Clean fast highs mids are exceptional and bass is tight and low. I owned the Talon Khorus X before the Firebirds and they were excellent as well. The Firebirds take some work to get placement right and at 330lbs a piece that is not easy even with sliders underneath. Once in place and the massive 5lbs a piece spiked feet into place you’re in for a nice treat. They need to be off the front wall and mine are 5.5ft off mine, the soundstage , imaging , micro, macro detail , timbre etc are state of the art, at $42k retail they are a steal and on the used market you can get them for much less which makes them an incredible deal.

None that can think of unless you consider weigh a weakness at 330lbs a piece they’re not light but I attribute that to a very solid build.