Don't get me wrong I love my DD I was just curious how much louder 2 lower end 15s would be it is a great price. If they really do sound that bad i'll just wait till I can get another 3515d. I do have an extra brutus 1605d so I could run both and just get a maxx-link when I got the other sub. Didn't mean to sound like I was complaining about my current setup it sounds good on rock and rap just looking to get a little louder on a budget.