u r compairing speakers which belong to different class n different price range..
JBL937: Under 4k good SQ little less bass
Pioneer 6992s : around 4k Shity SQ with bass n bass so ppl here love them very much bcz ppl dont want quality here they just want bass
kenwood 718: around 6k. normal SQ with a bit over highs. but at around 6k its not worth the money ppl pay for it
Infinity kappa or ref : around 9,10 k,, dayum good SQ.. everything balanced and are hell clear.. Cant be compared to any of the above