Sound Focus | 149 followers on LinkedIn. SoundFocus is a San Francisco, CA-based startup creating the next generation of personalized mobile audio products. The company was founded by Alex Selig and Varun Srinivasan in September of 2012 with the mission of helping the world hear better. The company is a graduate of the Y Combinator summer of 2013 batch and announced their first hardware product, the Amp case, in October 2014.