I own both AR6 and AR7 speakers. The AR7 speakers sound better than my AR6 speakers in original configuration.
My AR6 speakers now have a crossover similar to the AR7. The AR6’s now have the combined attributes of both: openness and natual sound with a better (AR6) low end
To go the other direction (replace the original AR7 crossover with the original AR6 crossover) is a step backwards.
It is also very presumptuous to think that AR would place cost at the forefront of proper design and a well established reputation for sound reproduction accuracy and product quality, at least at the time of the AR7 introduction.
