1. System main unit can be connected with 168 speaking units at most. When multiplied main unit is connected through the multiplying interfaces (many multiplied units “hand-by-hand” type), 5376 speaking units at most are available without interference between each other.

2. “Hand-by-hand” connection for installation and maintenance convenience

3. Sound frequency input interface for connection with external frequency signals like background music or phone conference system, etc.

4. Several groups of output passages. It can be connected with PA for magnified output of speech or be connected with record system or phone conference system, etc.

5. Speaker NO. limit: limit Max. speaking units. If users want to open other speaking units after reaching rated value, they must close the open one. Speaking unit number can be adjusted in 1/2/4/6 and the chair unit is not limited

6. First-in first-out function (FIFO): If the current speaker number has reached the Max. value, the late unit will replace the earliest one automatically. Speaking unit number can be adjusted in 1/2/4/6 and the chair unit is not limited.

7. Internal equalizer can adjust voice tone of output frequency signals in order to adapt to different auditory requirements.

8. Internal frequency shifter can effectively stop squeal.

9. Central control system can administrate conference system as a replacement of administration software. For example, conference mode choice, speaker number set-up, etc.

10. With image pick-up tracking system to realize automatic video tracking function

11. Voting and data-managing function

12. With telephone coupler for remote phone conference

13. The machine shell is made of metal. The connection between the earthing and all wires and machine shell are reinforced to ensure electrostatic prevention capacity of 8000V

·Electrical power: Switch power 100-240V；

·Static power consumption: 10W；

·Max. power: 350W；

·Output power: ≤110W/24V；

·Audio frequency output impedance: 100Ω；

·Audio frequency output type: Unbalanced；

·Loudspeaker input impendence: 2kΩ；

·Loudspeaker input level: -60dB；

·Loudspeaker input type: Unbalanced；

·Frequency response: 60-12kHz；

·S/N: >80dB；

·Harmonic wave distortion: <0.5%；

·Overloading wave distortion: <1%；

·Crossover decay (1KHz): >50dB；

·Weight: 6.5KG；

·Size (L x W x H): 430 x 275 x 90 (mm)；