Mark RumreichMark Rumreich is a senior design engineer for TLC-Thomson Electronics who specializes in analog and digital audio and video systems and circuits. He has written numerous articles for Electronics Now, Speaker Builder, Radio-Electronics, and Audio Amateur magazines and taught seminars in loudspeaker design and automotive acoustics. Mr. Rumreich holds more than 20 U.S. patents and received his master's degree in electrical engineering from Purdue University. Read More Read Less