It appears you try "low end equalization" with added distortion. Why? Are you lacking bass?
It sounds like you could eliminate the use of the EQ and add a subwoofer to fill in the richness of low end. It appears to sound just fine otherwise.
What front end piece should I upgrade?
I am requesting suggestions for the next upgrade of the front end of my system.
I currently have a Small Green Computer i5 running Quobuz and stored music files through a Sonore ultraRendu as a Roon endpoint, Audioquest Carbon USB cable into a PS Audio Directstream Junior. The DAC was purchased used about a year ago and although it provided better SQ than the DAC in my Oppo 105, I find the low end to be weak and with some slight high frequency sibilance / harshness. Sound stage, definition and musicality, otherwise and particularly in the midrange is significantly better than the Oppo. I had purchased the Junior with hopes of using it as the bridge Roon endpoint, but found the SQ far superior with the ultraRendu.
This front end is connected via balanced older Monster interconnects to a Simaudio Moon 600i integrated amp, (purchased used to replace a Rogue Sphinx) through Kimber cables ending with Sonus Faber Sonetto Vs. I have found the increased voltage of the 600i over the Sphinx to help the Sonettos open up even at low volumes.
Age early 70's, I primarily listen to Classic Rock, Classical Orchestra, Blues and "Folk-Jazz" (Norah Jones, Bonnie Raitt and dare I say, Diana Krall).
I am happy with the current level of music definition / resolution but find that I fatigue after an hour or so. I've done a bit of low-end equalization through Roon which helps there but find that in doing so, I hear a little bit of noise, distortion or harshness in voices that I do not hear when I remove the equalization from the path. I think I would prefer a little more warmth overall especially if it doesn't sacrifice resolution or definition.
In summary, I feel the front end of my system is the limitation and would like to better match the front end with the level / quality of the amplifier and speakers. Used equipment is fine. I do not live in an area where listening to systems is an option and most reviews have left me clueless, confused and don't appear to take into consideration the equipment I would like to keep in the system.
Any suggestions would be appreciated and I will respond to any questions and share my choice and experience after a decision is made. THANK YOU