80W Pre-power amplifier for PA system

Main Features:

1.Standard case design: 1U black brushed aluminum panel, SPCC cold rolled case, suitable for cabinet or desktop installation
2.Amplifier type: Class D power amplifier circuit design, low loss with more than 90% amplification efficiency
3.Digital: higher digital circuit integration, stability and green energy saving further significantly improved
4.Small size: The use of highly integrated digital chip instead of the traditional transformer, smaller volume reduced to 1U panel, lighter weight.
5.Junction clarity: No traditional annular transformer produces high-frequency oscillation and common mode noise, and prevents the current noise brought by coupling, crosstalk and electromagnetic radiation. Meanwhile, the digital circuit has strong anti-interference.
6.Level indication: Provide level blind spot tuning dB value
7.Independent volume control: Each line and microphone has a separate volume control
8.Distortion detection: signal distortion detection, indicator light long on distortion
9.Input interface: 3 audio source input, including 1 standard line input interface, 1 standard microphone input interface, 1 emergency fire microphone input interface
10.Output port: 1 audio source output, which can be looped to the next power amplifier audio input port
11.Emergency fire input: automatic silent sound, with the highest priority, junction FET for priority conversion, to ensure that the signal in the silent sound process without distortion
12.Indicator: 3 level indicator, 1 protection indicator, 1 distortion indicator, 1 power indicator
13.Port type: 70V, 100V constant voltage output, 4-16Ω constant resistance output
14.Work area protection: line safety work area protection, to ensure the output load in short circuit, overload and other bad environment work safel
15.Temperature protection: When the machine temperature is too high, it can automatically enter the protection state
16.Negative feedback protection: It can effectively protect the power amplifier when the peak signal is distorted, impinged, or the line voltage is seriously overvoltage
17.High frequency rendering circuit: render and tune the high frequency caused by the interline transformer. The high frequency is slim and bright
18.Cutting circuit: high octave bass cutting circuit, in the case of no loss of sound quality to remove the safety risk of ultra-low frequency components, to ensure the safety of the booster system work
19.Power:80W,160W,240W,360W,460W