Well, which company survived? The K-Horns lack of higher value is mostly based on the difficulty, IMO, of finding them and getting them (transport usually). Couple that with sometimes not being the best sounding (without a lot of modification) and you have speakers that not many people have seen or heard, so the demand isn't as high as others. Compared to the JBL L100 for example, the # of K-horns is small compared to the #of L100's sold, heard, and perhaps easier to acquire or be nostalgic about.
I don't think Speakerlab destroyed the value, but just made it a bit more accessible for some. But ultimately, Speakerlab didn't survive, so marketing and sales weren't enough for them to stay in business.