4-valve
non-comp doesn't offer many advantages (to anyone).
- They add considerable weight, which makes them unwieldy to many young players.
- They are considerably more fragile, which always defines more damage and higher repair costs (as well as longer repair delays).
- They don't repair the B natural and E natural tuning enough to be worth it.
- The only legitimately usable on-the-fly pitch (below "low" E") is "low" D (which appears in very few large ensemble compositions.
- There COULD be some advantages, were players to actively operate the 1st slide (such as using 1-3 for C and F, so that the 4th slide could be pulled out far enough to remedy B and E), but students aren't going to do that, and the majority of adult amateurs are not going to do any of that either. Further, if the 1st slides on school tubas work well enough to be able to employ this tack, that slide will fall on the floor so many times each week that - within a couple of weeks - that slide will no longer slide with ease and the slide bow will be 50% flattened.
...but (as we've been told endlessly by a person who privately teaches the best students in schools with the wherewithal to fund private instruction) in Texas (where all students are above average in all ways), none of the above is true.
Recently, I was shown (by a band director who is doing a retirement middle school band directing job in the middle of nowhere in Texas...so middle of nowhere that - to get people to teach there - the town has to furnish free housing for teachers) pictures and a list of inventory...astonishing/fabulous/incredible (yes, really)...enough to easily outfit TWO large high schools with sets of VERY fine instruments... What an epic waste of Texas taxpayers' money.
Three-valve compensating:
It's high time it is brought back for school tubas and euphoniums.
Willson: We all knew it would - nearly immediately - be made in China, yes?