You may want to use the search function because this exact topic was discussed recently. I have been using a Hafler P1500 for my NS10's for many years.

thanks! will do that.

I use a Haffler P3000 which you can find used all over for $200 or less. The Haffler has plenty power to pop them wuffers if you let it! It's as good an amp as you find at that price... of course a Hot House or Bryston would be su-weeeet but they cost!