All items tagged with voice coil (54)

Test Bench - BMS 18S450 18” Pro Sound Subwoofer

October 21, 2015 by Vance Dickason

Test Bench - BMS 18S450 18” Pro Sound Subwoofer

Voice Coil characterizes an 18” pro sound subwoofer from BMS Speakers, a noted German pro sound company. The BMS 18S450 is high power handling woofer rated at 1,200 WRMS. It weighs a moderate (for an 18”) 32 lb. Features for the 18S450 are rather substantial and include a proprietary eight-spoke cast-aluminum frame. This article was originally published in Voice Coil August 2104.

Headphone Testing (Part 2): Digital Headphones (USB & Bluetooth) and Noise-Canceling Headphones

July 22, 2015 by Brian Fallon

Headphone Testing (Part 2): Digital Headphones (USB & Bluetooth) and Noise-Canceling Headphones

Headphones with built-in electronics, such as digital headphones (including Bluetooth and USB), and noise-canceling headphones are harder to test because the electronics and transducers need to be tested together as a complete system. This Part 2 article discusses those tests. Article originally published in Voice Coil April 2012.

Headphone Testing (Part 1): The Basics

July 15, 2015 by Steve Temme

Headphone Testing (Part 1): The Basics

In this article, Steve Temme discusses the issues that are common to testing all types of headphones. As more and more loudspeaker engineers find themselves employed in the fast-growing headphone market, it is important that the unique challenges of testing headphone packages are fully understood.

Measurement and Perception of Regular Loudspeaker Distortion

June 3, 2015 by Wolfgang Klippel and Robert Werner

Measurement and Perception of Regular Loudspeaker Distortion

This article discusses the physical causes of regular loudspeaker distortions, their modeling by using lumped and distributed parameters, the objective assessment using modern measurement techniques, and the perception by the human ear. Article originally published in Voice Coil, May 2011

Driver Selection for Multi-Way Speakers

May 21, 2015 by Richard Honeycutt

Driver Selection for Multi-Way Speakers

Speakers evolved from a single sound source to having separate low-frequency and high-frequency drivers, each optimized for its own frequency range, to multi-way designs, with additional low-mid, high-mid and even super-high frequency drivers. Dr. Richard Honeycutt explains how to optimally choose these drivers. This article was originally published in Voice Coil, January 2012.

New Drivers from Eighteen Sound at Prolight+Sound 2015

May 4, 2015 by Joao Martins

New Drivers from Eighteen Sound at Prolight+Sound 2015

The Reggio Emilia loudspeaker specialist was in full force at the 2015 Prolight+Sound show in Frankfurt with an impressive display of new products in its catalogue. New for this year, the 8CX650 and 10CX650 coaxial loudspeakers, announced earlier in the year, are now shipping. But there’s also the ND4015Ti2 compression driver, the XG10 line source waveguide and much more.

A Look at Voice Coil Collars

April 21, 2015 by Mike Klasco

A Look at Voice Coil Collars

There are many subtle ways a speaker designer can use the collar to “tune” the speaker-design for optimum response, added strength, increased thermal tolerance, better assembly fit, and more. Many materials are available for use as a collar but a careful understanding of the physical properties of these materials is required for optimum selection. Originally published by Voice Coil, May 2012.

Loudspeaker Sensitivity: What’s a Watt, Anyway?

April 13, 2015 by Charlie Hughes

Loudspeaker Sensitivity: What’s a Watt, Anyway?

The specification of a loudspeaker’s sensitivity is probably one of the most common, yet perhaps one of the most misunderstood. In the past, and still today, it is common to see the magnitude response of a loudspeaker system reduced to a single number as a sensitivity rating. Article originally published by Voice Coil, April 2010.

Understanding Horn Directivity Control

April 7, 2015 by Charlie Hughes

Understanding Horn Directivity Control

Horns are often used in loudspeaker systems for a variety of reasons. One may be to provide increased acoustical loading to the driver attached to the horn. This helps to increase the sensitivity/efficiency. Another may be to provide some control over the radiation pattern of the driver attached to the horn. Article originally published by Voice Coil, November 2010.

Measurement Microphones: An Interview with Steve Temme

March 31, 2015 by Mike Klasco

Measurement Microphones: An Interview with Steve Temme

Mike Klasco interviewed Steve Temme, President of Listen, and asked about the important features and how to get the best performance of test and measurement microphones. He also learned about Listen’s recently released measurement microphone power supply. Originally published by Voice Coil, November 2013.

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