The ultimate TB-303 transistor sound comparison
The characteristic sound of the TB-303 has been subject of discussions for years. There have been several discussions especially about the transistors used and their impact on the sound of the TB-303. The original TB-303 was manufactured approx. from Q4 1981 until Q3 1983. During this period of time Roland changed the board design as well as some of the components for various reasons. In total Roland used 4 different types of transistors during production time. This article analyses the timeline of TB-303 and its revisions. Additionally it shows what types of transistors were used during production and how the sound differs from a non technical perspective. Hi-Res-Sound samples are included in the documents section so you can make up your own mind what could be the ideal transistor for a TB-303 or a clone. Because the listening experience is subjective, the conclusion reflects my personal opinion and is not scientific at all. I leave the judgment to you.