Something is obviously wrong! That squeal has the potential to be a tweeter killer, so I would limit your experimentation. Check for solid connections on your interconnects. You might substitute some expendible speakers for your good ones while trying to nail down the problem. Try swapping amp channels to see if the problem travels with a particular channel of your amp, or if it travels with the output of your preamp. Be careful with those speakers though!

[This message has been edited by soundhound (edited June 08, 2003).]