First the product is all it is claimed to be, and easy to install (I purchased these for my speakers, my sub-woofer and my two turntables). The sound improvement which is why I purchased these in the first place delivered just what I was looking for -- a way to create a more synergistic resolution of the bottom end from the sub to my two main speakers. I'm in a loft area with wooden floors so the bass was boomy rather than tight which made it seem, rather slow and there was an issue with (Pre-Stack) Sound Stage depth. All this is now corrected. Also the customer service was great.
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Stack Audio is a UK-based manufacturer of high-end audio components.
