Some over drive pedals allow you to use either a 9 volt or an 18 volt power supply. It's said that with using an 18 volt power supply, it's supposed to give you more headroom and a little bit more open sound and clarity.
I want to try this to see if it is actually in fact true. In this example, i'm going to use the catalinbread dirty little secret, which is kind of like a marshall jmp style overdrive, and i'm going to use a fulltone ocd.
What's interesting is that in both examples, i definitely heard a difference. The most obvious difference was with the dirty little secret. When I plugged in the 18 volt, it seemed like it was almost double the juice coming out of the pedal, so there was a lot more power, but it also really changed the eq on it.
It was definitely a little bit more open. It felt less like it had a blanket on it. A little bit more presence. A similar thing with the ocd, although I didn't feel like there was a power fluctuation, there was a little bit more clarity and presence to it.
It wasn't so much treble as it was bitey. Just there was a little bit more clarity and presence. Well, I don't know about you, but I definitely heard a difference.
The most obvious difference was with the dirty little secret. I noticed that when I plugged in the 18 volt power supply, it almost doubled the output of the pedal. So that was a pretty big give away.
But once I settled it down and kind of put it back to a similar level that it was with the 9 volt, I did definitely notice that it felt a little more open and there was a little more clarity to the sound..
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