I’ve been a bit busy and missed this thread.
I actually owned and gigged the Sunn 415 V baffle along with a Model T head back in the 70’s. My recollection was that it sounded outstanding. I only sold it because the schlep factor became impractical. I was driving a Mercury Capri at the time, and had to remove the passenger seat to accommodate the cab. Played hell with my dating life at the time.
The Sunn 415 is heavy; but, it was sold with heavy duty casters. I forget the weight; but, I think it wasn’t quite as hefty as the Acoustic 361 bottom or the Ampeg 810.
In a similar vein, I ALWAYS crossfire my side by side rigs, either 212’s or my current Mesa 112/115 stacks. Here is a 2 x 212 for example.
View attachment 5309428
This deployment eliminates any combing of the highs and sounds excellent.
I’m a bit surprised by people slagging the Sunn 415 or the V baffling. Both were / are pretty useful IME.