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DATS V2 Measurement and Accuracy - True Audio: Audio ...
https://www.trueaudio.com/dats/downloads/DATS%20V2%20Measurement%20and%20Accuracy.pdf#:~:text=The%20Dayton%20Audio%20Test%20System%2C%20DATS%2C%20sets%20a,for%20all%20ten%20measurements%2C%20indicating%20excellent%20measurement%20precision.
APx Speaker Impedance Measurement Utility - Audio Precision
https://www.ap.com/download/apx-speaker-impedance-measurement-utility/
APx Speaker Impedance Measurement Utility. This utility for APx analyzers allows you to make an impedance vs frequency sweep across a loudspeaker, and then see the graph and data results directly in ohms. Clicking Help in the utility will display the complete instructions, including a discussion of the theory behind it.
Measuring Loudspeaker Impedance Using ... - Audio Precision
https://www.ap.com/technical-library/measuring-loudspeaker-impedance-using-apx-derived-measurement-results/
Measuring a loudspeaker’s complex impedance can easily be done in APx500 using derived measurements (available in versions 2.6 or later). This article describes how to do so using the Constant Voltage method, and includes an accompanying APx project. The main advantage of the Constant Voltage method is that the speaker can be tested with a ...
Fresh From the Bench: Audio Precision APx517B Acoustic ...
https://audioxpress.com/article/fresh-from-the-bench-audio-precision-apx517b-acoustic-audio-analyzer
This article was originally published in audioXpress, August 2021. The Audio Precision APx517B Acoustic Audio Analyzer debuted at the end of 2020 as a solution specifically built for the production-line testing of speakers, microphones, headphones, headsets, and the wide range of consumer electronics incorporating speakers and microphones.
Chapter 5: Understanding Impedance In Audio Transformers
http://www.lundahl.se/wp-content/uploads/datasheets/PSW_WhitePaper_Download_Chapter_5.pdf
ern audio products and the optimal noise performance is attained when the characteristic “noise resistance” of the amplifier, Rn, is equal to the source resistance, Rs. While transformers are not required, as in tube circuits, a precision input transformer will optimize the op-amp to the source impedance, which is unequal to the op-amp’s Rn.
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