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Posted: Tue Jul 07, 2020 9:30 pm
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Re: yamaha sousaphone question
Posted: Wed Jul 08, 2020 7:24 pm
I have 3 or 4 yamaha bells
Re: yamaha sousaphone question
Posted: Thu Jul 09, 2020 3:22 pm
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Re: yamaha sousaphone question
Posted: Thu Jul 09, 2020 6:18 pm
I know Jose already sent a pm to saxophyte, but I believe the Yama fiberglass model 301 is a smaller bell throat / body than the brass model 411. Pretty sure the female bell tenon on the 411 is around 7.25" in diameter 
But I think both the 301 and 411 use the same valveset and neck/bits.
But I think both the 301 and 411 use the same valveset and neck/bits.