the new maggies are hot on the treble if anything.Indeed on the 3.3/3.5/3.6 series. Unless the system has a severely rolled off top end, a power resistor value of 1-2 ohms is a must on the tweeter attenuation terminal.
Do the older models also have such terminals? If so, is there a resistor there? And if so, try a lower value or none at all.