The Super 400 is constructed from rose brass, which gives it a complex tone and quick response. The spectrum of overtones is much larger, and the dynamic range is significantly bigger. The large bore and big bell give the Super 400 tremendous projection and presence. Each Super 400 comes with two necks to give the player two entirely different tonal bases to work with. The #1 neck is rose brass and lends a full complex tone with absolutely effortless response. The #2 neck is a special gold brass which gives a brighter sound with more projection and is ideally suited for use with amplified instruments.