Five modern power amplifiers were tested using a complex load with an impedance range of 2 to 8 ohms and a phase angle range of -60 to +60 degrees. Output power was increased at each load setting until the amplifier produced 1% THD at 1kHz. This was considered as the distortion-limited maximum output power of the amplifier. The results are presented in three-dimensional plots and show that only few amplifiers can handle the normally encountered complex loudspeaker impedances without excessive distortion. Also, limiting of output power to a fraction of the nominal power is reported for some of the amplifiers, when the load phase angle exceeds a few tens of degrees.

Authors: Sekiya, Mamoru; Otala, Matti
Affiliations: Harman / Kardon, Inc., Woodbury, NY ; Otamation, Inc., Helsinki, Finland(See document for exact affiliation information.)
AES Convention: 78 (May 1985) Paper Number: 2237
Publication Date: May 1, 1985 Import into BibTeX
Subject: Reproduction
Permalink: https://www.aes.org/e-lib/browse.cfm?elib=11518

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: (CD aes10)   /pp8185/pp8505/2333.pdf

Start a discussion about this paper!