- AR Resonance Top 32.40 Deep C 84 Bronze Tuba; mouthpiece top for tuba; inner cup diameter: 32.40 mm; throat size: 8.4mm (84); cup depth: Deep C; much deeper, C shaped and offers a more teutonic and full sound; weight: L (light = standard); material: Bronze, silver plated; made in Italy EUR 195.00 - See more - Buy online