[taiyeungjai]

I assume you don't have any amplifiers and are using just a headunit to drive your speakers (4 of them), If you have a sub then reply and I can help you tune that as well.

a] Try not to tune an EQ with MP3s.. (Use regular audio cds if possible).. Lower encoded bitrates and material with lots of transients will affect your judgement and make you probably want to attenuate all of the higher end frequencies which is a no-no
b] A good catch-basin EQ would be to leave the mid range frequencies flat, and to attenuate the lower and high ends (ex. if you had a 8 band graphic eq then)

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12345678 (Or something like a valley)

c] If you are wildly tuning your eq, attenuating or amplying frequencies greatly + or - individually or as a whole, then you will probably not get a very good sounding system. Remember that the EQ is not a volume switch, always start with a flat EQ, and if you don't like my suggestion in b].. then start with the middle frequencies and then the low end / top end (wildly adjusting is like a vicious cycle, you tune a particular frequency and then compensate with another frequency and then before you know it you end up with everything amplified or attenuated and it becomes a mess)

d] If you have a pioneer deck that doesn't have a graphic EQ, but has a simplified 3/4 band parametric, then it gets a little easier and trickier at the same time. I'm assuming you don't have this, reply to the thread if you do..

e] Don't spend more than 30-40min at any one sitting tuning your system, as you will usually start fatiguing at this point in time and trust me.. everything will sound the same and you will tune and tune and tune, wake up the next day and find out it doesn't sound very good.

f]I have a bunch of SPL tuning tracks (for a Subwoofer). For other stuff.. I usually just use a bunch of different tracks (jazz/classical/urban/pop) and it usually works for me.