I need a recommendation for a sub. I already have an Adire Rava sub. I am OK with the performance with my 32” JVC CRT TV. Now I bought a 57 Hitachi RPCRT TV. I can not place Rava near my 57” TV because it is not magnetically shielded. My optimal place for my sub is next to my TV because my family room is 12 x 20” and my wife has three couches in the other room. Now my option is to buy a magnetically shielded sub to replace my Rava. My option is a Hsu VTF2 or Polk PSW505 because they are shielded. No SVS sub is shielded. Polk 505 is a 12” 300 watts Continuous Average Output according to Polk website and it has a BASH amp. Would anyone have experiences between VTF2 and Polk PSW505? How much performance I would gain or lose when I replace Rava with VTF2 or Polk 505? PS. I would like to offer my Rava to Ed Mullen for a real performance test if we can arrange for shipping.