Frequency for speakers + Stereo Error

[click.mine]

Hi all. Well it's been weeks since I touched my system but I have a couple of free hours on hand, so I figured I get to fixing.

I've got 2 minor problems right now.
1st> since the last time i removed the factory radio to install reverse wiring harness for my scosche slc4 lineout converter, my stereo gives me the
"ERROR 001". So basically 50% of the time after turning on the car, the cd starts spinning and after 2-3 minutes of waiting it gives me the error <OR> it shows the songs where it was left off the last time, but doesnt start playing.

2nd> My front speakers are 75watts hooked up to my 90watts amp (infinity 475a), they can handle from 45hz and up. would it be safe if I turn down the freq on the amp from 80 to ooo let's say halfway between 80 and 32, especially since my amp is stronger than my front set.

Much love.
Steve