Originally Posted by Warpdrv
Good lord Josh, I thought I was bad.... sorry to hear about the XXX, and I thought they were indestructible....
Hey I was beginning to think they were too.
Bosso had mentioned something about alien adhesives being used back long ago... Apparently after exposure to our earthly atmospheric conditions it will degrade over time. Seriously though this driver had been through the ringer so many times I'm surprised it was still alive anyway.
Here is the signal that got input which is below the port tuning.
Can't think of any sub that is going to survive that coming clipped out of a 4kw bridged pro amp.
Here's what happened. I had mistakenly assumed that I wouldn't need a hpf for this cab since it was tuned to 11hz and the tests would only be from 10hz up. What I didn't count on was that every program I was using to generate the compression and FR sweeps still starts the sweep down near 1-2hz even if only measuring from 10hz up, so all of that crazy below tuning sine content was limiting the compression sweep levels prematurely for this cab. I was trying to quickly rig up as low of a hpf in the DCX2496 as I could on the fly with various EQ functions and I had one down around 12hz worked up. I wanted it closer to 10hz as I was chopping off the low end a little prematurely so I was attempting to work towards that. Lets just say it involved a monumental amount of 20hz shelving boost combined with a Butterworth 48db octave hpf at 20hz, etc...Somehow I switched the 48db BW hpf to 24db on accident and it produced the purple trace in the above graph where what I had been using was similar to the green one. Started a sweep off and bbbbffffffFFFFF...whump...whuMP...WHUMP...WHUMP
Anyway I did work up an effective 12.5hz Butterworth 24db octave hpf with about 4 filters in the end.