So yeah... I'm suddenly interested in adjusting my iTunes equalizer to see if I can make my music sound 'better'. Not that it sounds horrible right now mind you, I just want to see if I can make it any better than it is right now. Problem is, I have absolutely no idea how to even start to do that, but I think someone here might be able to tell me. ... I hope.

I'm also interested in adjusting? tuning? I haven't got any idea what the term/word would be, my speakers. I don't know... maybe I'm just looking for some sound clip and set of instructions that goes, "Your treble should sound like this, play such and such clip and adjust your treble until it sounds like that" and so forth. Something that probably doesn't exist at all, because "good" sound isn't exactly the same for everyone.

Am I making any sense at all?

It's a matter of taste. Basically, if you don't touch the equalizer at all, you're listening to the recording like the artist/producer 'meant' it to sound. However, if your equipment for example doesn't have a lot of bass power, you could compensate for that by turning up the low frequencies. But you can also adjust it simply how you think it sounds good. Some people like a lot of treble, so they turn up the high frequencies, for example.

It's simple really, Usually an equalizer has 5 bands, a low, a mid low, a mid, a mid-high and a high. For more bass, you turn up the lower frequencies, or turn them down for less. mid and mid high is really determining for the overall volume, because these frequencies are the loudest to the human ear. here are the vocals and guitars. The high frequencies are for cymbals, high-pitched electronic sounds, etc.

If you want to be real audiophile-like you actually should never turn UP anything. Only tone down what you want to hear less. So, if you want more bass, Leave the bass at the middle line and lower the mid and high fequencies. That way you're not distorting the signal. All you need to do is turn the volume up, after that. It'll sound better than when you turn frequencies up. (over the 'middle line')

When you're having a party and the house is full of people, the best way set the equalizer is lots of bass, enough treble, and considerably less mid. That way you can hear the music in the background, it'll be loud enough, you'll feel the bass, but you won't have to shout over the music to be heard, because the mid isn't making you deaf, and not interfering with the voices.