How do I warm up my system?

it's interesting. nobody has endorsed an equalizer. why ?

i have heard equalization used at ces to eliminate balances in frequency response.

selecting a slope starting at 3k and looking at each octave thereafter up to 24k, might ameliorate the situation.

it's not a panacea but it might be a palliative.

your electronics may be spectrally unbalanced and unforgiving of poorly recorded source material.

i ahd the dehavilland in my system and sent it back. i did not perceive a tube like sound.

the nuforce is solid state and also not very kind in the treble range.

you could try anti resonant devices under components designed to "soften", such as furniture foam, sorbothane, sound fusion sound boosters.

you could try changing ac c9ords for your amp and pre. you could try line conditioners and other filter devices.

but, unfortunately, short of changing your electronics (i'm not familiar with your speaker), only an equalizer will create the results you desire. try 'em you may like one of them.