Originally Posted by J Real
What, if any, is the advantage of using 4 ohm system over 8 ohm system?
There are so many different examples to consider that global conclusions are hard to make.
It is true that all other things being equal a 4 ohm driver will accept more power from a given SS power amp than an 8 ohm driver. The problem: finding all other things being equal! ;-)
There seems to have been a shift towards lower impedance drivers and speaker systems over the past 40 years, probably due to the shift from tubed amps with output transformers that matched impedances to SS amps that are transformerless and don't match impedance but deliver more power to low impedance loads.