What is the difference between the POW 172.2 and POW 160.2/POW16+?

The difference between the systems is in the tweeter: the POW 172.2 is equipped with a 25 mm aluminum dome tweeter with a cable crossover WITHOUT level adjustment. The POW 160.2 is equipped with a 25 mm fabric tweeter with a cable crossover WITH level adjustment. The POW 16+ has a 28 mm fabric tweeter in the size of a 25 mm tweeter in the set, incl. cable crossover WITH level adjustment.