Other than boutiques, I cannot think of another that built the electronic boards and cabinets from plywood sheets in-house. The only thing they did not do was the raw PC board (toxic... my employer gave up on in-house back in the late 80s due to that), and sheet metal (same reason). The only one exception I can think if is Mesa, but I've heard that some of the sub-assemblies are now contracted out (excluding the IcePower modules). I think they still populate many of the electronic boards in-house up in Petaluma. Almost all, either contract entire amp lines out (usually overseas), or much of the sub-assemblies like the electronic boards. Anybody have some more information on bass amps that are truely made in the USA?