I think the last time I heard Bose 901's were at a Pacific Stereo in San Diego.
I dug 'em! Not quite sure if I was still in high school or perhaps, had begun college; however, I do recall how differently the sound was presented compared to my friend's family's AR 10 Pi's :-)
EQ? Oh, yeah...they needed them - lol. But, the sound was enveloping!
You know, it would be fun listening to them again, I think :-)
Vbr,
Sam