OK you want weird tweaky gear
The first is called an EMT 156 compressor/limiter
this is a Pulse Width Modulation Mastering compressor that showed up in John Mellencamps studio in the mid eighties on someones suggestion.
At the time it was worth thousands of dollars and no matter how much I fucked with or re re read the manual, neither Don Gehman nor myself could make the thing do something that was worth keeping
I think in the end, it never worked correctly but we could never get Gotham Audio to give us any suggestions on how to see if it was actually broken.
One weird ass piece of gear
next is a piece of gear I still own but don't use much anymore
it is called a B.A.S.E.
Bedidini Audio Spatial Expander
This thing messed so much with phase, you had to make sure to check your use in mono because it would sound super cool wrapping around your head and then go away completely in mono
This was great for expanding reverb returns and making shit so wide it seemed to come out of the outer reaches of your speakers
Now for really messed up,
The Cyclosonics Tri Stereo Panner
This would make things go around and around or in figure 8's or back and forth in the stereo spectrum
Don Smith and I used this on a Eurythmics mix once and when it was taken in to master, the needle was jumping out of the groove and we had to remix half the record because of this box's ability to move the image but in those days if low end had a quotient to this sound the cutting head could not reproduce it
A very cool box though
by the same company that made the dyno my piano Rhodes chorus