well the official range for trombone is
tenor- 2nd E below middle c to 1st Bb above middle c but almost all players can easily play as low as the 3rd Bb or Ab below middle c to about the 2nd D above middle c. nowadays trombonists are concetrating alot on range expantion so some can even hit the 2nd F or G above middle C.
modern bass trombone is pretty much the same but the in between pedals and normal range range sounds better and most players can go down to as low as 3rd G below middle C.
trumpet in Bb ( to me ) only goes as low as the 1st E below middle C ( concert pitch) but today most pros can go as high as the 3rd E above.
which tuba do you wanna know about? :P
no offence but horn, if you have played it, can have a very wide solid range in my opinion. definitly 3 and a half octaves. :shifty:
and today most trombone players play soprano, alto and contrabass as well ( the've become common once again) do you want there ranges as well? :wacko:
P.S. I live in a third world country where all brass players have day job and only have 3 max 5 hours to pratise and still they have these kinds of ranges so Brass players in the rest of the wrold derinitly have these kind of ranges.
hope this helps...
Janca