speakers infinty

Hello guys, Im looking to replace my stock speakers in a 2010 impreaza sport. I really dont want to put a sub in it, but I do like my bass. So you guys think these will give me a good about of bass? Amazon.com: Infinity Harman 6-1/2" Two Way Car LoudSpeaker: Car Electronics

i just orderd mine On yours do you have the +2db on or off and how are you powering them? i have a hifonics 75x4 so i dont know if the +2b being on will do more good than bad