Holes in the frequencies of my audio system: 220 hz and 520 hz too low.

[soundbunny]

I have a problem with the 220 hz and 520 hz frequencies in my car audio system (look only at the red line). The reason I measured the frequency response is that I felt the mids were empty and too distant, especially in male vocals like PoSt Malone and The Weeknd. After the music I raised the 500 HZ and 200 HZ but the new measurements always show those gaps.

https://imgur.com/Gife2wx

This is the calibration audio used:

Smartphone mic (S23 Ultra) + Spectroid Android App

Do you have some insights to fix this?

 

[DVDdoug]

Narrow-band errors, especially dips, can be "difficult". But narrow dips usually don't sound too bad.

After the music I raised the 500 HZ and 200 HZ...

What are you using for equalization?

Parametric equalization can make a more-narrow boost-band, but you have to be careful boosting because you can clip (distort) the digital signal or the analog. Most PEQ software has a "preamp" feature to bring-down the overall level, but then it might be too quiet.

To me, it looks like lowering the bass would help (because you have a bump it makes the mids & highs relatively stronger).

 

[Doodski]

I use the pre amp feature to a large degree due to my calibration of the PEQ. One can see it here.>

 

[soundbunny]

This is the eq system in my car (not my setup, just to show the kind of system I have).

I'm using a subwoofer too, that's because you see a big bump in the lows in the graphs.

Overall, in addition to the two shortcomings in the 220 and 520 frequencies, where is the problem in the mids that I hear? I can't find it by turning up the individual values on the EQ.