Starting at $149 you can buy a Schiit Loki Mini+ four band equalizer which will allow you to experiment with different settings to your heart's content. For $300, their Lokius expands this to a six band EQ. (They also have a still fancier unit for $1,500....)
I've always found it interesting that many audiophiles are so willing to adjust the tone quality of their system with wires, amps or preamps that offer only one change in the frequency balance of their system but won't consider a device that lets them quickly adjust the tone as needed by different recordings.
Just a thought....