It was almost 30 years ago that I purchased my pair of Bose 401 speakers. I thought they looked really cool and sounded very nice in the show room. What can I say, I was young and naïve...
After some years, being not very pleased with the mid range or higher frequency response, I removed the tweeter and went to a local speaker shop that only sold speaker components. The gentleman at the store took me to a wall that displayed over 50 tweeters and asked me to find mine on the wall. I found mine right away, top left-hand corner which denoted the least expensive tweeter he had in stock. I wasn't totally shocked, but perhaps a bit crestfallen that these semi expensive speakers were made from very cheap material.
The gentleman at the store gave me his opinion; Bose were box stuffers, which meant to say that Bose designed a speaker box and stuffed it with inferior quality materials. There wasn't even a crossover in the cabinet for the tweeters and the drivers!
I kept the cabinets, installed Titanium-domed tweeters, new drivers and crossover, and those speakers were vastly improved for another $200. I still have them today acting as the backup to the backup system in the spare room.
I have encouraged many to avoid Bose at all costs. They are box stuffers that continue to do things on the cheap.