What is the difference in bach stradivarius trumpet bells?
Standard Bach Stradivarius bell models are 37, 43, and 72. The numbering system refers to the bell flare and rate of taper from the bell tail to the bell. The larger the taper, the more spread/diffused the sound will be. The 37 bell (slower taper) provides a rich, focused sound, with good projection. It is the standard bell on the ML bore Strad. The 43 bell (faster taper than 37) yields a broader and brighter sound, more open blow than the 37. It is the standard bell on the XL bore Strad. The 72 bell (faster taper than the 43) has a strong, powerful sound that is darker than the Bach 37 bell. It is standard on the Bach Strad Vindabona model.
