My Beolab 1 makes a squeaky noise as soon as it receives a signal. Initially, this noise used to go away in a few minutes after system start up, however, now it is permanent. My speakers are connected to a Denon receiver. I tried assigning different output to this speaker, i.e. from R to L, however the noise continues, so I believe this has to do with something between the output of the receiver to the speaker drivers. Have you encountered this before? Thanks for your help in advance. 

Sorry if this seems like an ignorant question, but you're not using the power amplifier in the receiver to drive the speakers, right? I ask because of the way you phrased this: "...I believe this has to do with something between the output of the receiver to the speaker drivers." I'm just confused.

Assuming you're correctly using the Denon's pre-amp outs to send signal to the BL1's, it sounds like a Xover or amplifier/power supply type of issue.

Jon

I have correctly connected them to pre-amp. I also called B&O tech support, they also think it is an amp problem. Basically, they will change out the entire circuit board.