Should I choose a deep cup for my trombone mouthpiece?

When finding your best option for a trombone mouthpiece, cup size does make a difference! If you are playing on a large bore instrument a deep cup is traditionally what you want. If you want the big sound from a deep cup, but a little more projection, try the Denis Wick 4ABL or 5ABL which houses a standard deep cup, but the projecting backbore of a 4BL or 5BL.
Get more details on the Denis Wick App: www.deniswickapp.com