Right this is kinda tricky to explain, im running my guitar through a korg multieffect and into a marshal mg series amp, my effects pedel has alot of excellent tones but they are all very warm and smooth and sound great for rythme however for lead some parts i want something with more pressence and harshness which i am current getting by using the fdd(frequency dependant damping) switch on my amp and basicaly i want a effects pedel that will have a similar effect so i can switch it on and off easily and plug into a more powerful amp any ideas?