Diamond Audio D612

This thing is kind of a let down. It is very clear and clean, yes. But for 600 watts, this sub is way too weak. It gets fairly loud, but it just wasn't as deep as I was hoping for. Maybe it just needs time to break in, but I must say I was not very impressed. Not to mention, my friends Alpine Type E was nearly as loud as this thing. The Diamond is a very clean sounding sub, but for loudness. It's not very good. I wasn't expecting King Kong but this thing barely beat an entry level sub. SAD.