I believe that isolation and resonance control of hifi components is is a very important, and often overlooked part of a system. There are a plethora of products available, from cheap DIY solutions, to absurdly expensive platforms and racks. Solutions can come in the form of soft and spongey (eg.Sorbathane), to cones made of different materials, to expensive "floating" suspensions (Townsend Audio) and hi-tech pads (Black Ravioli). IMO The material used for the rack or platform, be it wood, glass, laminated glass, marble, granite or slate has an effect on the sound. Different solutions are needed depending on: (a) Which bit of gear is being targeted ie.TT (with/without suspension), CDP/Streamer, Amps (Pre/Power/Valves), Speakers/Sub. (b) The construction of the floor and walls. The idea of this thread is to share experiences as to what has or hasn't worked (for the benefit of others), especially under the electronics (as there has been a lot of coverage in the past about speakers and subs). Although, what I will say about speakers, is whether they should be coupled to the floor with spikes (concrete), or de-coupled Auralex Gramma/Townsend/Track Audio etc. (suspended).