| Movingcoilguy,  sorry I know nothing about the Wharfedale drivers, speakers, nether about the Goodman cabinets. Mau-designed boxes are also very much not my area of expertise. In fact, if you read me than you know that I have a strong attitude against any Lowther-based loudspeakers, where Lowther it tried so called full-range. I had in past a few Goodman drivers but I was looking very different things from them then they were made for. So that entire array of loudspeakers went out of my attention. There is a number of sites and communities stressing the idea of full-range loading, you might try there as they would have more experience with the subject From another side you have said 12,000-15,000 cubic feet that would make over 400 cub meters… Wow! That listening room is very large. Are you trying to load this room with a single Lowther and out of Mau box? I do not even know of I have to put a smiley face here or a sorrow face… What however is interesting is that the methods of sound reinforcement for 15,000 cubic feet room are very-very different then what we are accustom in high end audio. It might be an interesting subject itself but unfortunately I have no practical experience to do anything in such rooms. I know that to make those room to sound right is very difficult – much more difficult then the easy condoled environment of out shoebox-size of rooms…Rgs, Romy the Cat 
 
 "I wish I could score everything for horns." - Richard Wagner.  "Our writing equipment takes part in the forming of our thoughts." -  Friedrich Nietzsche
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