No efficient is not the key ,it is the quality of the drivers ,
the quality of the crossover, as well as the cabinet design .
i owneda Audio store and some of the most efficient we’re actually some of the worst when put under a complex load .
the sum of the total as is mentioned means the most .
for example a Accuton ceramic driver has lessmoving mass
then a paper cone and far less distortion , but because of its magnetic structure ,voice coil ,spider not as efficient to drive .
also much more expensive to make.
the quality of the crossover, as well as the cabinet design .
i owneda Audio store and some of the most efficient we’re actually some of the worst when put under a complex load .
the sum of the total as is mentioned means the most .
for example a Accuton ceramic driver has lessmoving mass
then a paper cone and far less distortion , but because of its magnetic structure ,voice coil ,spider not as efficient to drive .
also much more expensive to make.