Sega Genesis stereo output needs pre-amp

I think a good area to start with improving the sound of retro gaming gear is always the Chiptunes Scene.

https://chipmusic.org/forums/topic/12700/best-audio-mod-for-the-genesis/

Interestingly all Sega Megadrive / Genesis are not born equal:

you have reached little-scale's chiptech page

Depending on the model you have there this could be an option:

Crystal Clear Audio Mod

... and it looks like you have done this or something similar  RetroRGB - Genesis 1 Stereo Audio Mod  

Another Item to check would be this:

  https://www.dragonbox.de/Downloads/MegaDrive-Genesis-CCAM/CCAM-Mod-ENG.pdf

I saw a rough video on YouTube one time and decided to try it out. The person didnt install any plugs on his setup which would make it very difficult to remove the top of the shell, so i used some plugs from my RC repair stuff to make it neat and practical.

I was thinking of sticking a ferrite core on the RCA jack side of the AV plug. Don't know if that would be practical or not.

I'm not good at engineering stuff but it doesn't stop me from trying. I just thought there might be a way of boosting the audio signal without buying kits etc, and just use basic items like capacitors, transistor... I dunno what i was thinking, sometimes it's just silly nonsense. For example, on another model 1 i've been working on, i thought it might benefit the audio if i used a bass booster from a broken set of turtle beaches headset. The sound is real nice but i still need to turn the tv volume up twice as loud to hear it properly. I also needed to install a tiny fan to cool the voltage regulators because i tapped into the 5v on one of them. Again, I am no engineer, I just have a massive imagination.

I saw a rough video on YouTube one time and decided to try it out. The person didnt install any plugs on his setup which would make it very difficult to remove the top of the shell, so i used some plugs from my RC repair stuff to make it neat and practical.

I was thinking of sticking a ferrite core on the RCA jack side of the AV plug. Don't know if that would be practical or not.

I'm not good at engineering stuff but it doesn't stop me from trying. I just thought there might be a way of boosting the audio signal without buying kits etc, and just use basic items like capacitors, transistor... I dunno what i was thinking, sometimes it's just silly nonsense. For example, on another model 1 i've been working on, i thought it might benefit the audio if i used a bass booster from a broken set of turtle beaches headset. The sound is real nice but i still need to turn the tv volume up twice as loud to hear it properly. I also needed to install a tiny fan to cool the voltage regulators because i tapped into the 5v on one of them. Again, I am no engineer, I just have a massive imagination.