Keep in mind it is relatively easy for a few guys to run a small to medium sized business themselves and be extremely successful. However, making the transition from medium sized to very large is very difficult. It takes a massive investment in people, property, legal council, manufacturing, borrowed capital, and potentially investment. A leader's ability to ensure quality control is pretty easy when he or someone directly reporting to him can inspect every piece coming off the line, but when the line is producing so much that it takes dozens of people to ensure quality, well, good luck. The same goes for customer service. While you can train and monitor five to ten people in how to make the right decision concerning technical support issues and get an amazing reputation and still make a healhty profit, it is nearly impossible to do that with 15 or 30 people doing that job. You run the risk of over committing to customer satisfaction and losing all profits, or under committing and losing happy customers. Not everyone can understand all the caveats to making good decisions on how to support customers.
I am no expert, nor do I have any insider information, but it is my belief that SVS could very well be having those very same growing pains which make it very hard to stay ahead of the game and impress all their customers. They could have chosen to remain approximately the size they were two years ago and just sit back with a decent salary and happy customers and limited exposure, or they could have chosen to become the next Carver or Polk Audio or NHT - all former startups who did pretty good for themselves at one time, but all of which have collapsed from their former glory (if not giving up the ghost altogether).
I repect anyone who can successfully make that transition from a 25 to 50 employee company into an international corporation with hundreds of employees. It is an extremely difficult task, and very few have ever succeeded.