1- 2 x 20 Watt @ 4 0hm as the default amplifier output
2- Bridge connection function. Users can switch the PA20 to be 1 x 40 Watt @ 8 0hm by bridge connection
3- Two stereo audio inputs, switchable by panel button, IR remote and RS232
4- Volume / Bass / Treble controllable by panel buttons IR remote and RS232
5- MIC port can support balanced/unbalanced signals and suppresses external noise effectively. Line audio output via 3.5mm jack, with controllable volume
6- Dual-mono up the stereo audio to two times mono audio. MIC mixer function
7- The microphone will be mixed into the line audio output, and be controlled separately
8- MIC input supports 48V phantom power, dynamic MIC, and Wireless MIC
9- Auto noise gate. Keeps detecting the audio and MIC input, and will mute the output when there is no input
10- Ultra-low inrush current, no need for power sequencing, and this allows multiple iSound PA20 to be powered on simultaneously without overloading power circuits
11- Convection cooled, a fan is not needed
12- Anti-static case design: providing good protection for long-term and stable performance




Model iSound PA20
Name Dual 20W Audio Amplifier
Audio Input
Input (2) Stereo Audios, (1) MIC
Input Connector (2) RCA, (1) 3.5mm Jack,
(1) Pluggable Terminal Block (3P, 3.81mm)
Audio Output
Output (1) Amplifier, (1) Stereo Audio
Output Connector (1) 3.5mm Jack,
(1) Pluggable Terminal Block (4P, 5.08mm)
Audio Performance
Input Impedance >10kΩ
Output Impedance 50Ω Analog Output; 4/8Ω Speaker Output
Maximum Rated Power Output 2×20 watts (4 Ohms)
Frequency Response 20Hz ~ 20kHz
Common Mode Rejection Ratio (CMRR) >70dB@20Hz~20kHz
Signal to Noise Ratio (SNR) 80dB (Max)
Total Harmonic Distortion + Noise (THD+N) 1% at 1kHz; 0.3% at 20kHz at Nominal Level
Power Supply Input Voltage 100-240v AC at 50/60 Hz
Power Supply 24V DC at 2.71A
Maximum Power Consumption 45 watts
Operation Temperature 0℃ ~ +40℃
Storage Temperature -10℃ ~ +60℃
Storage Humidity 10%-90%
Dimensions (W*H*D) 123mm x40mm x87mm
Net Weight 720g


  • iSound PA20 Datasheet V1.0.pdf

    0.28M 15-07-2022
  • INFOBIT iSound PA20 User Manual V2.0.pdf

    1.74M 22-01-2024

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