Neve made some highly regarded mixer consoles over the last few decades, but that does not mean the circuit couldn't be better- nothing is perfect in this world, which also means that something else can be better, and that price or reputation might not have anything to do with it, as you've experienced.
If I were you though, I would allow the amp and the cables plenty of time (at least 50 hours) to break-in and warm up, as you might find that in that time they have changed.
If I were you though, I would allow the amp and the cables plenty of time (at least 50 hours) to break-in and warm up, as you might find that in that time they have changed.