While i can't offer direct comparisons between any of the gear mentioned, i can offer some notes that i've cobbled together.
Musical Fidelity gear has a family sound i.e. it is all voiced the same. To me, that sound is relatively lean and lacking output in the warmth and bottom end region. While i think it sounds nice on some classical recordings, especially "chamber music", i would not expect strong or full bass from any of their gear. Obviously, one would have to take the sonic signature of this ( or any other ) gear into consideration when building a system. With that in mind, i would think that this product line would not offer you what you were looking for.
Analysis Plus was phenomenally lean and bright sounding with jagged highs in a couple different systems that i tried it in. Obviously, results may vary from system to system and that is why i tried it in two very different systems. Others that heard this cable in my two systems refused to even try it in their systems. Even my girlfriend commented on how glad she was when i took the Oval 9's out of the one system that she uses. To me, this product gets my "ALL hype, no substance" vote.
In plain English, i found it to do REALLY bad things to the sound of my system as a whole i.e. it was a big step backwards. This may be causing part of the problem that you are hearing, i don't know. Obviously, this is a personal opinion based on my experience with the product. Others may have similar or contrasting opinions depending on system synergy.
I don't know what you are currently using as an amp or what you have tried in terms of speaker cables in the past, but you might want to at least try some different speaker cables prior to dumping your electronics and starting all over again. Sean
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