I use the Pure Note Sigma on my FPB300. The improvement is quite amazing.
If fact it was recently suggested to me by an honest dealer that had the FPB400CX for sale, that I would be better off not upgrading to his amp because the new Krells do not allow the use of aftermarket power cords.
You can see my review of the Pure Note Sigma on this site.
Richard
If fact it was recently suggested to me by an honest dealer that had the FPB400CX for sale, that I would be better off not upgrading to his amp because the new Krells do not allow the use of aftermarket power cords.
You can see my review of the Pure Note Sigma on this site.
Richard