In my previous post HERE I showed how I’d turned a Behringer RM600 Reverb Machine from useless to great. After multiple requests; here is the schematic that I used for my switching and mixing sections:
As you can see I used a Super Hard On for the PreGain circuit and to buffer up the front of my mixer, three other opamp buffers are then used to isolate various parts of the signal chain with the final op amp being used to provide a stable 1/2 V bias point. Series low pass filters on the output of the reverb line help to greatly soften any noise produced by the reverb circuit (Which is running 100% wet). By running the preGain control high and using the two mix controls effectively there is basically no increase in noise while using the circuit at all (A great improvement). I’m very happy using this circuit for other projects as well, I’ll be using it on a Behringer EM600 Echo Machine in the future. Have fun using this while rehousing all those bargain pedals into super cool (USEABLE!) effects 🙂