All items tagged with loudspeakers (181)

Measuring Loudspeaker SPL Response and Harmonic Distortion at Low Frequencies

November 8, 2023 by Reinhold Lutz

Measuring Loudspeaker SPL Response and Harmonic Distortion at Low Frequencies

This article discusses how to measure loudspeaker SPL response and harmonic distortion at low frequencies in a standard environment, full of reflections from acoustically hard boundaries (e.g., walls, floor, and ceiling), room resonances, and even ambient noise reducing the dynamic range and accuracy of the measurements. The method combines near-field measurements with two identical microphones. This article was originally published in audioXpress, October 2023.

Simulation Techniques: Loudspeaker Driver Displacement Decomposition

October 25, 2023 by René Christensen

Simulation Techniques: Loudspeaker Driver Displacement Decomposition

This article by René Christensen (BSEE, MSc, PhD), offers a valuable tutorial that discusses the unique possibilities of three-dimensional analysis of loudspeaker driver displacement, using Phase Decomposition and Axial-Symmetrical Decomposition techniques. The article demonstrates how a total displacement on a cone surface can be decomposed into different components directly in COMSOL Multiphysics, and how this can reveal some of the underlying mechanisms of the driver.

Voice Coil Patent Review: Two Key Resonado Patents

October 19, 2023 by James Croft

Voice Coil Patent Review: Two Key Resonado Patents

James Croft looks at two patents from Resonado Labs, the young speaker company that has been pursuing a new speaker topology — originally called Flat Core Speaker (FCS), and now rebranded as Res-Core — using a reconfigured speaker with a planar voice coil mounted perpendicularly to its flat diaphragm. This review covers two of the company's patents granted in 2022, titled "Speaker Comprising Split Gap Plate Structure," and "Flat Speaker Driven by a Single Permanent Magnet and One or More Voice Coils.".

TAD Labs Introduces TAD-GE1 3-Way High End Speakers

September 1, 2023 by Alfred Moody

TAD Labs Introduces TAD-GE1 3-Way High End Speakers

Technical Audio Devices Laboratories (TAD Labs) announced the TAD-GE1 (Grand Evolution One) speaker system as the newest addition to its Evolution Series of hifi audio components. Borrowing internal technology and design language from TAD’s top-of-the-line Reference TX Series as well as the distinguished wood-grain finish of the standmount CE1TX speakers, the new GE1 floorstanding speakers feature a coaxial driver with a magnesium diaphragm midrange and beryllium tweeter, and second generation multi-layered aramid composite woofers.

Patent Review: Radial Acoustic Speaker

August 30, 2023 by James Croft

Patent Review: Radial Acoustic Speaker

In this article, James Croft discusses a patent granted to Curtis Graber (Woodburn, IN) that describes a radial acoustic speaker assembly including a transducer and a plurality of segmented spiral horns acoustically coupled to the transducer, each with its acoustical path. This new patent by prolific audio inventor, Curtis Graber, uses a new multi-spiral waveguide structure driven by a single transducer and has clear advantages over prior art. This article was originally published in Voice Coil, May 2018.

Patent Review: Two Pioneer Patents. Same Speaker Invention

July 20, 2023 by James Croft

Patent Review: Two Pioneer Patents. Same Speaker Invention

This article reviews two patents titled simply "Speaker Device" from four Japanese inventors, on behalf of Pioneer Corp. of Japan. The original and expanded patent describes a flat speaker device capable of emitting loud reproduced sound, using a mechanical structure that converts a linear voice coil motion in one axis to an orthogonal mechanical diaphragm displacement. The system functions much like a scissor-jack you would use to raise your automobile to change a tire. The linear motion of the threaded rod coverts the axial force to a 90° lift movement.

July 14, 2023 by Joao Martins

RCF Introduces TT+ Audio as a New Independent Brand

RCF introduced TT+ Audio, a new premium brand in the group, founded on the company's decades of experience designing high-performance sound reinforcement products that provide integrated, reliable solutions for professionals seeking the highest quality in sound reinforcement. The brand's all-encompassing approach to product design, engineering, and tour-tested reliability, is intended to be perceived as a premium solution for touring professionals and high-quality permanent installations.

Patent Review: An Advanced Loudspeaker System

July 4, 2023 by James Croft

Patent Review: An Advanced Loudspeaker System

This article examines a notable patent from VUE Audiotechnik, describing a loudspeaker system with one driver providing a direct radiating output from the front, and a second driver on a ported side chamber, sharing a ported common chamber, where at least one port of the ported common chamber exits the front of the loudspeaker system. As Croft notes, this is an innovative advanced system - that was patent-pending at the time - and provides a unique combination of technology, offering real-world advantages. The patent was granted in 2021.

Bowers & Wilkins 800 Series Signature Loudspeakers Are Affordable Luxury

June 28, 2023 by Joao Martins

Bowers & Wilkins 800 Series Signature Loudspeakers Are Affordable Luxury

Bowers & Wilkins made a familiar announcement. The company found another way to refine the formula for something that doesn't necessarily needs to change, but needs to be constantly revived to keep the brand and product awareness alive. This time, B&W announced the new 801 D4 Signature and the 805 D4 Signature speakers, further refining and advancing a very successful design into the Ultimate affordable luxury.

June 5, 2023 by audioXpress Staff

New Premium Audio Brand Theory Professional Debuts at InfoComm 2023

Theory Professional is making its official debut into the commercial audio market at InfoComm 2023 in Orlando, Florida. Exhibiting in booth 4989 and Audio Demo Room W223A, June 13 – 16, 2023, Theory Professional (Theory) is the new brand created by the Orange County-based company, already established with the Theory Audio Design brand of audio products for the home and residential installation. With a hyper-focus on performance and design, Theory Professional aims to become a go-to premium solution for the commercial audio market.

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