The 1969 Triangles are the very first versions of the Big Muff. Originally they were built on perf board and there are several different versions in this series. I have gone through all of the different versions I have had the opportunity to trace out and this one is my favorite. These early pedals are a bit more scooped than later ones and they are made with part values that were never used again. The overall tone of the pedal is pretty balanced with just a little extra low end throughout and the fuzz has a huge, gnarly sound with a loose break-up in the fuzz on the lower strings.