I would think his tone comes primarily from his hands and his mind but in that particular video it looks like there might be an ampeg amp in use.
He was playing a Fender Jazz Bass and using Aguilar amplication (not sure what model specifically) when I saw him play almost a year ago. Great tone, playing and energy.
I had the privilidge of meeting Reed in a great venue due to us opening for the the openers he was playing w/ Tea Leaf Green. He was a very nice guy; I recall him mentioning that Winterwood was his favorite JFJO album.
Hope that helps.
