Hello Acoustic Image users, I bought Clarus S4 and have a question. My bass is Fodera and it has 18V pre-amp with EMG active pick-up. When I tryed to use Clarus, even though level was not so high, the sound was not clear but distortion occured. I cannot find imput level down switch for active pick-up bass on this product, how I can get 'clean tone' with my Fodera? I know when Fodera's master volume is turn down, I can get clean tone, but I want to use without bass guitar's volume turn down. Or, Do I have to insert a resistance in the circuit of amp?