The best way to get perfect sound quality is first you need to set the volume to 1/3 on the wiim dac when connected to the tv via the hdmi port and have turned on sync. Next you will have to turn off room fit. And now you will proceed to fine-tune the EQ in a way that I think is very effective for outdated home audio systems, I adjust the high frequency range first, here I have 8 khz and 16 khz, I adjust it so that the treble of the speaker crackles. But remember one thing is that when adjusting the high frequency, you should reduce all mid-range frequencies to -12 dB. The purpose is to highlight the treble. For the wiim dac, if you adjust the frequency ranges that are too different, the system will be distorted and mixed. To get clear sound, I advise you not to let at least 3 frequency ranges near each other increase or decrease evenly. There must be a gain column and a high column and a low column so that the sound is not distorted and distorted. why do i leave the volume level one third here i leave 35 volume. in my opinion with such volume level the signal from tv will go into dac will have clearer waveform helping wiim to decode more accurately more gradually if you adjust the volume level like that you will easily get purer bass and treble than volume level only a few volumes like 5, 6 or 7... after adjusting high sound i will adjust to bass in the first column and second column, third and finally mid range. after i listen it feels quite ok with my ears the final step needs to be completed a little more with room fit. I run room fit with a frequency from 50 Hz to 16 khz, the main purpose is to let room fit fix the remaining parts of the sound that are not yet perfect. Finally, my speakers still lack a little treble. I raised column number 10 in room fit to match the sound field that I adjusted the EQ at the beginning. and so i have done what for a long time i thought dac wiim ultra only listens normally not worthy of pure dac. share with you.
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