The late electronics wizard Henry Kloss, founder of Advent and co-founder of Acoustic Research and KLH, devised the concept of the high-performance compact radio back in the 1960s, and he invented timeless products to back up that innovative idea: His classic KLH Model 8 tabletop radio is still sought after, still sounds great, and fetches $500 and up on Internet auction sites. Cambridge SoundWorks, established by Kloss in 1988 and later sold to Creative Technology Ltd., began as a direct marketer of innovative, inexpensive, overachieving radios and powered multimedia speaker systems.