Big Fella said:I once had it explained to me, by somebody who should know, here goes..
The only difference, between a Eb / Bb, and a EEb / BBb, is that the latter has a compensating system.
Not sure how true, but it sounds feasible to me..
Highams said:Yes, it's a term adopted by brass bands when words like 'profundo' & 'bombardon' went out of fasion.