A great tool to help you with results of positioning in your space is a Sound Pressure Level Meter. Amazon.
put on tripod, listening position, seated ear hight, see how balanced the range of tones are. move the speakers, listen, then run the test tones, see the results.
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combined with a test CD with test tones.
I have this one, got lucky, bought long time ago when affordable, very pricey now.
tracks 9-38 1/3 octave test tones.
you want specific individual tones, not sweeping tones.
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OTHERS: what CDs are good for test tones????