Alarm siren volume very low

[MRK]

Hi,

I've got a Br1nks alarm system, and the volume of the siren is very, very low.  So much so, that it's practically inaudible.

The exterior of the siren unit looks exactly like this: Ademco-747-Indoor-Siren

This used to work before, though I recently had some work done in my house, and the contractors disconnected the siren temporarily, so I'm wondering if it was perhaps reconnected incorrectly, though I would've assumed that it wouldn't work at all if the wiring was incorrect.

Also had a poke around in the control panel (big gray box in the closet), and am wondering if I mistakenly pulled a wire or something that caused this.

Any ideas as to what the cause of this could be, and how I can fix it?

Thanks.

MRK

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[okcalarmguy1234]

if your alarm was going off and annoying your contractors before they disconnected it i would make sure they didnt first stuff something in it