A friend gave me an old Crate keyboard amp that needs a replacement main speaker. I don't know what kindof Crate it is because i don't yet have it. All i know is the speaker that came out of it was an eminence 15 inch. It does have a tweeter.
So my buddy thinks it was just a standard guitar amp speaker that came out. I do not know if the eminence was original with the amp or not. I do know that the speaker was NOT blown. He took it out and used it elsewhere.
Since by now you can tell that I know nothing about this, based on the limited info I have given you, what should I put in this amp?