i had a Phenol for some time, sold it, but keep looking at them when they come up for sale! i do like the sound and flexibility - there’s a lot to it, and the filters are quite nice, i think.
the issue for me was the output/mixer section. not only is the delay noisy as mentioned above, but the whole output section is noisy and digital hashy. i was especially annoyed by the fact that adjusting the levels and pans would result in audible zipper noises and other digital hash. it’s clearly a digital mixer (a design choice i don’t fully understand). when i asked Andrew about this issue, he said that he was aware of it and suggested that it could be addressed in a future firmware upgrade. i’m not aware that there ever was one.
improving gain through your patch is useful in getting maximum s/n ratio, but the noisy controls were a problem for me as i saw the phenol as an ideal, portable performance machine. not being able to grab a volume or pan knob for fear of introducing digital zippery bits seems a shame… of course, there are times when that’s just what you might want!
the voltage concept (bi-polar for everything) makes a lot of sense on it’s own, but could lead to some hassles if you want it to talk nicely with your Double Knot, or Serge or whatever.
i do keep looking at them when they come up, though…