bright up "warm sound" speakers


Hi,
My system is too warm for my listening taste. The low to mid bass seemed to be muddle, and the high are not as detailed as I would like to hear. I would like suggestions on how to "brighten" it up a little and not breaking the bank. I mostly listem to acoustics music, opera, classical, blues,very little POP and some Jazz.
Here is my system:
Sonatina II
Musical Fidelity A3CR Amp
Proceed Pre preamp
Jolida CD100 (stock tubes)
Audioquest Midnight speakers cables
Audioquest Lapis interconnect
BL1 interconnects
Listening room is 14 X 18 ft

Someone had suggested to replace speaker cables. What do you all think? If you think what I have right now is the best it can sound, then I can live with it. But if there are improvements (not breaking the bank) to be made, then please fire away. Thanks in advance for your suggestions.
jeanluc07
Why dont yo try to install brighter tubes in your Jolida ????
Not too expensive and sure to be different.
As what brand of tube you should try, on this one I dont know.
But I have red somewhere that the golden dragon brand are almost always
been concidered on the bright side..
Post removed 
Thanks for all your responses. My listening room (8ft ceiling)is almost empty, with just a small Italian chair (and some toys for the little baby). It has no drapes so sound is bouncing all over the place. The speakers are placed 2 ft from the rear wall and 2 ft from the side wall.

The first thing I will do is try new speaker placements. 3 ft from the walls???

Second, may be try some room treaments. What do you suggest? and where can I find them?

Third, probably try new tubes for the JD100. Which tubes are will give me the most highs and detail sound?

Last, I will try new IC for the source and new speaker cables . Any suggestions.

Boy, this hobby is expensive but fun.
What is your room made of? if it is alot of carpet and drywall with few windows it will hurt the accoustics and suck some of the life out of the sound.

i had this problem with my system in my finished basement, what i did was go to home depot, bought 3 big-ass mirrors. I put one on each side wall and one behind the system. Brightened it up nicely.

plus i can tend to my narcisissic side and give myself a long and loving inspection.
you might consider trying to borrow a different source altogether-a friends cd player, for instance. The warmth you are experiencing may be comming from some other influence in your system, so perhaps experimenting here would yield some insights-and its free!