I have a jl 10w7 in a nice ported box and just recently found out the amp I've been running it off is hugely under powered for it. It's currently being run off a Massive nx3 along with my speakers. I decided its time to get a sepperate amp just for the sub now and as of now it's between the N4 and the 500/1. I'm open to other company's but my price range is 200-300 max. I can get a used 500/1 for this price range or a new N4. The Slash is probably a better made amp but the N4 will offer me a couple hundred watts more of power. What do you guys think?