Hi again! The cooling fins don´t seem to get any hotter on the humming one. In fact neither of them a is particulary hot. The hum is still there and if I had a guitar tuner it probably would be possible to check the freqency on the hum because it´s always the same. Very annoying when playing at low volume.

Ok! I guess this is for my workshop. Are these idle current trimmers standard components or do I have to get them first? Also, do you have a capacitor kit ready for the pentas?

I haven´t thought about that. Have to check tonight. If this is the case, what's the problem? Solution?

Hi! It's not from the drivers, sounds more like a resonance from the bottom. It's always at the same frequency but increases in soundlevel when the speaker have been turned on for a while.

Ok! I have penta II. Are there different kinds of transformers in the pentas? Is this a doityourself job or something for my workshop regards

Hi again! I just noticed that the humming doesn´t start at once when the speaker are turned on but after 10-30 minutes. Is this a capacitor thing maybe?

Hi! One of my penta II:s just started to hum. Only when turned on and always at the same level. Raising volume doesn't affect the humming. When muted or turned off (stand by) it goes away Any suggestions regards

Sorry! Jusdt found the powerlink sockets on the underside of the mcl2av 4000:s here we go embarrasing though but thanks everybody

" The kit comprised a MCL2AV unit and a MCL transceiver" As I have both the mcl2av and a transreciever I still don't know where to connect the powerlink from beolab 4000. Only cd, tape and tv sockets on the mcl2av????? regards

I also have a mcl2av box but it only has Tape CD and Tv sockets.What to do? regards