Blue Sound Vault

Thinking about it further, if I’m you I’d start saving for an Innuos Zen Mk3 that’ll undoubtedly boost your sound quality significantly rather than spending $$$ trying to make the Vault sound better.  They can be had around $2k used, and if you sell the Vault it’d offset a good chunk of that.  If feasible that’s what I’d do.  Here’s an example available now…

https://www.usaudiomart.com/details/649994436-innuos-zen-mk3-1tb/

Thanks everyone for your suggestions.  Steve

Solution that was cheap and enhanced the sound tremendously.  A techie friend suggested turning the volume to max on the Vault.  This allows the preamp to control the volume.  What did I have to lose?  I was extremely surprised by the improvement.  Not perfect but very good.  Thanks again to all   Steve

A techie friend suggested turning the volume to max on the Vault. 

Why not just set it to "Output Level Fixed"?

I am not aware of the ability to set the output level fixed.  Can you walk me through it?  Thanks,  Steve