In case anyone is curious, here is the whole system. \n\nI'm not an audiokarma member, so I guess I'm SOL on that.\n\nIt seems like everyone has given up on you.:o You stated in your first post that when the Eminence was used exclusively that the crackling sound went away. This alleviates the bad cap theory.\n\nI have some more questions about the system to maybe better understand the problem. When the crackling occurs is it during a peaks from the source recording? Which preamp are you using to connect to both the Eminence and Citation amplifiers? How are the two amplifiers connected to the preamp? Low level distortion, like crackling is usually low level electronics clipping. It's possible that by connecting two amplifiers to the same set of stereo preouts is putting too much of a load on your preamp's output. \n\nGiven what you stated thusfar it would be the most logical scenario based on that the problem went away after you connected just the one amplifier. You also stated you have a power conditioner. I don't think you are losing high level power anywhere.