A wider bore, by comparison to the more traditional bore. Greater projection and a bright, full sound. Through intensive research and development, Yamaha have ensured that this wider bore has not compromised on the SEVR’s even scale, resulting in an instrument that is versatile, broad, and joyous to play. Yamaha’s commitment to craftsmanship means the SEVR is beautiful, robust, and ergonomically designed for outstanding performance. With Eb lever.