Regarding output, one way to look at it is that the EP600 is twice as loud as the EP500 which is twice as loud as the EP400.
A 10dB change in SPL is perceived as twice as loud.
When I compare the 350/400/500/600, their performance is only marginally differentiated. Why would anyone buy anything other than a 400 given the information in that graph? The 500/600 need to be more differentiated in my opinion.
Has anyone tried running dual 600W amps on their 600 ?
House of the Rising Sone Out in the mid or far field Dedicated mid-woofers are over-rated