I have the Algonquin (outdoor) version of the M3s and am still really amazed at the bass they are capable of. I now have them running in the room next to my home theater, through my same Denon receiver on Zone 2. The first time I was listening to music on the M3s, I actually went into the theater room to check if my EP-600 was turned on as it just seemed like too much bass from a bookshelf speaker. They have a very nice neutral sound. I'm going to have separation anxiety when I finally move them outside!
Jason
