ELECTROVOICE BOSCH ID60DT COMPRESSION DRIVER

hey everybody in this video what I'd like to do is look closer at the feign CD 131 compression driver in the previous video this was one of four compression drivers that I had tested and I had mentioned how I had misplaced this one I had found it in my bedroom closet where I store some of my drivers anyway he's always trying to find a safe place to store stuff with kids and cats around so anyway so so what I wanted to do is look at the stock compression driver and also look at the one that I had modified by cutting the big hole in the back of it and looking at the difference that the hole makes and also with the adding of the foam and I can play some music too and have some other tests that I'm gonna do namely I'm gonna try to lower the resonance of the drivers that I can use it down to 600 Hertz for an audiophile type application so so I have my computer here my dots speaker tester tha