I have a Project Debut Carbon which is set up to an amp with a preamp. A few days ago a problem presented itself as only one of the speakers is loud enough, the other one being very quiet. If I disconnect the TT from the preamp and connect it to an aux by itself, both speakers work fine (except of course being both quieter than normal because a preamp is not present.) Can anyone please help me solve this? I resothered each colored cable near the RCA jacks but it didn't solve anything.