The last refinement of the world famous WATT Puppy speakers before the Sasha. Do not believe the nonsense rumor that the WP7 is better. Lead is a very crude and cheap way to enhancement speaker cabinet rigidity. Since they were not allowed to use lead any more, Wilson Audio was forced to use the much more expensive M-material (but also better) for the WP8. The results were better sound but at the cost of 25% higher MSRP. The urban legend saying that the WP7 is better was cluelessly spread by those with beer budget, probably the same people who claim that they could get more fun out of $200 hookers than $10,000 high-end call girls. They must not mind lead poison and STD at all.