Audioquest is bright??

this possibly shows that the previous speaker cable may have been less revealing & was perhaps covering up something else. If new, first break the replacement cables in for a good 2 to 3 weeks.
Then I might also check elsewhere to find out if the actual source of your brightness is coming from otherwise, rather than just covering it up.
Source component
AC cord
Line noise conditioner
Signal interconnect
shelving cones & footers
Right now you really don't know where you're at, & should perhaps consider some other experimentation. If all else eventually fails then I'd suspect an amp + Granite + 804 synergy issue, but not right away.

Thanks. Hi Bob, it is the power amp. I was surprised reading a post here recently where someone said AudioQuest was bright. Hence my post here. Being solid copper with no silver plating and insulated strands, I would think Granite is as un-bright as one could get other than maybe Cardas.
So I will break in some more.

Not sure about the new AQ cables, but the older ones used all solid core conductors that took a longer time to break in.

Hi I am using A.Q. granite double runs biwire with Proceed amp. 250 watts per . and Macintoh 134 as myA/V control center. after about a week the granite was warm in the bass and mid , highs crisp but not harsh . thanks Bill Head