The domain name is close enough to the trademarked name to create a serious likelihood of confusion for consumers.
Drew isn't selling speakers. If some consumers bought some speakers from Drew, thinking they were made by Bogen, that 'might' be infringement. Bogen has not lost any sales to Drew.
I also think the degree in which a trademark is famous is part of the equation. I could be wrong but I would be willing to bet that Disney Speakers or Starbucks Speakers would land the OP in more trouble than ARMADILLO SPEAKERS.
A trademark ownership is not a license to kill. Trademark ownership allows 'certain' rights but those rights have limitations. The OP also has rights. If the OP does seek profession advice, I do hope he shares it with us.