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General| Channels | 4 |
|---|---|
| Frequency Response | 20Hz - 20kHz |
| Input Sensitivity | 200mV - 6V |
| Crossover Frequency | 50Hz - 500Hz |
| Bass Boost | 0dB - 12dB |
| Bass Boost Frequency | 45Hz |
| Signal-to-Noise Ratio | 90dB |
| Crossover Type | HP/LP |
Control for adjusting the volume of Channel 1.
Control for adjusting the volume of Channel 2.
Control for adjusting the volume of Channel 3.
Control for adjusting the volume of Channel 4.
Control for adjusting the volume of Channel 5.
Adjusts the bass frequency response of the amplifier.
Adjusts the treble frequency response of the amplifier.
Control for adjusting the overall output volume.
Switch to turn the amplifier on or off.
LED indicating the power status of the amplifier.
LEDs showing the output audio signal level.
Buttons for activating chime or emergency functions.
Power input socket and protective fuse.
Connections for chassis grounding and 24V DC power.
Terminals for connecting loudspeakers.
RCA outputs for Aux and Tape signals.
Various RCA and XLR inputs for microphones and auxiliary sources.
Switches for selecting MIC/Aux or voltage inputs.
Terminals for external control of chime and emergency functions.
Information on connecting the amplifier to AC power.
Instructions for connecting a 24V DC battery.
Details the pinout and configuration for balanced XLR microphone inputs.
Alerts users to high voltage hazards and the need for qualified service.
Warns against exposing the unit to moisture, liquids, or improper environments.
Guidance on how to unpack the QSM-624ET amplifier.
Recommendations for suitable operating environments for the amplifier.
A comprehensive list of safety guidelines for using the amplifier.
The primary switch for turning the amplifier on and off.
Adjusts the input volume for each of the 5 channels.
Adjusts the bass and treble frequencies of the audio output.
Sets the overall output volume level of the amplifier.
Provides a pre-announcement chime for attention.
Generates an electronic bell sound upon activation.
Activates an emergency alert tone according to Australian Standard.
Activates an emergency evacuation tone for orderly building evacuation.
Visual indicators showing the amplifier's operating audio level.
Details type, model, mains voltage, battery voltage, and output power.
Information on speaker outputs, tape/aux outputs, and various input types.
Specifies frequency response ranges and total harmonic distortion.
Details the signal-to-noise ratio for different input types.
Specifies the range and frequency for bass and treble tone controls.
Lists controls available on the front and rear panels.
Details chime controls, voltage selector, and priority functions.
Specifies AC/DC power consumption and phantom power output.
Details dimensions, weight, color, and mounting options.
Diagnoses and suggests solutions for lack of audio output.
Identifies causes and solutions for microphone squealing.
Addresses causes and solutions for audio distortion.
Advises on fuse replacement and the need for qualified personnel.
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