No ideas? That's a shame...

How many are using the old MCL system?

Anyway I got an MCL2 Expander from US as I was planing on doing a MCL setup with my BM6500.

It does not work with Danish voltage 240 but the specs are given as:

117 VC 60 hz 12w for input

12VDC 500mA for output.

As long as it matches the output it should be fine.

If the number of MCL 2 units is increased, or if more than 500 ft. of cable is

used, it is necessary to insert an MCL 2 Expander.

Hi :) Thanks a lot for this.

At the moment I have 5 working ones and I am hoping I can fix the one that's blown, too, so there will be 6 in total using MCL. I've found

According "Master control link handbook" that I have, about Dimensioning says several important points:" additional 12 MCL 2 units can be connected to the MCL2 Expander, these 12 units can be distributed in up to 3 strings with a maximim of 4 units in each string. The total cable length connected to de MCL2 expander must not exceed 450m (3 x 150m). MCL2 expnander should be placed as close to the audio master as possible".

Applicable to the MCL 2A only: "As the speakers in the local rooms are conected in parallel, there is a limit to the number of local rooms in which the speakers can be cut in simultaneously. If too many speakers are cut in at the same time, the protection circuit of the audio master will be activated and either lower the volume or switch the whole system into stand by"

Or

Both should do the job just fine.

Dragos wrote:

I've found link at Maplin, unless I am reading this wrongly and someone is kind enough to say stop before I burn another MCL2A...

BUY THIS ONE! -not the one on eBay!

B&o always having to be different -reversed polarity on the plug from just about every adapter I have ever seen. You NEED to have the center polarity as NEGATIVE (-). The unit from Maplins allows you to do this, the other is fixed -and wrong!

My guess is that played a role in your previous "disaster."

Hey, everyone

Thanks again for all your help - I really appreciate it! I've got a bit further but it's still not perfect... :(

I got the Maplin adaptor, changed the centre polarity to negative, connected the MCL2E box and have managed to to break any more MCL2A boxes so far. Which is great, thanks!

However, my circuit seems to be running fine until I get to the expander box. The 3 MCL2As operate as normal, but once I try and operate the 2 that follow the MCL2E, things are not as good. The transceivers would switch on the sound, but they would not do anything else (allow changing the volume, channels, cd/radio, etc...) The last one on the circuit would then switch off, too, but the one following the MCL2E wouldn't even do that... it's like they don't have enough power to do everything...

When I bought the MCL2As I tested them and they all worked fine (transceivers, too).

What's more weird is that, despite the cable length being 30m (so above 500ft), when I only had 3 MCL2As connected, they were all running perfectly. Now that I am trying to intercalate a few (2 for now but ideally 3) more rooms, it all seems to be going a bit wrong... I am really really confused... What could it be? 500mA not enough for the adaptor? Inside diameter of DC adaptor needs to be a particular one (I tried several and nothing, though... - I have 1.7mm, 0.7, 1.4, 2.5, 2.1, and 3.0). Does the Beomaster need a service in order to drive these additional 2 MCL2As (though I can't see whay that would be...)?

I would really appreciate your advice, guys. Many thanks,
Dragos 

Looks like I may have stumped everyone with this latest development... that doesn't sound good... oh, well, never give up hope I guess...