In terms of function, the Jack Rabbit wins hands down over the Supa Trem, and is probably a wash with the Empress, as it has many additional useful features (tap/strum tempo, volume control, and more waveforms). In this case, the Jack Rabbit does NOT flatten the does not change it at all, really.just your sound, with trem. To be sure, the Empress had lots of great features, but in terms of sound the Supa Trem sounded better to my ears. Reaching back in my memory, the reason I traded the Empress away for the Supa Trem was because I thought (at least at the time) that the Empress 'flattened' the dry sound a bit, whereas the Supa Trem enhanced it. the Supa Trem.much easier to dial in tempos and depth on the Jack Rabbit. The controls on the Jack Rabbit are much less touchy vs. The Jack Rabbit, on the other hand, does not color the is just your sound, with trem. That being said, what it does sounds pretty good, to my ear. Regarding the comparison with the Supa Trem: I totally agree with Richard.the Supa Trem rounds out the sound, it is not transparent, and is not unity gain (it boosts just a little bit, but it does not have a volume control). The other two modes (ramp up, down) are very cool and I can see using them once in a while to add a unique texture here or there. The sine and square are more familiar (I rarely use the square wave). I love the triangle wave, especially, for some reason. As noted above, I am not super fond of comparisons because so many factors go into the end result (guitars, amps, ears, perception, etc.), so these observations are unique to my situation, YMMV, etc. I can also, if my memory serves me, sort of compare it to the Empress, which I had about 4 years ago before the Supa Trem.

I have also been putting it head to head with the SupaTrem, which I have had for about 4 years. Click to expand.OK folks, I've been playing with the Jack Rabbit for the last hour or so (picked one up at Mesa Boogie Hollywood earlier today).so take this for what it is worth (one hour of playing at home.not in a band context, gig levels, etc., etc.).

My first jack rabbit demo