Aquila 166U - Thunderbrown Series, Bass Ukulele / U-Bass String Set - 5-String, 23 - 26 Scale – Power, Innovation, and Consistency

This model brings a deep, upright-bass-like presence to 5-string bass ukuleles (23–26 inch scale) while staying compatible with U-Bass style instruments. Players seeking to eliminate the 'sausaging effect' and upgrade modern playability will find this set advances ukulele bass technology. A distinctive blend of materials and expert engineering results in a bold, even sound and effortless playability across all strings.

Unique Bio-Elastomer and Copper Engineering

What stands out in the Thunderbrown Series is the use of plant-based bio-elastomers and a copper-infused plastic blend, customized for each string. Consistent, powerful tone can be achieved even when playing acoustically without amplification.

Who Should Choose the Thunderbrown Series?

The YRS-23 is ideal for bass ukulele players demanding stable tension, excellent acoustic projection, and an even feel from string to string. Anyone upgrading from Thundergut or Thunderblack will notice a firmer response, which is especially suitable for slap and slide techniques. Upright bass depth is available in a compact, acoustic-friendly format.