Home Intercom Retrofit
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Posted by on May 17, 2005, 12:37 pm
Please log in for more thread options I recently moved into a home with an old M&S Model 350 intercom. The Speakers all seem to work ok, but the master unit is in bad shape. It doesn't turn off the program/set time buttons do not work. I found the DCM3-4 unit online as a retrofit replacement. This looks like it'll work, but everything I see regarding the installation indicates that I have to replace ALL the Speaker stations as well. After inspecing one of the speaker I'm puzzled as to why. The unit is extremely simple, the speaker with a switch to toggle between a speaker and mic setting. Can anyone tell me why you would make the old speaker incompatible with the old system. Thanks | ||||||||||||||||||||||
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Posted by Robert L. Bass on May 17, 2005, 4:07 pm
Please log in for more thread options That is correct. The old room station speakers are not compatible with the new DCM3-4 system. > After inspecting one of the speaker I'm
> puzzled as to why... It's just the way they designed the new system. A cynical person might be inclined to believe they just wanted to sell more new stations. I spoke to my M&S rep and he seems to think that's the reason, too. If you need help configuring a setup, feel free to contact me. I carry M&S though I haven't put all of the components online yet. -- Regards, Robert L Bass =============================>
Bass Home Electronics
2291 Pine View Circle Sarasota · Florida · 34231 877-722-8900 Sales & Tech Support http://www.bassburglaralarms.com =============================>
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Posted by Art Todesco on May 17, 2005, 8:31 pm
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One answer might be, emphasis on the "might," is that some systems use 45ohm speakers and some use 4ohm speakers. Will this be a show stopper? Maybe. It depends on amp power, etc. If it were me, I would get a schematic of the new, and if you can, the old, and go from there. Robert L. Bass wrote: >>I recently moved into a home with an
>>old M&S Model 350 intercom. The >>Speakers all seem to work ok, but the >>master unit is in bad shape. It doesn't >>turn off the program/set time buttons >>do not work. >> >>I found the DCM3-4 unit online as a >>retrofit replacement. This looks like >>it'll work, but everything I see regarding >>the installation indicates that I have to >>replace ALL the Speaker stations as well. >
> > That is correct. The old room station speakers are not compatible with the > new DCM3-4 system. > > >>After inspecting one of the speaker I'm
>>puzzled as to why... >
> > It's just the way they designed the new system. A cynical person might be > inclined to believe they just wanted to sell more new stations. I spoke to > my M&S rep and he seems to think that's the reason, too. If you need help > configuring a setup, feel free to contact me. I carry M&S though I haven't > put all of the components online yet. > | ||||||||||||||||||||||
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Posted by Robert L. Bass on May 17, 2005, 5:07 pm
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> One answer might be, emphasis on the "might," is that some systems use
> 45ohm speakers and some > use 4ohm speakers... True, M&S does use 45-Ohm speakers. 45-Ohm "speaker only" stations from the old system can be used with the new system. However, anything with "talk" / "listen" buttons will need to be replaced. I spoke with M&S tech support and they confirm this. -- Regards, Robert L Bass =============================>
Bass Home Electronics
2291 Pine View Circle Sarasota · Florida · 34231 877-722-8900 Sales & Tech Support http://www.bassburglaralarms.com =============================>
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> old M&S Model 350 intercom. The
> Speakers all seem to work ok, but the
> master unit is in bad shape. It doesn't
> turn off the program/set time buttons
> do not work.
>
> I found the DCM3-4 unit online as a
> retrofit replacement. This looks like
> it'll work, but everything I see regarding
> the installation indicates that I have to
> replace ALL the Speaker stations as well.