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Joined: Jul 2001
Posts: 3,347
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Moderator-Avaya-Lucent, Antique Tele
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Moderator-Avaya-Lucent, Antique Tele
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Joined: Jul 2001
Posts: 3,347
Likes: 10
70.7V squared / 180 ohms = 27.769 watts
70.7V squared / 30 ohms = 166.613 watts

Together that's 194.382 watt load on your amplifier.

The two speaker lines together should have given you a reading of 25.713 ohms (70.7V squared divided by 194.382 watts)

I don't think your 250 watt amplifier is overloaded by these existing speakers.
And if a single 70 volt speaker tapped at 1.25 watts connected to the output of the amp doesn't give you good volume, sounds like the amp is tired.

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Joined: Feb 2010
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TTT

Thanks for your response

What’s kind of strange is when I had both legs tied together I was getting the same reading as the one leg that had the 30 ohms

I definitely think there’s something wrong with the amp

I also noticed that the second and third floor are getting tied to the amp from a pair of wires from a voice feed
I should be able to correct this

The amplifier used to be at the other end of that voice feed. They moved it downstairs at some point.

Any recommendations on what amplifier I should be looking at?
I think TOA makes 250 W amplifier and that’s as high as it goes but I’m not sure

I’m assuming with the new amplifier providing everything looks OK those speakers can all get tapped down to 1.25 W and will be able to add more speakers because it seems like there is a few dead spots


Thanks

JD

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