SPL Graph Data: Let’s Get Back to a Level Playing Field

This excellent thought piece by loudspeaker industry veteran Tom James, addresses the often disregarded topic of speaker measurements and the corresponding variables of SPL Graph Data. In his short essay James explores the impact of ignoring or intentionally manipulating the rules established in the "Scales and Sizes for Plotting Frequency Characteristics and Polar Diagrams," defined in the IEC-602632 standard, originally from 1982 and updated in 2020.

In Voice Coil April 2024, Tom James reminds us about the importance of SPL Graph Data, and Mike Klasco revisits the fundamentals of speaker lead-out wire. As scheduled, there's an updated directory of Speaker Cable and Connector Vendors. James Croft explores a patent detailing a filter that may increase and extend the bass frequency response of a speaker. And for this month's Test Bench, Vance Dickason characterizes the Neotera Ultraflat UF 295 CBS 10" Subwoofer, followed by the SEAS W16NX005 5.25" Midbass Woofer with a metamodal TPCD diaphragm.

Lavoce Italiana announced the appointment of Tom James as the company's new Business Development Manager for The Americas. The appointment follows a period of significant expansion, including the release of multiple high-quality drivers to the company's already comprehensive transducer catalog. Tom’s practical experience includes over 30 years in positions conducting loudspeaker development, enabling Lavoce to reinforce its contacts with strategic OEM and distribution partners in the region.

MISCO announced that, as of January 1, Tom James has joined their engineering group to serve in the newly created role of Senior Engineer of Applications and Design. Tom James is well known and highly respected among speaker designers. Earning his BSEET with Audio Elective degree from Western Kentucky University in 1985, Tom’s practical experience includes over 30 years in positions conducting loudspeaker development.