I used to own a Line 1 and McCormack DNA 1 dlx for two years and never percieved this combination as having a lack of PRaT. Plenty of verve on hard driving rock. That said, the DNA-1 would start to swamp when pushed to hard on complex music with my B&W 802 S3s.
I would agree that something else needs to be addressed; speaker placement, mains, cabling, source, fresh tubes, etc.
I would agree that something else needs to be addressed; speaker placement, mains, cabling, source, fresh tubes, etc.