Need a preamp with tone controls!

Cambridge Audio Azur 840e has tone controls and direct bypass. 

This may not be an option, but here is what I’ve done. Since I purchased a new amp, minor things like noise really stands out ( zu omen def speakers). Before, I had a Pioneer EQ in my chain for night time listening ( minor low end boost...mainly used as a loudness switch). With the new amp, however, the EQ is a hissy noise machine. When I hit the EQ bypass switch, everything becomes quiet and pitch black. I took the EQ out of the chain altogether. The new amp has better bass than previous amp. Low and behold, the Bluesound Node and Roon both have tone controls within their apps under settings. Plus, the node has an analog in, so I plugged my oppo into that. The sound is really good and I can switch on and off as needed. If you do mostly hi Rez, streaming or Roon, there is an option within their apps.

Ditto the Acrosound and Luxman as preamps you should audition.  Alternative: Van Alstine custom modifications of Dyna PAS-3's.

Emotiva XSP-1 pre amp. Has what your looking for.