I use devices under everything and believe everything seems to benefit, including speakers. I use a range and don't believe myself, you need to use the same throughout.
Herbies products are always good value, I use the Isocups. I also have some Stillpoints and Black Ravioli, a UK product. Both are excellent and better than the Isocups, but a lot more expensive, even second hand. I have used or tried some brands I did'nt like, particularly HRS. In my system, they did'nt have much impact.
I am sure the way to go is to look out for second hand products on the Gon or other sites and just try them out.
Herbies products are always good value, I use the Isocups. I also have some Stillpoints and Black Ravioli, a UK product. Both are excellent and better than the Isocups, but a lot more expensive, even second hand. I have used or tried some brands I did'nt like, particularly HRS. In my system, they did'nt have much impact.
I am sure the way to go is to look out for second hand products on the Gon or other sites and just try them out.