| Post 1 made on Saturday February 20, 2016 at 17:30 |
tomciara Loyal Member |
Joined:
Posts: | May 2002
7,967 |
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I forgot my impedance meter - duh, but I am troubleshooting a system that is down. The back of the amp shows all eight channels set to 70 V operation. Just for grins, checking all the speaker lines with my Fluke ohmmeter, they read about four ohms, every one. Expecting to read transformers under an ohm.
Most of these rooms have four speakers, and I see them likely home run to the amp location and wire nutted in parallel. This reinforces my thought that two 8 ohm speakers are in parallel reading 4 ohms.
What would you expect the input side of a 70v transformer to read?
One amp channel LED shows fault so the amp is down. Want to set the replacement up correctly. Thanks!
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