--- title: History of Speaker Testing and Today’s Best Practices description: Loudspeaker manufacturers now have high-tech tools like Klippel analyzers to test OEM audio products and ensure they work as they are designed to. image: https://blog.miscospeakers.com/hubfs/IMG_0770-Edit.webp --- [Skip to main content](https://blog.miscospeakers.com/history-of-speaker-testing-best-practices-today#main-content) Menu [![misco speakers custom audio solutions](https://blog.miscospeakers.com/hubfs/MISCO%2075th%20anniversary%20logo.svg "misco speakers custom audio solutions")](https://www.miscospeakers.com/) [800-276-9955](tel:+18002769955) - [Get a Quote](https://info.miscospeakers.com/support/get-quote) - Case Studies - [Commercial Sound](https://info.miscospeakers.com/sh-acoustics-case-study-0) - [Gaming](https://info.miscospeakers.com/yfageo-audio-case-study) - [Hi-Fi](https://info.miscospeakers.com/concierge-audio-misco-rms-one-luxury-speaker) - [Musical Instruments](https://info.miscospeakers.com/little-walter-amps-tonespeak-speakers-download) - 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The History of Speaker Testing and Best Practices Published on Feb 13, 2025 by [MISCO Speakers](https://blog.miscospeakers.com/author/misco-speakers) Although the foundational concept of a loudspeaker has not changed drastically in the last century—still consisting of a [voice coil](https://blog.miscospeakers.com/thermal-management-of-speaker-systems), magnet, and cone—the [development of novel materials](https://blog.miscospeakers.com/how-important-are-materials-in-speaker-design) and acoustic engineering methods has accelerated progress. For instance, engineers now experiment with specialized [cone materials](https://blog.miscospeakers.com/speaker-cone-video) like Kevlar, carbon fiber, and advanced cellulose composites to tailor frequency response and durability. [Magnet technologies](https://blog.miscospeakers.com/magnet-materials-in-speakers) have also evolved, using neodymium and other alloys to increase power density while reducing weight. Modern measurement techniques have enabled significant refinements by offering deeper insights into transducer behavior and enabling iterative improvements early in the design cycle. ## Anechoic Chambers and Early Testing Methods During the 1930s, anechoic chambers offered a groundbreaking solution for measuring loudspeakers in an environment free from [reflections](https://blog.miscospeakers.com/handling-sound-diffraction-in-your-audio-solution). At that time, engineers employed a slow-swept sine wave from an oscillator, with a strip chart recorder documenting the output. Rotating the speaker manually to achieve various measurement angles was labor-intensive and vulnerable to operator error, especially since maintaining a consistent orientation for each test point could be difficult. Additionally, small vibrations or minor placement shifts could skew the data, underscoring how precision and repeatability were early challenges in speaker testing. ![Anechoic Chamber for Speaker Testing](https://blog.miscospeakers.com/hs-fs/hubfs/AdobeStock_118700495.jpeg?width=600&height=464&name=AdobeStock_118700495.jpeg) Example of an anechoic chamber. ## Computer Revolution in Speaker Testing By the late 1960s, time delay spectroscopy and Fourier analysis began to reduce reliance on massive anechoic facilities. Greater accessibility to computational resources in the 1980s led to increased measurement speed and accuracy. Over time, industry guidelines evolved to require a full 360° data set, providing an expanded view of how loudspeakers radiate sound in real-world conditions. ## Klippel Near Field Scanner Takes it to the Next Level The [Klippel near-field scanner (NFS)](https://blog.miscospeakers.com/testing-loudspeakers-anechoic-chamber-vs-near-field-scanner) platform represents a major breakthrough in transducer evaluation. Using holographic analysis in the near field, it reliably extrapolates far-field performance without the need for anechoic conditions. After the system is set up and programmed, it collects thousands of data points automatically in just a fraction of the time older methods require. Beyond capturing key performance metrics like linearity and thermal stability, it quantifies distortion and power handling. Because near-field measurements can reveal subtle phenomena that might go unnoticed in a larger chamber, the NFS can pinpoint issues related to driver asymmetry, motor nonlinearity, and small-scale cone resonances. This method is particularly advantageous for optimizing both large and small drivers, including those operated in vacuum chamber scenarios, because it eliminates the need to physically rotate and reorient each sample. [Play Video: What is the Acoustical Measurement & Testing Procedure for Speakers?](https://youtube.com/watch?v=nS4IWrYUWrQ) ## State-of-the-Art Testing at MISCO [Warkwyn](https://warkwyn.com/), MISCO’s testing division, maintains one of the most advanced independent Klippel labs in North America and also serves as the North American distributor for Klippel systems. In addition to [Klippel analyzers](https://blog.miscospeakers.com/oem-speaker-design-loudspeaker-testing-verification-video), MISCO integrates other diagnostic solutions: - **SoundCheck by Listen, Inc.