I can tell you unless you are listening to flutes, the 1500 gets very hot in 2.0 feeding the 100s at full power. A class A or even A/B amp would turn into a puddle without very beefy and expensive heat sinks or less beefy sinks and active cooling.

House of the Rising Sone
Out in the mid or far field
Dedicated mid-woofers are over-rated