YAMAHA - FX550 Guitar Effects Processor

The Yamaha FX550 is a vintage, half-rack digital multi-effects processor released in the early 1990s as a successor to the legendary FX500. Designed for guitar and bass, it uses a 16-bit Simul-Effect architecture to run up to seven digital effects simultaneously, including compression, distortion, equalization, amp simulation, modulation, pitch shifting, and reverb/delay.

A bit goopy on the bottom.