I agree with Kennyt. The Aragons have a peculiar grain (sounds wiry) in the upper-mid that detracts from tonal colours throughout the mid-range compared with better amps. But the larger B&Ws tend to need the high damping factor of speakers like the Aragon to be fast enough in the bass. The Krells are less easy to categorise as different Krells sound different. But generally you can get better tonal colours and less grain from Krells than the Aragon, and still have that high damping factor.