Quote
Originally posted by Valcom:
Gary,

If the volume increases on a certain number of horns after other horns are removed, this would indicate a power issue. Let's say I was using a 1 Amp, -24Vdc power supply, which will power a maximum of (4) 5W horns. If I have (6) horns on this power supply, each horn will not have a full 250mA current to pull from the power supply. This will result in the horns only outputting at a certain volume level. If I were to remove (2) horns, the volume level of the remaining (4) horns should amplify, given each is able to consume is 250mA current to produce nearly 100% efficiency.

To test this theory in your application, I would suggest measuring the DC voltage at a horn at idle and during a page. At idle the voltage should read 24Vdc and during a page the voltage should be no less than 19Vdc.

Typically, a bad horn will not negatively affect any other horns on the same cable run or power supply.

Good luck and keep us posted with your results.

Valcom Tech Support
Great answer! .... I have always been very happy with your support when i call as well.

John Corrigan
New Phone Systems and Service
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