Hey guys, just upgraded my speakers from the stock ones to polk DB652 in the back and polk DB522in the front. The quality is much better and the speakers sound really nice I just have no bass. I'm looking into getting a amplifier and a sub-woofer but have no idea where to start nor how to install and the best spot to put it. I'm looking for a nice sub and amp that doesn't take up room and could possibly fit under my center console that is currently empty. Looking to not spend that much money less than 300$ for both what are my options? Thank you!