I have the 8532 phantom power modules/adaptors and the Nady cbm40s(used with a ps2). While the AT boxes do give you about 145 db of spl handling ability,yes..that much, they do not sound *nearly* as good as the Nadys/Denecke ,those giving you about 138db to work with. They do have a R/O, and it is switchable.
Like described above, they sound *extremely* flat.