Arguably the first sound effect ever used, reverb has long been a favorite of musicians and producers alike for adding warmth and life to recordings and performances. A great reverb tone can make you feel like you are "in the room" as you enjoy an artist's recorded performance, or it can bring a dead-sounding club or guitar rig to life by adding space and dimension that previously wasn't there.
FR-3000V Tube Drive Reverb Unit page at Guyatone 's website...