Bose speakers are great for the true quality speaker companies who now offer inexpensive excellent sounding products & make them look & sound like what they are - mass marketed junk. Elac, PSB, Paradigm, Polk & many others all make great sounding speakers for under $1000 that put to shame any Bose speaker.
No cheap single driver can possibly cover the full frequency range of music & Play at realistic volume levels no matter how much its artificially equalized. There are some very expensive that sort of do at moderate levels.
The 901's in their heydays of the 1970's were fun because they could play loud, had a large if very indistinct sound stage & didn't dominate a room's decor but did nothing to keep me involved & wanting to listen more. That to me is the ultimate test for any piece of audio equipment.