In reply to:
...many manufacturers such as NHT...etc include proper mid-ranges above or below the tweeters in their high end center channel. They do it, so you won't get these measurement anomalies that you get with the WTW or TWWWT arrangements...
It's interesting that B&W uses essentially the same WTW arrangement of the VP100 in center channels up to the LCR600 S3, which is considerably more expensive than the VP150. Their specs say dispersion can vary by 2db within the LCR600 reference axis, which is about what I measured on my VP150. Just an interesting comparison; most people would consider B&Ws to be decent speakers.
