Yamaha GSP100 GS processor Released in the 90s. This is a half-rack size guitar sound processor. It can create a variety of sounds, from clean to natural distortion and hard distortion. Power adapter not included. This is a used item! There are scratches, but there is no major damage. Please purchase as-is, no returns. Due to a business trip starting next week, the sale of this item will be temporarily suspended. Please be aware of this if you are considering purchasing or requesting a price reduction.