- AR Resonance Top 33.00 Deep U 84 Bronze Tuba; mouthpiece top for tuba; inner cup diameter: 33.00 mm; throat size: 8.4mm (84); cup depth: Deep U; not for the faint of heart, very deep and U shaped, for the biggest and broadest sound; weight: L (light = standard); material: Bronze, silver plated; made in Italy EUR 195.00 - See more - Buy online