** for end-of-line quality control. Beyond simple pass/fail checks, the system can be configured to measure frequency response, phase, and distortion at production-level speeds. - **True Technologies’ automated Life Test** to determine power handling under both short- and long-term stress, allowing engineers to correlate thermal and mechanical fatigue data with real-world usage. - **LPM and LSI modules** to assess linear and non-linear parameters, 3D displacement, and harmonic distortion. This data illuminates how a loudspeaker performs when driven hard, revealing whether the motor assembly or suspension can handle extreme excursions. - **Suspension Part Measurement (SPM)** to evaluate the dynamic motion of the surround and spider. Minute changes in spider geometry or stiffness can alter the speaker’s resonant behavior and excursion limits. - **Material Parameter Measurements (MPM)** to quantify properties such as Young’s Modulus. This helps engineers select materials that provide the right combination of stiffness, damping, and longevity. - [**Laser Scanning Vibrometer (SCN)**](https://blog.miscospeakers.com/laser-scanning-in-loudspeaker-production) to visualize vibrational modes throughout the audio spectrum, pinpointing areas on the cone or surround that may cause unwanted resonances. [Play Video: What is Laser Scanning and Why is it Important for Speaker Testing?](https://youtube.com/watch?v=xVNCdUiBkzs) ## Ongoing Advancements Speaker measurement protocols are constantly evolving, often propelled by emerging technologies. MISCO is dedicated to staying at the forefront of these advancements, ensuring each transducer meets stringent performance requirements. Although the discipline can be intricate,[MISCO is always ready to recommend the right level of testing](https://info.miscospeakers.com/custom-audio-solutions) to match a project’s unique demands, prioritizing the parameters most pertinent to each application. ## Partnering with Experts for High-Performance Loudspeaker Solutions Achieving the best possible audio outcomes calls for collaboration with a trusted partner who comprehends the nuances of loudspeaker design. Drawing on more than [75 years of experience](https://blog.miscospeakers.com/75-years-of-delivering-audio-solutions-video), MISCO has built a reputation for designing and manufacturing robust, high-performance loudspeaker systems. Whether we’re creating a [custom audio solution](https://info.miscospeakers.com/custom-audio-solutions) for a specialized project or recommending an [existing design](https://store.miscospeakers.com/products?_gl=1*1vvaufc*_gcl_au*MTUwNDI4ODU4LjE3MzM3NTkxOTUuMjg2NjgzODg2LjE3MzkyODg0NzQuMTczOTI4ODUwMA..*_ga*MjA3NjEzNDkxMC4xNzE0NTczNTMx*_ga_T6TL10Z4MH*MTczOTQ2MzA5Mi41NDIuMS4xNzM5NDY1MjY4LjQ2LjAuMTc0MDI1MjcyMA..), our commitment to excellence remains constant. Every product undergoes a rigorous inspection to meet stringent quality standards. By leveraging advanced technologies like laser scanning and performing thorough [end-of-line tests](https://blog.miscospeakers.com/factory-acceptance-testing-video-new-speakers), we ensure that your loudspeakers will excel in demanding applications. If you seek a partner to help you develop superior loudspeaker solutions, [reach out to MISCO](https://info.miscospeakers.com/contact). Our team is ready to collaborate and deliver the tailored results you need. [![loudspeakers-101-MOCKUP900](https://hubspot-no-cache-na2-prod.s3.amazonaws.com/cta/default/14566965/interactive-181881334045.png)](https://blog.miscospeakers.com/hs/cta/wi/redirect?encryptedPayload=AVxigLI4jVO9lZQ1Gjj8ml7zgtMs%2BVrZzeyGg4DAo3X6cEq%2BVG4W14du2OhhAofesm0wA%2FAB1CKCTC80s7fCtg4irGF3aFSvkoPhd%2B4eSlI0Fthxr%2BC4XXsHu8DX9FtPYndy91hYRDjsjn%2Bt9M44kKc1nwP5KhZNKtCu42%2BpI%2BfDglhkNjvzXsWcMd3BRjsZ5Z4n2rPeMmnsYM9nKw5%2Fzop5LM0XxTDaoVNvZRDOdHeKe9VB&webInteractiveContentId=181881334045&portalId=14566965) Tags: [Loudspeaker Design](https://blog.miscospeakers.com/tag/loudspeaker-design), [Audio Testing](https://blog.miscospeakers.com/tag/audio-testing), [Speaker Design](https://blog.miscospeakers.com/tag/speaker-design), [Loudspeaker Testing](https://blog.miscospeakers.com/tag/loudspeaker-testing) [Back to Blog](https://blog.miscospeakers.com) ## Related Articles [![How Laser-Scanning Vibrometers are Used in Loudspeaker Production](https://blog.miscospeakers.com/hs-fs/hubfs/IMG_0773.webp?quality=80&width=640&height=360&name=IMG_0773.webp)](https://blog.miscospeakers.com/laser-scanning-in-loudspeaker-production) ### [How