I am not sure about the power of the 899 Integrated, but the P/E's are no SET speaker. I can guarantee that. The monitor itself is a fairly easy load. I played just the monitor with a 60 watt OTL. However, it could not control the bass when played with the full P/E setup. I tried an Art Audio Jota, the version w/ 20 watts. Honestly, not even close to enough power, regardless of how loud, size of room.... If that EAR integrated is not a solid 50-60 watts, I would have my doubts if it were enough for the P/E's. Great speaker though, and certainly worth your efforts. I do think the P/E's like at least 50-60 tube watts.