This is a PSE (Professional Systems Engineering) Studio SL Preamplifier made in the early 1990's and in good condition. This is a nice sounding, attractive, very slim stereo preamplifier that was very well made, with a solid power supply based on four separate and discrete stages, an oversize toroidal transformer, and silky smooth volume control. The Studio SL has six high-level inputs and both RCA and XLR outputs. This unit is not remote controlled, you have to turn the knobs yourself.
This preamplifier was well used, but is in good condition. I have all original documentation.