Laser-Scanning Vibrometers are Used in Loudspeaker Production](https://blog.miscospeakers.com/laser-scanning-in-loudspeaker-production) A lot of time and energy is required when designing a loudspeaker. The manufacturer must ensure the... [Explore More on Speaker Materials](https://blog.miscospeakers.com/laser-scanning-in-loudspeaker-production) [![How to Get the Best OEM Audio Solutions - MISCO Speakers](https://blog.miscospeakers.com/hs-fs/hubfs/IMG_0696-Edit-3.webp?quality=80&width=640&height=360&name=IMG_0696-Edit-3.webp)](https://blog.miscospeakers.com/oem-audio-solutions) ### [How to Get the Best OEM Audio Solutions - MISCO Speakers](https://blog.miscospeakers.com/oem-audio-solutions) Unique audio challenges demand specialized knowledge and expertise. Loudspeaker manufacturers with... [Explore More on Loudspeaker Design](https://blog.miscospeakers.com/oem-audio-solutions) [![Explaining the Loudspeaker Design Process](https://blog.miscospeakers.com/hs-fs/hubfs/CustomSolutionsHeader3.webp?quality=80&width=640&height=360&name=CustomSolutionsHeader3.webp)](https://blog.miscospeakers.com/loudspeaker-design-process-for-oem-audio-solutions) ### [Explaining the Loudspeaker Design Process](https://blog.miscospeakers.com/loudspeaker-design-process-for-oem-audio-solutions) Loudspeakers are foundational to industries ranging from entertainment and communications to... 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MISCO, Bold North Audio, Redline, Warkwyn and Oaktron are registered trademarks of MISCO/Minneapolis Speaker Company Inc. - [Sitemap](https://www.miscospeakers.com/sitemap) - [Terms of Use](https://www.miscospeakers.com/terms-use) - [Privacy Policy](https://www.miscospeakers.com/privacy-policy) - [Accessibility Policy](https://www.miscospeakers.com/accessibility-policy) - [California Proposition 65 Compliance](https://www.miscospeakers.com/california-proposition-65-compliance) - [Site Credits](https://www.windmillstrategy.com/) ```json { "@context" : "https://schema.org", "@type" : "BlogPosting", "author" : { "@type" : "Person", "name" : "MISCO Speakers", "url" : "https://blog.miscospeakers.com/author/misco-speakers" }, "dateModified" : "2025-02-13T18:00:00.593Z", "datePublished" : "2025-02-13T18:00:00.000Z", "headline" : "History of Speaker Testing and Today’s Best Practices", "image" : [ "https://blog.miscospeakers.com/hubfs/IMG_0770-Edit.webp" ], "mainEntityOfPage" : { "@id" : "https://blog.miscospeakers.com/history-of-speaker-testing-best-practices-today", "@type" : "WebPage" }, "publisher" : { "@type" : "Organization", "logo" : { "@type" : "ImageObject", "url" : "https://blog.miscospeakers.com/hubfs/MISCO%2075th%20anniversary%20logo.svg" }, "name" : "MISCO Speakers" } } ``` ```json { "@context" : "http://schema.org", "@type" : "VideoObject", "contentUrl" : "https://www.youtube.com/watch?v=nS4IWrYUWrQ", "description" : "There are a number of steps to the acoustical measurement and testing procedure and it's important to use top-of-the-line equipment, technology, and engineering for every step of testing audio speakers. Such as, the Klippel Near Field Scanner, which generates a full-sphere three-dimensional data set (versus the commonly used half-sphere). This is incredibly important data, especially to our end-users and to our customers who want to know how their system, with our transducer in it, is going to react within its home environment.", "embedUrl" : "https://www.youtube.com/embed/nS4IWrYUWrQ", "name" : "What is the Acoustical Measurement & Testing Procedure for Speakers?", "publisher" : { "@type" : "Organization", "logo" : { "@type" : "ImageObject", "url" : "https://blog.miscospeakers.com/hubfs/MISCO%2075th%20anniversary%20logo.svg" }, "name" : "MISCO" }, "thumbnailUrl" : "https://i.ytimg.com/vi/nS4IWrYUWrQ/hqdefault.jpg", "uploadDate" : "2021-08-16T00:00:00-06:00" } ``` ```json { "@context" : "http://schema.org", "@type" : "VideoObject", "contentUrl" : "https://www.youtube.com/watch?v=xVNCdUiBkzs", "description" : "Laser scanning is important because it shows the vibrational behavior of speakers and enclosures to determine if it's matching the predicted behavior. This helps prevent issues during production and ensures a consistent sound for customers. Laser scanning allows for the ability to closely examine what a transducer does by reconstructing a frequency sweep into a 3D model at every frequency in order to understand the actual output of the system.", "embedUrl" : "https://www.youtube.com/embed/xVNCdUiBkzs", "name" : "What is Laser Scanning and Why is it Important for Speaker Testing?", "publisher" : { "@type" : "Organization", "logo" : { "@type" : "ImageObject", "url" : "https://blog.miscospeakers.com/hubfs/MISCO%2075th%20anniversary%20logo.svg" }, "name" : "MISCO" }, "thumbnailUrl" : "https://i.ytimg.com/vi/xVNCdUiBkzs/hqdefault.jpg", "uploadDate" : "2021-10-19T00:00:00-06:00" } ```