Free Loading

Posted January 6, 2020

Subwoofer_boundaryLoading Take advantage of free acoustical power: always place subwoofers on the floor behind the screen – NOT on a platform with the screen loudspeakers. Floor-positioned subwoofers take advantage of “half-space” loading, which increases radiated power by about 3 dB, WITHOUT adding any extra amplifier power. Even better: place the subwoofers on the floor AND push them all the way back against the solid wall behind the screen. That is called “quarter space” loading, and results in about 6 dB greater SPL, without using a larger amplifier. The very low frequencies produced by the subwoofers have no problem going right through any draping or masking below the screen.

Mark Mayfield

Mark began his audio career in 1979 as a recording engineer working in studios in several major cities. His role expanded to include pro audio systems sales, design, and installation. His cinema experience includes market development and product marketing for several major audio systems manufacturers, including Bose, JBL Professional, and Eastern Acoustic Works, where he managed cinema sales and marketing. He’s also spent 10 years as editor of several prominent pro AV technical trade publications. Mark is on the Board of Directors of the International Cinema Technology Association (ICTA), and has been adjunct faculty member and consultant to InfoComm International, and has provided marketing consulting services for many leading equipment manufacturers. Mark is currently responsible for all marketing programs for QSC Cinema, including advertising, sales support and training materials, trade shows, PR, and web. Mark has a B.S. degree in Psychology from St. Lawrence University and an MBA (concentration in Marketing) from Boston College.