They're rated at 300W nominal but they don't sound great at that power level. It just means they won't ignite. Practically it doesn't matter because no one will play them at that nominal level.

You won't have any problem particularly given you are using them as surrounds.

For those who don't play music at party levels, the ADA-1000 is enough in a small space like my 1900 cu ft living room. But the 1000 doesn't have the peak power capability to enjoy them loud. My 1000 kept cutting out during peaks of well-recorded material. The 1500 had absolutely no problem in any room.

The only time the 1500 shut down was when I had them stacked one on top of the other and wired in parallel. Peak levels were hitting 109dBC at 14 feet away and that's more than plenty. My ears certainly can't handle that. I had my shooting muffs on. It's also a very unreasonable load and certainly below the minimum published spec of the 1500.

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