Used Keilwerth ST90 SERIES IV Alto Saxophone

This Keilwerth ST90 Series IV alto saxophone delivers a rich, resonant tone that makes it a standout option for advancing students and developing players. Known for their comfortable ergonomics and expressive response, Keilwerth horns offer a playing feel that encourages strong technique and musical confidence. This model provides a smooth, even scale and a warm voice suited for concert band, jazz, and solo performance.

The ST90 Series IV is built with Keilwerth’s characteristic attention to detail—durable keywork, stable intonation, and a lively core sound that responds well whether you're practicing or performing. Players often appreciate how these horns bridge the gap between student and intermediate instruments, giving more depth and projection without sacrificing control.

All of our used gear is thoroughly tested and evaluated in-store before being listed, and we’re always buying, selling, and trading instruments and accessories every day. Be sure to check all the photos for a detailed look at the item's condition, since imperfections may not be listed in the description.