Bluetooth speaker help

[TreesMadeOfTanks]

So i bought the http://www.amazon.com/Sylvania-SP328-Silver-Portable-Bluetooth-Speaker/dp/B00YO2T9QQ/ref=sr_1_1?ie=UTF8&qid=1461391562&sr=8-1&keywords=sylvania+sp328 But it sucks....At the same time its good for waht it dose....I bought it because its loud and i need it too fill large areas with sound...But it sounds terrible when you're up next to it cause it completly lacks bass.....I'm confident changing out speakers i just want you guys opinion....Install a cheapo 4 inch subwoofer on the bottom slot making the config - 1 -  3 way, 1 - Subwoofer....or should i spend like $40 and get some high quality car speakers and swap those out...Also which (Way) Is the best for bass? As in 2,3,4 Way speakers...I read a little about it... 2 way is a woofer and a tweeter, 3 way is a woofer, small speaker, And tweeter...But i'm confused...