TOA Canada - When would I use 70V speakers over 8 ohm speakers?
  • 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,

When would I use 70V speakers over 8 ohm speakers?


Dear Greg, 

70V systems are typically used for installations that require large amounts of speakers to be installed. The 70V transformer on each speaker allows you to have multiple lines of speakers connected to a single amplifier without the need to worry about impedance issues as you would get with an 8 ohm system.

So generally, we use 70V distributed systems when we have a large scale venue such as a shopping mall that requires coverage throughout the facility. We would install an 8 ohm system where high end performance is required, in venues such as a churches or amphitheaters, where we have greater control over speaker runs and amplifier distribution.

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