Berkeley 4 Valves Euphonium Tuba Rose Brass

i try many Euphonium. but i alway feel not enough air.maybe i am tooold now.but when i play with this new Euphonium,look like i am playAlto horn.easy to rich high and low and don't need too much wind.fromlast 2 years,our horn are getting much better, Valves andpitch are same like name brand one, but only brass is not enough. wetry very hard to make alloy Brass.this is the best formula,also the 4thvalves is using your let hand thumb.when you play A key. just using 4thvalves. fast and smooth.if Mr Sousa have this Euphonium in 50 yearsago, he can make marching much better.