I had an NHT that was not bad but if you do a search for Subs you will find others like ATC,REL,SV and Paradigm. Been awhile since I researched them out.Go for the lowest freq. that you can find. Closer to 20Hz. the better. I have read that Parts Express has a good DIY Kit. I am going to build my own next time or get a REL. Monitor Audio has another one that has been mentioned to me,but I have read negatives by one person who touted the Parts Express sub over it.
As far as Active or Passive it is always better to use Passive with an Outboard amp in my opinion.
One other thought is do not use the Crossover that is in the Receiver if you use one,but regulate it externally.
Hope that helps and opinions may vary!
As far as Active or Passive it is always better to use Passive with an Outboard amp in my opinion.
One other thought is do not use the Crossover that is in the Receiver if you use one,but regulate it externally.
Hope that helps and opinions may vary!