'89 Acura Legend, did Big 3, need some advice (possible Alt. problems)

Ok, so today I reconnected my Big 3 wiring, cranked up my car, and my system was BOOMING. So much, my roomate came outside and commented that I must have finally fixed it. The grounding points on the chassis of my car weren't nearly as good as they should have been because I had failed to remove the primer layer.

So I was thinking everything was good, until an hour or so later I go crank my car and head to a restaurant, and the system is back to its old weak ways. When I turned the car on, I also noticed that it wasn't booming as much as it was earlier.

The only thing I can think of that would have made it boom after redoing the connections is the fact that I had my battery disconnected for about 45 minutes while I put back in the wiring for the big 3. Is there any reason why having my battery disconnected for a while would make such a big difference?

I was thinking that my amp ground might not be as good as it should, but wouldn't something like that drain my battery while the car was off, leaving me with a dead batt?

Any input would be appreciated!

 
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