...the big difference between the original 361 and 301 was the presence of an internal power amp.
Exactly, and a small pile of gold and a bigger head/backache.
Conversation with self: powered box = cost + (more) weight + complexity
Q: Why would any serious working player want a heavier self-powered 301, AKA a 361? Three hypothetical answers:
A1: Nostalgia? Yeah, unless that ain't what it used to be.
A2: They don't, but surely the absence of the 301 is a logical profit maximizer from the board.
A3: Perhaps it is a mystery--an inner corporate cult secret?
It is surprising that the one thing that really made ACC bass amp innovation significant, THE cab, is missing. IMHO, the real glory of all the products ACC once sold was the folded horn, the 301.
OK, set me straight. Everyone but me got a 361 instead of a 301, because the built-in amp and pre were so much better than anything out there in ~1971, right? No? NO.

Excuse me, but wasn't it the cab that really mattered? There were lots of good 200 watt heads in ~1971, but very few good cabinets.
I am sorry to be so scabrously sarcastic, but this is so deeply amazing to me. 99% of all cabs, high or low end (Pace Bergantino), are unpowered for good reasons that any bassist knows. It seems to me that USA-non-"ACC" and PRC-non-"ACC" are controlled by those who have little clue about the bass world, apart from the (commerical) low end and some pseudo-high end nostalgia trip. They do know how to milk a brand, though, uh sorta.
How sad. I wonder if the engineer(s) of the 301 cab are still alive, and what they might have to say about where the heart of ACC bass amplification innovation lies buried.
