I know audioguru, I probably have the worst audio setup in the known universe. I have a 'hutch' for my computer that allows me to close it all up when I'm not using it (very very limited space) The speakers are at the back of a 19x28x21 inch deep 'box' with the side facing me obviously open. They're Creative cheapie speakers. They're nice enough, pretty compact but they're basically just a pair of 1.5 inch 'woofers' stacked vertically that are ported to increase the low end response a little, I don't have room for anything else right now. Even worse (and I wish I'd known this before I bought them) the headphone out jack is a passive bypass to the audio card, which BLOWS because the audio out on my PC isn't enough to drive headphones. It's been seriously bothering me lately, I can hear the phase shift from the reflections just moving my head a few inches, and the headphone output makes my ears 'squint' Even worse is the speakers are on either side of my LCD monitor which is only 4 inches from the back of the hutch which acts as a secondary air column which the bass port on the speakers happens to empty into. So the audio is to say the least, not flat, and I doubt it's fixable.
It's the only thing I hate about being married =) When I lived alone I had a studio that was virtually acoustically perfect for the 5.1 system I had. The standard stereo output was even phase shifted slightly from the front/rear speakers to avoid peaky areas. Sadly I gave it to a friend in need (poor DJs are much more in need than me) and I wouldn't dream of asking for it back, I should have just put it in storage.
My analog skills are lacking but I may just find a decent op amp from my junk box and make a headphone amp for my crappy open air headphones.