Bogen ANS501 Leaflet

• Consists of an ANS501 control unit, an ANS500M

microphone module, and a power supply

• Balanced input and output
• Unbalanced input and output
• Unbalanced stereo AUX inputs (summed mono)
• AUX inputs bypass gain control feature
• Remote defeat connections (to disable level boost)
• Automatically adjusts level of page announcements
• Run/Set mode switch
• ANS501 can be wired in between preamp and

power amp or to amplifier insert jacks

• Maximum boost; activity threshold; relative gain;

AUX input level; ramp speed; and ambient MIC
input threshold controls

• Supports up to four microphones wired in parallel
• Microphone wire run can be up to 2,000 feet with

no appreciable loss of signal

• Microphone module includes an adjustable mount-

ing bracket for precise positioning

• Powered by a 12V wall-mounted power supply

that operates from 120V AC

Specifications subject to change without notice.
© 2004 Bogen Communications, Inc.
Part No. 54-8022-01A  Printed in U.S.A. 0408

The Bogen Ambient Noise Sensor system is designed to monitor continuously changing ambient noise levels
and electronically adjust the level of a page announcement and/or background music so intelligibility is 
maintained. The system consists of the control module (Model ANS501), a microphone module (ANS500M),
and a power supply.
The system ensures that page announcements and music are audible even during periods of high noise levels
by continuously monitoring the ambient noise level through a microphone module located in the subject area
and adjusting the paging signal level into the system’s amplifier.