The subject of this paper is an audio power amplifier in which a number of principles have been combined in order to obtain very good performance at a reasonable price. The principles are not new themselves, but the combination has led to results which certainly may be called interesting. First a brief review will be given of the reasons that led us to the use of single-ended push-pull circuits and the development of a high impedance loudspeaker. The suitability of this system for a combination of positive and negative feedback will be discussed. Detailed circuits are shown and a method for calculation of the distortion figures will be indicated, first for a simplified circuit, and then for the amplifier as it has been built. The measuring results will be shown and discussed. Finally a demonstration will be given.
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.