I added quite a bit of SR to my system. From Orange Fuses to HFT’s, Powercell 8 UEF SE, Atmosphere IC’s and speaker cable. All made drastic improvements to my listening experience. I agree as stated the HFT’s help lock in the soundstage. I think I’m at level 2. I don’t have them on my Spatial M’3s but on the walls and ceiling. They come with blue tack so very easy to apply. I would really recommend SR Orange Fuses too.
+1 for Alfred
+1 for Alfred