Okay, I can't find anything w/the Larson name. Other than some sort of media consulting firm. However, found a lot on Larsen, but they look totally different. As such, I see that there is not much out there on "Larson" speakers. Taking the grilles off if they are not too fragile would give us a little more to work with. Have you even played them? If so, how do they sound?
Cheers,
Phil