4. Adjust the input level so that the AP output is 0dB, the frequency response is as following
10Hz~22kHz +/-2dBu
5. Adjust the input level so that the AP output is 0dB, press the HI-pass button and the frequency
response is as following
6. Adjust the input level so that the AP output is 0dB, press the low pass button and the frequency
response is as following
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