Whats the difference between the Audio control epicenter and soundstream?

I want to get a bass knob to add more bass to songs or to have control over the bass but the epicenter cost 160 bucks while the soundstream cost like 60 dollars. Before i buy any of these i want to know what the difference is though? I like really loud bass so please help meWhats the difference between the Audio control epicenter and soundstream?
Will an epicenter is not going to help you much. Shop's will sell you a epicenter telling it will help boost your bass, That's a Myth. Epicenters are used to put bass tracks on songs that don't have one.or restore a bass track that was removed like if you use a ipod player the don't store the full bass track . Example . If you like metalica an epicenter will help because they don't have a bass track in there music unlike Rap music has. So in this case it would help. On bass cd's it almost as useless as boobs on a rock.Both the epicenter an the soundstream do about the same thing. They also do something else. They act as a rca amplifier they jack up the signal from the radio most radios have a 2 volt to 3 volt signal output at the rca jacks on the radio. This is what the amps use to drive the speakers an subs. The stronger the signal the louder the amp. But there's a down side. The stronger you make the rca signal the more distortion you get an the harder the amp has to work. To much input will over drive the amp much like running your car a 8000rpm's redline then hitten the nos. something going to blow. What I would try first is this eq. over the years I've sold 100's with good outcome an the systems hit harder. This is just something to think about. I hope this will help you .Whats the difference between the Audio control epicenter and soundstream?
dude ive asked this question before and no one was able to answer it but am just going to tell you what one of the homies said%26lt; that it was the exact samething as the epicenter and he had the soundstream bx-10 ..i am also thinking about getting it