All items tagged with impedance (26)

Input-Output Impedance Matching – Or Not

April 18, 2024 by Jan Didden

Input-Output Impedance Matching – Or Not

In analog audio, you often must connect a source to a “receiver” unit. Pre-amp to power amp, phono preamp to an active crossover, the crossover to the power amp, that sort of stuff. Each of these units has an input impedance and an output impedance spec. I often get questions like: “My power amp has 20kΩ input impedance, my preamp has 100Ω output impedance, and maximum load is specified as 10kΩ. Will that work together or will I break something?”. Jan Didden explains all about Input-Output Impedance Matching.

Klippel Updates dB-Lab Version 212 and QC 7 Analyzer System Software

August 22, 2022 by audioXpress Staff

Klippel Updates dB-Lab Version 212 and QC 7 Analyzer System Software

As always, the Klippel engineering team continuously introduces the results of its latest R&D efforts and customer feedback to improve its solutions. Klippel has now released their second software update for the Klippel Analyzer System with various new features for both R&D and QC applications. The update is free of charge for all users running dB-Lab 212 or QC7. It introduces a utility Documentation Module (DOC) for use in dB-Lab, TEDS integration for microphones, and updates for the QC Stand-alone Software.

APEI Modeling and Measurement Session Details Development Using Poroacoustic Simulation

November 12, 2021 by Audio Engineering_Society

APEI Modeling and Measurement Session Details Development Using Poroacoustic Simulation

The AES Audio Product Education Institute (APEI) presents the third webinar on a series detailing the practice and benefits of simulation-driven audio developments. These APEI Modeling and Measurement sessions discuss the role of Digital Twins and how to influence fundamental design considerations, even before the first prototype is built to proof a concept. November 17, Ulrik Skov (Reality Labs at Meta) shares an actual project using a High Fidelity Poroacoustic Digital Twin.

Zero-Ohm Multispeaker System Technology Distributed by Selective Design for North America

October 15, 2021 by audioXpress Staff

Zero-Ohm Multispeaker System Technology Distributed by Selective Design for North America

Selective Design, the company co-founded by industry veterans Todd Sutherland and Eric Nakkila, announced their partnership with Zero-Ohm Systems in North America. Selective Design’s portfolio already includes Nakymatone, Gray Sound, Waterfall Audio, Architettura Sonora, and HTE. The addition of Zero-Ohm disruptive Multispeaker System technology adds a flexible and reliable solution for large scale residential installation projects.

New Speakerbench Online Tool for Assisting in Speaker Design Calculations

June 19, 2020 by audioXpress Staff

New Speakerbench Online Tool for Assisting in Speaker Design Calculations

Speakerbench is a web-based application created by Jeff Candy (San Diego, CA) and Claus Futtrup (SEAS, Norway), combining several special-purpose modules aimed at low-frequency analysis and design of loudspeakers. According to the authors, the online tool is made available to whoever might find it useful, including the loudspeaker DIY community. The authors encourage user feedback and even invite software developers to implement the techniques.

Fresh From the Bench: Dayton Audio Test System (DATS) V3

April 22, 2020 by David Logvin

Fresh From the Bench: Dayton Audio Test System (DATS) V3

After a decade of widespread use, the Dayton Audio Test System (DATS) has acquired an impressive reputation for fast and accurate testing. Now, Dayton Audio has taken the easy-to-use audio test system and improved it in almost every way when creating the DATS V3 Computer-Based Audio Component Test System. This is an ultraportable audio test system that provides a reliable method for collection of Thiele-Small parameters, loudspeaker measurements and component measurements. This article was originally published in audioXpress, March 2020.

Voice Coil Spotlight: The Smith & Larson Audio Analyzers

February 12, 2020 by Dean Rivera

Voice Coil Spotlight: The Smith & Larson Audio Analyzers

The “Woofer Tester” range of speaker test solutions from Smith & Larson Audio is one of those systems that thousands of speaker designers have learned to use and continue to rely upon in their daily activities or hobbies. This review looks at the system's possibilities and compares the company's Woofer Tester 2, Speaker Tester, and Woofer Tester Pro products. This article was originally published in Voice Coil, March 2012.

Back EMF Phase Relationships in Moving-Coil Loudspeakers - Part 2

January 8, 2020 by Andy Lewis

Back EMF Phase Relationships in Moving-Coil Loudspeakers - Part 2

In this article series, Andy Lewis explores the generation of Back EMF in the region of a loudspeaker’s resonance. In this second article of the four-part series, he performs simple “thought experiments” to make qualitative observations about the activity of a moving-coil driver in the region of its resonance. This article was originally published in audioXpress, June 2018

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Back EMF Phase Relationships in Moving-Coil Loudspeakers - Part 1

December 26, 2019 by Andy Lewis

Back EMF Phase Relationships in Moving-Coil Loudspeakers - Part 1

In this article, Andy Lewis explores the generation of Back EMF in the region of a loudspeaker’s resonance. He also demonstrates a method for calculating the position of the moving assembly (or “cone”) relative to input signal, using complex impedance measurements. This article - part of a four part series - was originally published in audioXpress, May 2018

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DATS V3 Updated Audio Measurement Tool for Speaker Designers and Audio Engineers

November 27, 2019 by audioXpress Staff

DATS V3 Updated Audio Measurement Tool for Speaker Designers and Audio Engineers

After a decade of widespread use, the Dayton Audio Test System (DATS) has acquired an impressive reputation for fast and accurate testing. A must have tool for the speaker builder and a very valuable tool for anyone who regularly works with audio equipment, Dayton Audio has taken the easy-to-use audio test system and improved it in almost every way when creating the DATS V3 Computer Based Audio Component Test System.

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