TOA Canada - Is there a detailed drawing of the cable for the AM-1?
  • TOA conference systems, conference, TS series, 820, 920, audio conference, boardroom, council chambers, government municipalities, townships
  • TOA Canada, products, N-SP80, android, apple, software, app, application, security, intercom, access control, SIP, SIP intercom, doorstation
  • TOA Canada, products, Microphone, digital microphone, S2.4, wireless, house of worship, school, education, conference, boardroom, presentation, wireless system
  • TOA Canada, products, voice evacuation, security, intercom
  • School, education, voicelift, classroom audio, IR-800, TOA, TOA canada, sound dispersion, classroom speaker, frontrow, techer mic, juno
  • SIP horn, IP horn, Network Horn Speaker, security speakers, Horn speaker, Onvif

Dear Dr. Sound,

I was looking at the manual for the AM-1 directional array mic entitled "AM-1 Setup Guide for the Polycom® Video Conferencing Systems" and I noticed that the balanced output of the control module is connected to the unbalanced inputs of the Polycom® codecs. There is no detail drawing of the cable, only the XLR end. 


Dear Terry, 

Since you are taking a balanced output and connecting it to a un-balanced input you would need to modify or purchase a pre-made cable. Basically, you need to create a jumper wire from the XLR output to the RCA ends that connects pin 3 (COLD) and pin 1 (GROUND) in order get the signal to your input. Essentially you will have a cable like this:



Your Dr. Sound


Ask Dr. Sound


Have a question you'd like Dr. Sound to answer? Send it to Dr. Sound and he will answer it right away. It may even appear in next month's newsletter and you will receive a free T-shirt for winning the Tech Tip of the month submission!


Contact Dr. Sound or our Technical Support Team for more information or with questions. 1-800-263-7639 x 320