AES E-Library

AES E-Library

Air Motion Transformer Principle Loudspeaker Drives

Document Thumbnail

The paper describes new high- and mid-frequency loudspeaker drive units, based on the air motion transformer idea of Dr. Oskar Heil. Improvements concern geometrical layout as well as the use of new materials like capton-aluminium diaphragms and neodyme magnets. The membranes are made of very thin and especially folded diaphragms that are mounted in a strong magnetic field. They do not move air in a piston like action in a 7:7 ratio, but with a 4:7 diaphragm to air velocity transformation, thus improving transient response and dynamics of the system. Design details and measurement results are presented.

AES Convention: Paper Number:
Publication Date:

Click to purchase paper as a non-member or login as an AES member. If your company or school subscribes to the E-Library then switch to the institutional version. If you are not an AES member and would like to subscribe to the E-Library then Join the AES!

This paper costs $33 for non-members and is free for AES members and E-Library subscribers.

Learn more about the AES E-Library

E-Library Location:

Start a discussion about this paper!

AES - Audio Engineering Society