Charlie Hughes Author Profile


Charlie Hughes
Charlie Hughes
 
Charlie Hughes has worked at Peavey Electronics and Altec Lansing, and currently heads up Excelsior Audio Design & Services, a consultation, design and measurement services company based near Charlotte, NC. As a loudspeaker design engineer, he's devised more than 60 products and has been issued five patents, and he's also helped to develop and implement a sophisticated multi-axis rotation mechanism to aid in the measurement of loudspeaker directivity. He’s also a member of the AES, ASA, CEA and NSCA.

Latest Posts by Charlie

Square Waves And DC Content: Deconstructing Complex Waveforms

 Illustrating the harmonic structure (content and phase relationship) of a signal Read More

What’s The Response? Optimizing Loudspeaker Directivity Through The Crossover Region

 I’ve designed a lot of crossovers for loudspeakers during the last 30 years, and I’m sure that many of you have also designed them. Even… Read More

Accurate Above All: Executing Measurements For Loudspeaker Modeling Files

 Loudspeaker modeling files are most often used with acoustical modeling programs such as (AFMG) EASE, Focus, CATT-Acoustic, and others to help determine how well the… Read More

Phase Response & Receive Delay

 When measuring loudspeaker systems, the question of phase response often arises. I thought it might be informative to review setting the receive delay within a… Read More

Understanding Required Amplifier Size For Loudspeakers

 In a previous article (“Loudspeaker Sensitivity”), I examined the topic of loudspeaker sensitivity and how it may or may not relate… Read More

Loudspeaker Sensitivity: What’s A Watt Anyway?

 Shedding some light on the sensitivity specification and how it may translate to the real world performance of a loudspeaker system Read More

Aligning A Subwoofer With Full-Range Loudspeakers

 The process should typically entail three primary items Read More

Using All-Pass Filters To Improve Directivity & Magnitude Response

 Demystifying an overlooked tool that can be used to yield a more linear phase response Read More

Protecting Loudspeakers: Using Limiters To Enhance LF While Keeping Things Under Control

 Most loudspeaker systems have a limited excursion capability. The voice coil and cone assembly can travel only so far Read More

Getting The Most Out Of Impedance Measurement Testing

 Measuring impedance at typical application drive level and illustrating some possible uses will be of benefit Read More

Cause & Effect: Matching DSP With Loudspeakers

 A simple procedure for matching the output of a DSP to a target transfer function Read More

Cause & Effect: Matching DSP With Loudspeakers

 There’s a lot of cause and effect that sometimes gets overlooked, resulting in less than optimum performance... Read More

Loudspeaker Measurement: An Overview Of EASERA SysTune

 An inside look at some of the more common functions and uses for this program Read More