TOA TS-921 Conference System Chairman Unit



The TS-921 is a Chairman unit of the Infrared Conference system. Since the system is cordless, it can be easily
installed and removed. The Chairman unit features a priority speech key which allows it to take precedence over
the TS-922 Delegate units when speaking. It can be operated on either the AD-0910 AC adapter or the BP-900A
lithium-ion battery. It is equipped with a remaining battery indicator. Two types of dedicated microphones are made
available for the TS-921 as optional products: the TS-923, TS-903 standard type and the TS-924, TS-904 long type.



Power Source 7.2 V DC (supplied from optional lithium-ion battery),
9 V DC (supplied from optional AC adapter)
Current Consumption Max. 390 mA
Infrared Emitter/Detector
Wavelength 870 nm (AM: Brightness modulation)
Modulation Method Frequency modulation
Carrier Frequency Transmission: Audio channel 1: 7.35 MHz
Audio channel 2: 8.10 MHz
Audio channel 3: 8.55 MHz
Audio channel 4: 9.15 MHz
Control channel: 6.45 MHz
Reception: Base language channel: 1.95 MHz
Translation language channel: 2.55 MHz
Covering Range 7 m (22.97 ft) (radius)
Input Microphone terminal: XLR-4-31 type
Output Monitor speaker: 8 Ω, 0.2 W
Headphone: ϕ3.5 mm mini Jack ( 3P: monaural) X 2
LED Indicator Speech indicator, Votinq status indicators 1 -3, Power indicator
Function Monitor volume control, Headphone volume control, Priority speech function,
Votinq function, Monitor selector switch (MAIN/SUB)
Battery Life Approx: 10 hours
Operatinq Temperature 0 °c to +40 °c (32 °F to 104 °F
Operatinq Humidity 90 %RH or less ( no condensation)
Finish Case: PC resin, black
Speaker net: black, mat finish, paint
Dimensions 205.7 (W) X 70.3 (H) X 164.2 (0) mm (8.1″ X 2.77″ X 6.46″)
Weiqht 525 g (1.16 lb)
Option Microphone: TS-923, TS-903, TS-924, TS-904 (Select either one.)
Lithium-ion battery: BP-900A
AC adapter: AD-0910