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Audio Review: TOA TS-770 Series Conference System

Jun 1, 2008 12:00 PM, By John McJunkin

Self-explanatory system makes conferencing easy.

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The TS-773 and TS-774 are the two microphones available for the system, and either can be accommodated by either the chairperson or delegate units. Both are cardioid condenser mics with a frequency response of 100Hz to 13kHz. The 100Hz roll-off is a nice mechanism for taming plosives. The TS-773 is 14.5in. in length, and the TS-774 is just short of 20.5in., and having the option for either is nice for contractors who contend with varying table heights. Both have a highly visible red-ring speech-indicator LED below the windscreen.

The TS-775 remote delegate interface unit facilitates the inclusion of external I/O in the form of telephony or IP-oriented communication. Its front panel features a standard modular phone jack, a handset selector switch, mini-jack mic input, mini-jack speaker output, knobs to control input and output levels, a speech-indicator LED, an auto/manual selector switch, and a talk key. The rear panel simply has a line-connection cord, a line-connection terminal for daisy-chaining, and a control output like the chairperson and delegate units. If I may plant a bug in the collective ear of TOA, a USB interface would be nice here to facilitate even easier IP integration.

Considering the uncomplicated and largely self-explanatory nature of the system's connections and controls, I was able to very easily make connections and get the system up and running in just a few minutes. And it became very clear that the inclusion of more (even many more) delegate or even chairperson units would not complicate matters much at all. The daisy-chain format makes setup incredibly easy. Telephone connection simply required the connection of a standard phone cord to the unit's modular phone jack. Connection to my laptop computer was also easy, with mini-jack connections both ways. This facilitated VoIP communications, which is rapidly catching on around the business world — particularly with Skype, which is recommended by TOA. Conference operations are simple, with delegates simply pressing their talk buttons to chime in, and granting the chairperson the ability to lock out all other delegates with the priority button. I was pleased with the audio quality of the microphones and the loudspeakers built into the delegate and chairperson units. One of TOA's goals was to accomplish good-quality audio, and the company has done so indeed. Extension cords to further separate units from each other are available, a welcome fact for contractors.

My bottom-line assessment is that the TS-770 Series Conference System is an affordable, high-quality solution that is exceedingly simple to use. If speed and quality are key requirements, do yourself the favor of taking a look at this system.

John McJunkin is the principal of Avalon Podcasting in Chandler, Ariz. He has consulted in the development of studios and installations, and he provides high-quality podcast-production services.


  • Company: TOA Electronics
  • Product: TS-770 Series Conference System
  • Pros: Affordable, simple setup and operation, good quality.
  • Cons: No USB interface in the TS-775.
  • Applications: Government, corporate, educational, hotel conferencing.
  • Price: TS-770: $1,208; TS-771: $494; TS-772: $446; TS-773: $134; TS-774: $208; TS-775: $648


TS-770 central unit

  • Mic Input: -60dB, 600Ω unbalanced phone jack
  • Auxiliary Input: -20dB, 10kΩ unbalanced phone jack
  • Recording Output: -20dB, 10kΩ unbalanced phone jack, two RCA jacks
  • Equalizer Insertion Terminals: -20dB, 10kΩ RCA jacks, input and output
  • Expansion I/O Terminals: -20dB, 10kΩ RCA jacks, input and output
  • Control: ≥10kΩ RCA jacks (two)

TS-771 & TS-772 chairperson & delegate units

  • Audio Output: 32Ω headphone, -20dB, 10kΩ unbalanced mini-jack
  • Contact Output: 24VDC, max 50mA (open collector output)

TS-773 & TS-774 short & long mics

  • Type: Electret condenser
  • Directivity: Unidirectional
  • Rated Impedance: 1.8kΩ
  • Rated Sensitivity: -37dB (1kHz, 0dB = 1V/Pa)

TS-775 remote delegate interface

  • Input: -60dB, 200Ω balanced mini phone jack
  • Output: -60dB, 22Ω balanced mini phone jack

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