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Originally Posted by ampegfuzz Does say hooking up 2 9v to a distortion or fuzz hurt a pedal? Does it do anything at all tone wise? Will it fry or do nothing? Just curious  |
Unfortunately, there is no fix rule. It depends on the pedal's circuits.
Often it depends by the maximum voltage that capacitors can take other times by the current that the higher voltage produces.
Some pedals have even overvoltage protection because the circuit can be damaged if the power supply voltage is higher than 12V or 15V.
If you are in doubt, I recommend you ask the pedal builder.
Sound wise, higher supply voltage is likely to increase the headroom. On distortion pedals is less likely because the clipping circuit usually limits the signal voltage.
I have been dealing with guitar players that swear blind that pedals powered at 12V or 18V sound better. Other people don't notice any difference.
Personally, if any of my pedals sounds better at more than 9V, I build a circuit what increases the internal voltage. In this way my customers don’t need a dedicated power supply and they can daisy chain the power supply with other pedals.