The Reutz mod changes the capacitor and frequency response in the feedback loop. That is why it sounds different.PenPen wrote:But the design of that pedal is that the opamp feedback loop favors and amplifies the most a "hump" in the high-mids.
Let me try to explain this here. With the Rat, you have a band of frequencies that are favored and have the highest gain. These are in the upper-mids. As you keep turning up the gain, that hits a ceiling (there are limits to how much you can amplify before it hits the max). So those higher frequencies are the same level, but the lower end that previously wasn't as loud relative to the high end goes up, and they are eventually amped the same. Thus, it sounds like there is more low end as you turn up the gain.
Problem is, at this point you have overloaded the bandwidth of the OA, and everything starts to sound like a woofy mess. Normally this is good. BUT, when you roll out those high ends, you end up with a bunch of overloaded chip tone in the low end. Basically I'm saying the low end that is amped up sounds like shit. That pedal would do so much better with a tone knob that varies the cap in the feedback loop to change the fundamental response rather than a filter.
