Hi Mike,
While I don't have your ears, I do generally have experience with Klipsch speakers and I consider them to be generally bright up top.
In regards to the single driver speakers you own, you've certainly got some options.
The Orcas I made pre-2016 used big brass binding posts that rolled off some of the high frequencies. This, along with a lack of stuffing material (which allowed the upper midrange frequencies to propogate inside the enclosure) resulted in a slightly too-rolled-off sound for some of my clientelle (and, eventually, me). So we now make frequency targeted stuffing materials in house (coral acoustic wave breakers) that are specifically engineered to absorb the problem frequencies (and no others) inside the small and large enclosures we make. We also employ newer binding posts and internal wire that are more neutral in presentation.
These are the main components in the Depth of Field Enhancement kit that we sell for $99 to outfit any pair of pre-2015 speakers.
Also, in 2015/16, we released a new fullrange speaker model, the Marlin 3" fullrange, that is voiced much like the Orca, but with a brighter high frequency reproduction and more neutral upper midrange than the Orca because of its faceted aluminum dust cap, thicker paper main cone, and smaller enclosure with a smaller front baffle area.
I do also own a Fix and this too will brighten up the sound if need be.
My own acoustic spaces, amps and sources allow me to not personally need to use the Fix in my systems with my production model speakers (Orca, Marlin, Triton), but the Fix has definitely been useful with other speaker projects that had inherently limited HF response like the prior generation Feastrex Alpha cone drivers, for instance. (the new Beta Cone Feastrex's should be ok without the Fix).
Between all these tools - my upgrade kit for your Orcas, or the Marlin model, all and/or a Fix, you should see some more sparkle arrive in your system toute de suite!
-Clark
