@driftingbunnies , I agree with charles7...
I own the Atalante 5s. I've run into something similar. When paired with a Class A Luxman L-590axii, they sound very good but not amazing. This has been vexing as they sounded better with a Marantz PM KI Ruby integrated. My sense is the Ruby has far more power to get underneath those drivers. My Lux is 30w Class A. Not too dissimilar from your Galion Class A.