Hi, I install a v3 black matrix a couple of years ago and tried a number of inputs, airport express, iPhone and blu Ray. And they all had a low gain on the matrix. I tried to adjust the gain on the matrix and still couldn’t get much volume out of the speakers. I have installed another matrix a couple of months ago. We came across the same thing. If we use optical in then the volume. Is fine. We then got a call from another Cbus installer and they was asking the same thing about the volume out. Is this a known problem or is there something we need to change. Thanks