Okay. this is a real honest review. took the pedal down to rehearsal for a head to head with my current favorite, a General Guitar Gadgets ITS8 clone.
to be fair, the Od-308 is a terrificly smooth overdrive. good high end. can work wonders with dark amps i reckon. but it didn't hold ground next to the ITS8. on the ITS8, the low end was ballsier, and the low mids were chunkier. hi-mid and treble were roughly the same, but with a bit more bite on the OD-308 . not something i like however
from what i've found, this is a good overdrive for all styles. doesn't dish out the br00talz enough for my metal band though. it's still a definitely useful studio tool. on its own at lower levels it's a good pedal. at high levels for heavy metal, it doesn't have the low end my ITS8 build has. which is strange, i was expecting the complete opposite.
i'll give it an 7.5/10. good allrounder for a clean amp looking for low volume drive.... and i do say drive, not distortion, although the pedal has lots of drive available.
but if you have a pedal you're quite happy with and you're looking for more low end and chunk, look elsewhere, or keep yours!
quite the fun build however :D