What do you mean with the BUS power?

I have the little B&O power box between BLC and BL3500. 

I really can't imagine where the problem comes from... is there a way to test that?

claudiu wrote:

You need NL/ML Delay box

Thanks for your help guys!

Here a few details: I don't think it has anything to do with a missing delay box, because there's no delay, there's only this cracking noise.

I'm using a Swisscom Internet Box (that's a router of national provider). I don't think that's the problem. I guess the power box could be the problem... If I unplug it and plug it in again, it gets better for a while... I also tried some different power supplies for this little power box, but nothing really helps.

Any other ideas?

A crackle noise generally points to a problem somewhere in the analog chain.  Digital interference generally shows up as drop outs, stuttering or strange noises.  Since it happens with just the Avant sources, it would most likely be something in the ML between the Avant and the BLC.  Do you have other link rooms where you can listen to the Avant sources without problems?  If so, then I'd look at the connection between the ML and BLC.  It could also be a bad ML junction box somewhere or your Avant ML connection is spotty.  Then, there's the crackle you sometimes get when you place your cell phone near an analog speaker - you're not leaving you phone by your BS35 are you?

Oops.  I guess I should read more closely - somehow I thought you had an old ML Avant and problems with a new BS3500 vs. your actual problem.  That being said, I'd still look for a problem in the ML side of the world since crackles do not tend to show up in digital signals.  I doubt if routers or the Avant have anything to do with it.

Thanks Stan... that's what I guess, too. But where in the ML can the problem be, as soon as the crackling is not constantly... sometimes it happens, sometimes not... Actually the last days were pretty horrible.

Maybe some more information can help to find a solution:

• BLC is located in a small reduit, plugged with RJ45 into a ethernet wall socket which goes directly to the bedroom (inside the walls)
• in the bedroom, there's a short cable from the wall outlet to the powerbox
• from the powerbox, there's a 7m cable (RJ45 to ML) to the BeoLab 3500

How can I find the problem? Here any speculations:

• Is it possible that the powerbox is too far away from the BL 3500 or that the powersupply of the power box has to little power (ampere?)
• Could it be a broken ML cable?
• no additional ideas 🙁

Kind regards
Remy