A world wide Parts Express refund/replacement for the Dayton B652 is underway. Contact
parts express directly to request a refund or replacement speakers.
I have gotten the new speakers in and they don't suck near as much. A review will be incoming. With this new information the flight of the B652 Stratofortress has been canceled.
I did find a use for the drivers though, using the cheaper and just as awful Monoprice 2 way bookshelf speakers I have started a driver replacement project. You can check out some of the details here: NOprice DIY