. Brrtz surfaces 303 listings across Japanese and Western sources at once so you can gauge the true market rather than a single region's.
Model terms
Common search terms include Roland TB-303, TB-303, 303 bass line, acid synth, and vintage TB-303.
Category
Primary Brrtz category: synthesizers.
What Brrtz searches
Brrtz searches supported regional source groups for used Roland TB-303 listings and related synthesizer matches, then links users back to original listing sources.
Listing boundary
Brrtz does not sell TB-303s, does not act as the merchant of record, and does not claim source inventory as Brrtz-owned content.