My name is Louis and i am 14 yr. dont let my age fool u i have been playing for 5 yrs. i am currently playing a blessing with an F attachming (B-78).
i need to no if there is a big diffence between a plunger mute and a cup mute.

There is a HUGE difference between these mutes! I personally have 3 different mutes, although there are many more out there, these are the most common. I have a cup mute, a straight mute, and a plunger. Different music calls for different mutes and you just need the one it tells you to have. If you have any questions about the specific sounds or whatever of the different mutes, feel free to e-mail me at shelly13@mn.rr.com
Good luck with your trombone playing! it rox!

Make sure the plunger is clean...words of advice from a veteran