The Gardy Loo is a treble booster/overdriven/fuzz hybrid. Designed to give similar breakup characteristics to a small tweed amp or Vox style chime.
Knobs control the gain and to a certain extent the bias of two germanium transistors. While covering similar grounf you will hear subtle differences if the frist transistor is cranked and the second low than when doing the opposite.
The Switch on the side switched between full range and treble modes. In Treble mode the Gardy functions similarly to a Rangemaster but on steroids. Try out a neck humbucker/P90 with gain dialled back a bit on the guitar and up full on the pedal.
In Full range mode you can get more overdriven tones, vintage and contemporary. Think neil Young's cranked tweed amp sounds, Wilco, post rock aggression and even a bit of stonesy rythm.
The Gardy is sensitive to changes in pickups and volume at the guitar. The best sounds will be got by having it work in sympathy with your setup. Rather than overtaking your tone and forcing a single sound.
£115