I didn't find an older post regarding 4-valve trumpets, so figured it was ok to start a new one. Please forgive me if I missed it.
I've been researching 4-valve trumpets for some time now and have come to the conclusion that for the most part, it seems like most manufacturers just add one more valve to the trumpet as more of an afterthought than really giving it a thorough and comprehensive technical study it deserves to cater to those wanting the extra valve just to increase their lower range.
I've been looking closely at Stomvi's line of Titan 4-valve instruments and it appears that they have given a lot of thought to it's architecture compared to the competition. I'm wondering has anyone has had the opportunity to play 4-valve Stomvi trumpets (or other 4-valve trumpets in general) and what their thoughts are. Do you see advantages just beyond extending the lower range? Is is a struggle to keep in tune in the various registers? etc.