Wampler ecstasy problem

[Lucas1448]

Hello, I build a wampler ecstasy/euphoria recently, it is awesome, it works right, all the pots and the switch work, it has good output volume etc... The thing is, there is like a bad clipping o bad frecuency in the sound, like if the signal wasn't being Properly Filtered. Is this normal? Any help would be much Appreciated.
Pd: I use the layout from the perf and pcb blog.