That’s not really accurate. Amps don’t just matter at max volume – they also differ in how well they control speakers at normal listening levels, especially when the speaker impedance dips. The GLE 90s are fairly efficient, and the Denon PMA-1000NE should already have more than enough power for them in most rooms. If it doesn’t sound right, it’s more likely down to room setup, placement, or expectations than the amp being 'unable to drive' the speakers."