A power amp definitely makes a difference in your stereo setup . I was using a NAD integrated amp on my focal 906. Last week I added an O & B power amp to the setup . i felt more dynamics , 3d sound and also felt more deep bass . i would definitely suggest you to check on O&B amp they are worth every penny.
check out here
https://oandbco.com/
i will definitely post a review after some days