Tech 21 Sansamp PSA-1 preamp - w/4-space plastic rack case

We had zero expectation for this vintage(?) Tech 21 Sansamp PSA-1 preamp, and boy, were we surprised. SO much gain structure versatility on top - and no matter how we ran it: effects loop, in front of amp, straight to powered mixer - you name it. Unsung, under-rated, blah blah. This one is in Ver Good condition with a little bit of rack rash. All functions as it should, and yeah.. Sounds really good. Ships in a 4 space rack (with front and back covers not pictured) if you want it or we can negotiate slightly lower shipping cost if you don't need it.