Telefunken Tab V76Mpreamp modules in Marquette Audio rack. Often referred to as the "Rolls Royce of preamps", with a big, smooth, full sound. The rack provides 48V phantom power and XLR inputs at rear panel. Also has DI inputs on the front, with each channel fitted with UTC transformers.
Note - the individual output gain and pad switch are disabled on the rack. Instead, the gain is controlled from the modules themselves. Power is set for 120V. These are beautiful tube preamps for your recording studio.