[ This is a cross-post from jazzguitar.be ] I just got the 22500 a day ago so I can comment a bit on it. The Boomerang III is the looper I’ve used for years and landed on it after trying most of the other ones on the market at the time and feel it’s the best combo of size, features, usability, and sound quality. So, I do compare the 22500 to the Boomerang, just as a contrast, not because they are equivalent (the Boomerang is a $180 more), but because I think the Boomerang set the bar for a looping pedal. Both are made in the US and represent the top tier of loopers, IMO. Hardware The 22500 is the size of EH’s other pedals like the SMM w/ H, POG 2, Cathedral, etc. They packed lots of features into the face of it, with a focus on performance. It uses soft switches, which is very nice—long lasting and quiet. The two loop track switches are multifunction: press to record / overdub, double press to stop, hold to undo/redo. The Boomerang switches both click and creak (plastic) and they end up being quite noisy—drives me crazy. There is no MIDI sync and they included phantom power with an XLR jack so clearly this is aimed at solo performers and/or vocalists. One thing that is blowing my mind is that this pedal functions on a normal 9v power supply, with 240mA requirement. Most stereo pedals with lots of digital horsepower inside (Eventide pedals, Boomerang, Strymon) need lots of volts, AC, or big mA’s. The 22500 seems to give pristine signal quality and provide phantom power to a mic (though I’ve not tried w/ the mic). The Boomerang needs 9v AC, or 9v DC w/ 700mA! Like most EH pedals, it is a little rough cosmetically, but there is a hand-made charm to what they do, and I appreciate that. EH has the best service I’ve experience. IME They will fix any of their products, in a week, for $25 (includes shipping). Function I have mixed feelings here. They have done a great job on some things, and overcomplicated others. The good news is important performance functions are 1:1 w/ a button: record, overdub, undo, stop, stop all, reverse, & octave. The bad news is changing loop type is a little fiddly and is set for each loop. There is a little digital selection matrix you use with a turn / press encoder to set all the parameters for a loop: Locked / Free (ie. synced loops vs. independent), multiplier (if “Locked”), quantize (to the beat), and parallel / serial (simultaneous vs. sequential). If you change loop types often, there will be lots of knob twiddling, if not, then you will set it once and never again. The 22500 has an auto-multiply feature labelled inexplicably as “U” (“user”, maybe?) which sets it apart of the Infinity and gives the Boomerang strong competition. You can set a set multiplier so that loop B will be a multiple of loop A’s length, or you can set it to “U” to multiply automatically like the Boomerang. This is great news. (thanks for the headsup @celticelk) Loops automatically save to the SD card as you record them—no need to manually save—and you have 100 loop save locations (called “banks”). Erasing loops is a little tedious using the selection matrix. Saving loops is quite luxurious, since there is no saving on the Boomerang. There are built in rhythms on the SD card, and you can create your own (.wav files), which can be BPM-shifted without changing the pitch. I would like to reiterate they did a great job and making the pedal function like 2 small loopers, side by side, with minimal controls. The 1:1 controls, like the independent volumes, reverse, octave, and all the functions packed into the foot switches, are brilliant. Sound What goes in, comes out. Sounds wonderful, and in stereo. I wish the octave worked without time-shifting (low octave 1/2 time; high octave double time), but you can plan ahead for this. The rhythm time shift works fine with a short range of BMP shift, say 60BPM to 70BPM, but it obviously gets choppy if you go extreme, say 120 to 40. The Boomerang ($400ish) is still king of loopers with MIDI & ease of use. The 45000 comes close but is nearly $600 with the remote and would take up a whole pedalboard. The Infinity has the closest feature-match to the 22500, but at a much higher price, and a need to set your own multiplier ahead of time. There isn’t another looper that can touch the 22500 for size, sound quality, focus on performance, and price. I would highly recommend checking out the 22500 ($260ish) if you want to be able to save loops, only need 2 tracks, a simple / compact setup, and don’t care about MIDI sync. I suspect EH will sell a ton and I’m keeping mine.