So I've been planning on installing a sound system in an AirBnB rental unit that I'm working on. Until today the plan was to use a Marantz 2240 along with a pair of Boston A150's. BUT. Today I found this pair of really cool looking speakers. They work. There's sound coming from both the tweeters and the bass drivers, but the bass is really thin. Makes me wonder if the bass drivers need a re doping. The problem is that these are are made to NOT be opened. Anyone have any idea whats inside these things?