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Topic:
M&S Systems MC602 Intercom
This thread has 10 replies. Displaying all posts.
Post 1 made on Wednesday May 1, 2019 at 17:54
goldenzrule
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Anyone have experience with this system? I walked a house today that had this system. Main unit in kitchen, and intercom stations in each room. These rooms then have ceiling speakers which music feeds through from the intercom system. The only manual I could find online explains how to use it. What I want to know is how it wires. Is it akin to an abus system with the intercom in each room serving as a local amp? Do speaker wires run back to the main unit? I've never experienced an intercom system that also included speakers separate from the intercom components before.
Post 2 made on Wednesday May 1, 2019 at 18:12
Fred Harding
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[Link: google.com]
On the West Coast of Wisconsin
OP | Post 3 made on Wednesday May 1, 2019 at 19:06
goldenzrule
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I can still only pull up on diagram which is not high res enough to see the labeling on everything.  It does look like an aBus style system or at the very least wired as such.  I am guessing the room units either use category cabling or some proprietary cabling.  The hope was that we could use the wiring in place to replace the intercom unit with a more standard DA system of choice.
Post 4 made on Wednesday May 1, 2019 at 19:10
Trunk-Slammer -Supreme
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Wow, M&S is still in biz?


What are you trying to do with this monstrosity?
OP | Post 5 made on Wednesday May 1, 2019 at 19:25
goldenzrule
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On May 1, 2019 at 19:10, Trunk-Slammer -Supreme said...
Wow, M&S is still in biz?

What are you trying to do with this monstrosity?

What I said up there ∆∆
Post 6 made on Wednesday May 1, 2019 at 21:45
tweeterguy
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I used to love ripping that rubbish out. It will be a shielded 22/4 from the room and door stations home run to the master station; if the installer followed M&S “best” practices. There will also be a 120v transformer you’ll have to deal with at the master station plus a really sweet AM and FM antenna stuffed in the wall cavity. Prepare client for retro T&M plus wall repair. Nothing is useable.
Post 7 made on Thursday May 2, 2019 at 10:28
Impaqt
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Amp is all in the main unit. they have like 5 conductor 20 ga wire that goes to stations and just a 20/2 or naybe even 22/2 that feed their terrible speakers.

Nothing really usable for a real system.
Post 8 made on Thursday May 2, 2019 at 22:45
Trunk-Slammer -Supreme
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On May 1, 2019 at 21:45, tweeterguy said...
I used to love ripping that rubbish out. It will be a shielded 22/4 from the room and door stations home run to the master station; if the installer followed M&S “best” practices. There will also be a 120v transformer you’ll have to deal with at the master station plus a really sweet AM and FM antenna stuffed in the wall cavity. Prepare client for retro T&M plus wall repair. Nothing is useable.

I've seen one changed out to something more conventional, but it was an ugly thing, and I'm not sure it worked so well.

It is indeed 22/4 shielded wire, and the back box at the master will have one or two drop in transformers in the can. Depends on if it has the add on CD player.

I installed 1000;s of those things in the 80's. Good for what it was at the time.
Post 9 made on Thursday May 2, 2019 at 23:25
Hasbeen
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M&S used 22/4 going to the room stations and the volume controls.  MS4DCXSC is the proprietary wire.
Post 10 made on Friday May 3, 2019 at 00:10
Neurorad
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Intercom system likely provides the door chime as well. 22/4 run to the front door.

May need a doorbell replacement.

You can extend the 22/4 from the Master Station to another location as needed (with a buried splice), or more properly run new cables.
TB A+ Partner
Believe nothing, no matter where you read it, or who said it, no matter if I have said it, unless it agrees with your own reason and your own common sense. -Buddha
Post 11 made on Saturday May 4, 2019 at 13:31
Trunk-Slammer -Supreme
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Note:

The speakers are 45 ohm, and you would need to deal with the room stations and those tiny resistance volume controls.

As to the door station I've changed them out to a conventional door bell, or to a different system, that ties into the phones, by putting a new speaker behind the door station grille (old speaker is most likely rotted away anyhow).

Fun stuff. Most clients decided to remove all the M&S, and patch the holes.


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