1954 Edgar Villchur and Henry Kloss release the AR-1 speaker for Acoustic Research. It is the first acoustic suspension loudspeaker, allowing for miniaturization in speaker design.
1959 Arthur Janszen (with Henry Kloss) releases the Model Nine loudspeaker  for KLH Research, a full-range electrostatic speaker that is still revered by audiophiles.
1961 HH Scott releases the 350A, thefirst commercial stereo FM radio receiver.
1970 Advent Corp.’s Model 200 cassette tape deck  brings Dolby B-type noise-reduction technology to the masses. It also was invented by Henry Kloss.
2005 Harmonix Systems’ “Guitar Hero”  real-time music video game (“Rock Band” would come out two years later) is a technical tour de force. Alex Rigopulos and Eran Egozy, the company’s founders, had met at MIT’s famed Media Lab.