Factory alarm beeps once when cold start and crank takes longer

[azmalu1]

 has only been over the last two days but I had noticed the crank taking longer a few weeks ago. I have a brand new battery and starter. I had all three tested last night. Battery starter and alternator passed basic auto zone test. I also did have aftermarket stereo rewired and I'm wondering if it's related to what fuse they tapped off of.