The YBB-321/321S is an excellent choice for those who demand a high quality BBb tuba sound, yet must consider their budget. It features a strong warm tone, and is easy to play, with accurate intonation.
Specs
| Model | YBB-321 | YBB-321S |
| Key | Bb | Bb |
| Bell Material | Yellow brass | Yellow brass |
| Bell Diameter | 443mm (17 1/2") | 443mm (17 1/2") |
| Bore Size | 18.5-19.5mm (0.728-0.768") | 18.5-19.5mm (0.728-0.768") |
| Height | 1018mm | 1018mm |
| Valves | 4 top pistons | 4 top pistons |
| Finish | Clear lacquer | Silver-plated |
| Mouthpiece | BB-67C4 | BB-67C4 |
| Case | Included | Included |