The sound from your Galion TS A20 amplifier may be as good as the company's web page exults. Still, it is a 20 watt amplifier. Despite my experience that a low-power class A amplifier drives speakers well beyond the limits you'd think from the specs, the Atalante 5 more or less signifies the limit. That is, other candidate speakers are "horizontal" replacements for them, like some of the Spendor Classic models.