Where do you start? HiVi makes enclosures for B&W and several others. They make drivers for many brands of speakers. I could not afford to buy the M1 or the M1b, so I built DIY versions, and they are some of the purest sounding speakers made. I think the price is the reason they aren't as prevalent in the US, when one set cost $60,000 US. In Europe they are very large competitors, but many European speakers don't make it to the US. There are several dealers in the US, so notify them for information and if you live close, check out the show rooms.