I learned a good lesson tonight, never put the cones on the speakers until you are absolutely sure the speakers are placed at optimum. I moved the speakers sideways, away from the heavy drapes and 2 inches further back towards the wall and I was greatly rewarded with a higher bass output. I had a sneaky feeling the drapes were interfering with the speakers output. I hope this is it, the speakers are too heavy with the cones attached to move.
On a higher note, Fragile by Yes never sounded better, and the cd Migration by Dave Grusin sounded very right. Nice taut bass and all the instruments were clearly defined. So the speakers are now 6 inches from the wall. Time will tell.