There was a thread here a few days ago, and in it someone asked what amp Santana used at Woodstock. I thought he used an Acoustic, as several are visible in the backline on the video, but apparently he used the early Gallien-Krueger. That's interesting. I know little about Santana's amp history.....the amp I most associated with him was the early Mesa Boogie.....but of course, they weren't around at Woodstock. Thanks for the info.