<font color='#000000'>Hate to tell you, but the head gear is absolutely necessary!
Yes, they're easy to use, but you need a microphone (the one that came with your computer is adequate, or buy one that will plug into your sound card) and some sort of test signal, whether via a signal generator or a CD with test tones. Linkwitz has a good test CD for $20. That's what I use. See link at end of this post.
Basically, place the mic (plugged into your sound card) in your listening position, launch the spectrum analyzer, fire up the test tones, and watch what happens. You want the various tones to be as near the same dB level as possible. If using pink noise, you want the sort of fuzzy response curve you'll see to be as flat as possible (pink noise response curve is most useful above 200 hz or so -- good for finding midrange and high freq. irregularities).
I hasten to point out, however, that a spectrum analyzer is maybe more than you need. It's just kind of audio-geeky and fun if you like that sort of thing (I do). If you slowly sweep the bass frequencies from about 200 hz down to 20 hz (the Linkwitz CD has a track that does that), you'll HEAR the peaks & valleys in your bass response easily enough, and thus will be able to hear the results of your placement changes until the sound is as nearly uniform as you can get it. An analyzer will not tell you anything about where to put the speakers -- it's still trial & error.
Most of the software-based analyzers have instructions -- some more, some less. And you can download demos to try before buying. You can learn a lot just playing around with the demo.
Linkwitz test CD</font>
