Honeywell Ademco Wave 2 Wave2 Sirens For Home Alarm "siren noise" Questions

...siren should not receive any power when in idle mode (non alarmed state). If you hear any noise, it receives some kind of low voltage. Is it powered straight from the panel or with external power ...

keyless entry etc seems to work ok but no 'woot woot' when you lock/unlock. if you set alarm off lights flash but no noise Battery in the remote control is low.That why remote have low radio ...