XO BRASS instruments are developed in close collaboration with world-renowned musicians whose preferences and demands of professional instruments flow into the process. Their valuable input and our untiring effort to achieve outstanding playability make each model in our XO Sophisticated Brass range a premium instrument that provides long-lasting joy. Every single instrument is manufactured to the highest quality standards. Musicians will feel and enjoy the pure character of these instruments. XO Sophisticated Brass instruments stand for elegant and ambitious design to satisfy musicians looking for individuality and an incomparable sound.