Has anyone heard of or have any knowledge of Mariah acoustics? I Picked up a set of LS4's. They use Vifa Tweets, don't know the brand of bass/ mid driver; 8". Surrounds are dry rotted. They look to have had a high excursion surRound but it is no wider than many of a relatively standard width. (possibly a hard to find replacement). Just wondering if they are worth the trouble? otherwise the speakers are mint. Look similar to some old DCM's with the grille cloth sock and oak top and bottom plates with a sonatube cabinet and MDF baffle.