Guidebook Offers New Method for Operating Loudspeakers

Current-Driving of Loudspeakers by Esa Meriläinen demonstrates new process for loudspeaker feeding

KIRKKONUMMI, Finland (MMD Newswire) January 4, 2010 — Current-Driving of Loudspeakers: Remedy to the Fundamental Fallacy of Sound Reproduction Technology by Esa Meriläinen argues that conventional loudspeaker technology is flawed and introduces a new method for loudspeaker feeding called current-drive.

According to Meriläinen, all audio power amplifiers in use today deliver voltage signals despite the fact that electrodynamic speakers respond only to current. Meriläinen argues that virtually all speaker systems have been severely impaired by the diverse electromotive forces induced in the voice coil that corrupt the flow of current. In response, he has developed new design practices and example circuits to operate the loudspeaker by controlled current, eliminating major distortion factors and offering what he feels is a superior listening experience.

“Why have the basic laws of electrodynamics been ignored in the design of all loudspeaker operations?” Meriläinen asks. “These design flaws affect the quality of all sound produced by loudspeakers everywhere and therefore perhaps even the musical preferences and choices of our entire culture.” As a proof, he sets out plain and easily repeatable measurement results of interference effects of which he states, “nobody with any interest in sound quality matters should dare be ignorant of these effects.”

In addition to new concepts for amplifier and speaker design and demonstrative projects, the book also features ideas for modeling, filter design, measurements and protection and provides a useful tutorial on analogue linear systems.

Current-Driving of Loudspeakers: Remedy to the Fundamental Fallacy of Sound Reproduction Technology is available for sale online at and through additional wholesale and retail channels worldwide.

About the Author
Esa Meriläinen is a writer and engineer specializing in applied electronics and measurement technology. He earned a master’s degree in electrical engineering from Tampere University of Technology in Finland and has devoted much of his life to research and experimentation involving current-drive technology.

Esa Meriläinen
Email: [email protected]