After constantly researching and testing many different items, like I often do, I have to agree some customers do say some of these items are strange to even think of trying let alone doing and finding an advantage!
Everything in the systems chain matters.
Its no way these can possibly effect the sound, can they? This is what most customers say when I tell them about some upgrades. When products like these are demonstrated most customers laugh out loud as they can clearly hear the improvement for themselves.
Here is a small but worthwhile upgrade on an already great system, when Dave (The owner of this Sonic Bliss system) heard what they did, well he had to have a set.