I am looking to buy a pair and when i look at reviews i dont understand what the charts are showing. Is there a link where i can read to explain it or what can you guys tell me? Also how important are the charts? I know the best this is to audition them but i would like to know what im looking when i look at the charts. Also i hear alot about crossover points. DOes that matter when i do my speaker calibration. Will i need to adjust those or does it do it when i do my speaker calibration. Thanks.