alright guys after going to best buy and testing out speakers for my moms car. i pressed the amplifier button to add an alpine amp to the speakers. the sound difference was amazing. im thinking of a four channel amp with a shallow mount sub in and amping my kicker speakers since my kenwoods suck. im looking at this sub http://www.crutchfield.com/p_575R2SD210/Rockford-Fosgate-R2SD2-10.html?tp=111 and using this amp. http://www.crutchfield.com/p_777M4075/Sound-Ordnance-M-4075.html?tp=35782. or using a loaded enclosure from best buy http://www.bestbuy.com/site/Kicker+-+10%22+Single-Voice-Coil+4-Ohm+Subwoofer+with+Enclosure/9894295.p?id=1218190975541&skuId=9894295. i am also considering only using a mono sub amplifier http://www.crutchfield.com/p_777M1350/Sound-Ordnance-M-1350.html?tp=115 what do you guys think? mono or 4 channel with the kickers amped? thanks a lot for any help.