I can't recall seeing any provisions for adding an equalizer to the DK integrated amp. If I'm correct you would have to insert it between the source and the amp, but you have two sources....
If I'm wrong, get an equalizer and put it an a tape loop where it can be switched in and out as necessary.
However, reading into your post what I detect is that you are unhappy with the overall sound of your speaker/amp combo in general. If this is so it could be due to several reasons. Proper speaker set up is a big one. Neither your speakers nor your amp are particularily euphonic (warm) tonally speaking and could easily sound cold in combination. Proper set up and room treatments are essential.
Tube swapping referred to above might help also. Get some tubes reported to be warm in tone. FWIW the Siemans generally recommended are not, as a brand, known for being warm. Think something like Mullards.
And when all of that fails, think of getting a warmer toned amp. Everything that I have read about the DK so far doesn't suggest to me that it has an overly warm mid range, but then I'm a tube amp enthusiast so maybe my expectations are too different to judge.
If I'm wrong, get an equalizer and put it an a tape loop where it can be switched in and out as necessary.
However, reading into your post what I detect is that you are unhappy with the overall sound of your speaker/amp combo in general. If this is so it could be due to several reasons. Proper speaker set up is a big one. Neither your speakers nor your amp are particularily euphonic (warm) tonally speaking and could easily sound cold in combination. Proper set up and room treatments are essential.
Tube swapping referred to above might help also. Get some tubes reported to be warm in tone. FWIW the Siemans generally recommended are not, as a brand, known for being warm. Think something like Mullards.
And when all of that fails, think of getting a warmer toned amp. Everything that I have read about the DK so far doesn't suggest to me that it has an overly warm mid range, but then I'm a tube amp enthusiast so maybe my expectations are too different to judge.