On the Rogue 99 pre amp you can put the Halos on the two left tubes (looking from the front) in the phono section and get 90% of the benefit. According to Mark Obrien these are the main tubes that have to do with sonics the other tubes are used for another part of the circitry.
I use the Audio Research tube dampeners and agree with the improvements, the sonics tighten up and are cleaner. TAS (or Stereophile) did a review on them as well and thought they were one of the better deals out there.
I use the Audio Research tube dampeners and agree with the improvements, the sonics tighten up and are cleaner. TAS (or Stereophile) did a review on them as well and thought they were one of the better deals out there.