Xeno Series RGS Metal thickness The heavyweight trumpets have heavier metal through the instrument than the standard weight trumpets. Thicker metal helps the trumpets deliver a darker tone that does not break up with volume.Extra-heavy mouthpiece receiver Keeps tone focused throughout the entire range of the instrument.Reversed main tuning slide Promotes a "free blowing" feel to the horn.Monel pistons Monel pistons are resistant to corrosion and are an ideal choice for professional trumpet pistons which must retain precise fit and smooth action over many years.Hand-hammered one-piece bell A one-piece bell has an axial (lengthwise) seam, making it a continuous extension of the instruments material. This results in pure, uniform resonance and superior tone. A hammered yellow brass bell produces a perfectly-balanced tone with quick response and extra presence due to advanced manufacturing.Hand-lapped pistons and slides Hand-lapping pistons and slides ensures an absolutely perfect fit and seal between the pistons and casing or slide parts. Such a perfect fit helps to achieve smooth air flow and smooth action and improve the response and intonation of the instrument.One-piece drawn leadpipe This type of leadpipe offers excellent intonation, response and proper resistance.Specially treated metal Through research, Yamaha designers have developed a process for treating metal that enables the heavyweight trumpets to deliver more power, better control, and richer sound.Leadpipe thickness A thicker leadpipe helps the trumpet have a better tone and response.Metal Thickness The heavyweight trumpets have heavier metal through the instrument than standard weight trumpets. Thicker metal helps the trumpets deliver a darker tone that does not break up with volume.Metal Valve Guides Darkened sound and improved tonal projection are the result of metal valve guides.