My husband is the second owner of ML Sequel II speakers. One speaker won't play and may have water damage from a busted pipe; the fuse was checked and is ok. The other speaker has very low sound and I don't believe it got wet. Can the speakers be repaired? How do I go about it? If I wanted to replace them, what is the comparable ML speaker today to Sequel II speakers circa 1990? I want to know what value to set for them.