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Mallory [email protected] sound alarm hack help needed

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I have a Mallory PS-953Q alarm that will work with from 7-15
VDC.

PDF

Metal Hardware accessory


Powering it up, it will play its (loud) alarm sound. Has
anyone hacked this unit to quiet the internally recorded alarm
sound so an mp3 player's low voltage signal can be fed into
the unit to play it using its amplification circuitry?

Thanks,

Dr Doug
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