Describe the room & all the equipment including cables, & the best A or AB you found "equal" to the Fusion Amp. Was it your room or someone else's? IMO, with all due respect, without the above information, your statement is meaningless at best & misleading at worse. That is just my opinion, 2c worth & not even that. ...
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This is a comment we would all do well to remember, because it's ever so true, and we all tend to forget to mention these most relevant factors.
For example, my own room, the one I was relegated to (by local terrorists, wife and son, but which still beats the garbage bin

Should I call in Dubya?

) is small - app. 13x9 feet, and contains a fair amount of furnishing. Carpet on the floor, drapes along the 2/3 windows (window takes 2/3 of room length). Worse, the architecture is such that I must use 2x20 feet of speaker cable, because I sit on one end and the speakers are at the other end. Hence my use of hefty van den Hul 352 Hybrid cables (2x256 strands of silver plated OFC copper mixed with carbon fibre, current capability over 200 amperes).
To play right in that room, the speaker really has to be something. It is ruthless in exposing anything wrong, and the power to show it up is there, 2x180W/8 ohms. About the only living thing happy with that room is my tomcat, Nosy, who slides in, kinda drops into the armchair and sleeps off a wink or two (2-4 hours; that cat knows how to live!).
Cheers,
DVV