You mean one for left another right? You might get away with that. IF you mean stacking pairs As long as you had the same pair on the bottom with the same pair inverted on the top, why not. I would look up the tech specs published by JBL and examine the crossovers to see if there are any real differences. If the circuits for the tweeters are different, then they aren't going to match up well. It would be like using a Hartsfields. with one in the two way mode and the other with a different woofer and an added super tweeter. Close but no cigar.