Re: Tannoy Reveal 6D

Lots of knowledge on this thread! I have a pair of Tannoy 6d studio monitors and when I power them up there's an awful crackling noise. The volume knob has no effect and the crackle is present even when the monitors are not connected to any audio source. Does anyone have any idea what might cause this? Has anyone seen it before? In the meantime, with all of the mentions of this horrid brown glue I'm going to start by cleaning the circuit boards up. Thanks guys.