[mayhem13]

Ah ha- thats they key-can we really here these artifacts in actual listening tests. A mic can hear and plot it but by the time the acoustics of our listening spaces are done adding their own colorations in far greater volumes, the actual issues produced by the system in question are overwhelmed. So in reality i guess what i'm saying is in our own listening spaces designs may have to be modified to cope with room modes which i have never bothered to measure or analyze. I must just be lucky for my main listening space is very open and no side walls to interact with standing waves. I had an older CV 15" sub that sounded pretty good in this space believe it or not. I've gotten my refurbished JL W713's and will start a build next month so this will be the test. No matter how i model them in a ported enclosure, i can't tame port air speed, compression or 1st resonance. I'm gonna feed then 2800w parallel and watch my windows swell at 18hz-122db-i doubt i'll hear anything from the ports (6" dual) above the drivers output but we will see. I bet if i turned my mains off i might catch a glimpse of something though.