[Drew68]

There there is the Dumble Overdrive, a Holy Grail-type of amplifier made by hand by its eponymous inventor and only when he feels like it. No two alike etc. Tens of thousands of dollars.

And a 10+ year waiting list to get one built. And if you piss off Alexander Dumble by asking him if he's started building your amp yet, he'll send you back to the bottom of the list.

Anyways, it couldn't have been a Dumble on this 1976 track. Santana didn't get his until after he saw Stevie Ray Vaughan playing through one.

[relictele]

Right...almost certainly a Boogie.