Hi all,

I have a challenger LE panel which is pretty much a cut down version of the Challenger 10 panel. I installed a DC siren and strobe and set the the siren type to "DC Volts" in system options.

The issue i have is the siren has a faint tone coming out of it, ive swapped out the siren, put a 1k accross the terminals, defaulted and re-downloaded to the panel have dedicated siren and storbe pairs yet still get this faint tone. Im assuming its the siren tamper detection voltage but would of thought the panel would be set up for this given it has the setting specifically for a DC siren?

Has anyone else had this issue or do DC piezo sirens just not work and only the 8ohm ones do on Tecom?