Classic BBE 462 Sonic Maximizer. I'm the original owner, bought it back at the end of the '80s and it's been racked in my studio since, and is in excellent condition and working order. Great for an initial quick boost, especially for samples and synths to give them some low-end oomph or high-end sparkle. We used to call it the "magic box" because it just made things sound better, plain and simple. These days I'm just not using my outboard gear as much so it's time to pass this on to someone else who'll get some good use out of it!