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Joined: Feb 2010
Posts: 499 Likes: 1
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I am wondering if I can use both 2 Wire 70V paging and 4 Wire 24 V Valcom
By sharing the same output
Customer wants to add additional paging horns to the outside of each building
I am a little concerned about possibly overloading TOA 724 Amplifier
So I was thinking of just using Valcom 24 v paging horns
Just for outside
any thoughts
Thanks
JD
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Joined: May 2007
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Moderator-1A2, Cabling
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Moderator-1A2, Cabling
Joined: May 2007
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What's your load on the 724 Amplifier? How many horns at what wattage do you want to add. Is that TOA a 240 Watt unit? If so, you may have a lot of unused power in there. Put an impedance meter on the circuit and go from there.
Sam
"Where are we going and why are we in this hand basket?"
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Joined: Feb 2010
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Hi Sam
Thanks for responding. Can you recommend and impedance media that I can buy?
I think they have a newer version digital versus Analog
Thanks
JD
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Joined: Jan 2010
Posts: 217
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Joined: Jan 2010
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This is a good impedance meter..https://dedicatedpresentation.com/toa-zm-104-a-impedance-bridge
But I am confused. Are you adding Valcom horns to the TOA amp, or standard 70V horns to the TOA Amp?
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Joined: Jul 2001
Posts: 3,347 Likes: 10
Moderator-Avaya-Lucent, Antique Tele
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Moderator-Avaya-Lucent, Antique Tele
Joined: Jul 2001
Posts: 3,347 Likes: 10 |
If you decide that you want to install 4-wire self-amplified speakers because you're worried that additional 70-volt speakers would overload the existing amplifier, you're going to need an adapter to tap off of the 70-volt speaker line and convert to a suitable impedance to feed the input of the 4-wire self-amplified speakers. Something like V-1095 70V Paging Expander https://www.valcom.com/products/productdetail/v-1095
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Joined: Feb 2010
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Ok
So I guess I’m gonna measure the impedance and see if there’s any more room
I thought I could just double tap the audio output from Algo 8301 and send one into the amplifier for the 70 V system and then one into the Valcom for the 24 V system
I want to add three additional Paging horns to each building I believe each building currently has (1) Bogen 15w horns on out front
Bogen 15w tapped at 7.5
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Joined: Jan 2010
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I still am not sure what you're trying to do, but let us know what your impedance readings are and we can take it from there.
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Moderator-Nortel, Computers, General
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Moderator-Nortel, Computers, General
Joined: Jun 2006
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I'm thinking that if you split the output from the telephone system before the amp that it shouldn't be a problem.
Scientists say that the universe is made up of Protons, Neutron & Electrons. They forgot "Morons". Dave. (CTUB) Canadian Techs Use Bix!
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Joined: Sep 2005
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The Algo should be able to do just what you want. You may need to have 2 Algo units unless you can separate the output on the 8301
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Joined: Feb 2010
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Ok
So I went out to the site with my new impedance meter TOA -ZM -104 I disconnected the speaker leads from the amp, connected it to the meter I never heard tone coming through any of the speakers
The meter immediately went to zero ohms at 10X
Then it went to 10 Ohms I believe I was at 1X
I’m not 100 % sure on how to calculate
But I think I might be using about 200 Watts
Why, no tone I thought this was so you could tell if any of the speakers were disconnected or causing an issue
Thanks
JD
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OS 7030
by Bushmills - 09/03/24 12:42 PM
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