Source: PRO AV Magazine
Publication date: March 1, 2005
By Sam Berkow
Product: Lectrosonics TM400 digital hybrid wireless system
Price: $1,890 (MSRP)
Company website: www.lectrosonics.com
Plus: Convenient, compact, and durable transmitter and receiver package; frequency selectable RF; includes compandor-free audio path and phantom power for test microphones
Minus: Some signal degradation compared to a standard mic cable; questionable durability of external power supply connector
AT SIA Acoustics, we use measurement microphones in a number of applications: measuring loudspeakers both in our lab and on job sites, setting up sound systems, and measuring room acoustics issues such as reverberation and ambient noise conditions. There are several issues that present problems for using standard wireless systems in critical measurement applications such as increased self noise, distortion, and noise artifacts due to companding deviations of frequency and phase response and range. However, the Lectronsonics unit successfully addresses most of these issues for all but the most extremely demanding situations.
DesignThe TM400 system consists of a UH400TM transmitter and R400 receiver. The receiver chassis design is compact, functional, and durable. The complete package, along with a measurement microphone, notebook computer, miscellaneous cables, adapters, etc. easily fits in a backpack or briefcase-type kit.
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