Public address system · Fire broadcast amplifier
GB9221Fire broadcast amplifier
Key features
- GB9221 series fire alarm broadcast amplifiers are an extension device for emergency broadcast at fire or other accident scenes.In the field of fire broadcast, GB9221 must be used with the GB9242(Fire Broadcasting Host)to complete the fire broadcast. Background music broadcast can be directly played by external input source signals (such as CD/MP3 player, tuner, etc.) when there’s no accident event.
GB9221 series fire alarm broadcast amplifiers are an extension device for emergency broadcast at fire or other accident scenes.In the field of fire broadcast, GB9221 must be used with the GB9242(Fire Broadcasting Host)to complete the fire broadcast. Background music broadcast can be directly played by external input source signals (such as CD/MP3 player, tuner, etc.) when there’s no accident event.
The display of GB9221 series fire alarm broadcast amplifiers is built-in LED indicator lights.These built-in LED indicator lights can indicate various operating conditions and fault conditions.All the functions can be set up with light touch buttons.
GB9221 series fire alarm broadcast amplifiers only contain the power amplification section of the GB9242(Fire Broadcasting Host). The output power could be 150W/300W/500W.
GB9221 series fire alarm broadcast amplifiers assemble high quality power transformers internally.The static power consumption is low and the overload capability is high.GB9221 series have overload and over-temperature protection circuit, buzzer alarm when a fault occurs.
Technical Parameters:
| Power supply | AC220V(+10%,-15%,50Hz) |
| Line input sensitivity | 300mV ～775mV（line1、line2） |
| Line output level | 500mV ± 100mV |
| Effective frequency range for distortion limitation | 80Hz ～ 8kHz |
| Total harmonic distortion | < 5% |
| SNR | > 70dB |
| Monitor power | 3W |
| Fixed output voltage | 120V（fixed voltage mode） |
| Rated output power | 150W/300W/500W |
| Working environment | a）temperature 0℃-40℃ b）humidity <92％ |
| Insulation resistance | a）backup power input&the chassis ＞20MΩ（DC500V） b）AC input voltage&the chassis ＞50MΩ(DC500V) c）fixed output voltage&the chassis ＞50MΩ(DC500V) |
| Electrical strength | no breakdown between AC input&the chassis leakage current＜5mA（AC2000V |