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Verified Customer zZounds has verified that this reviewer made a purchase from us.

I powered up my Mackie Big Knob Studio Plus and noticed the input LEDs were lit up despite nothing being plugged into the input section. After some online research, I came across a helpful video. Since I'm only using it to control my speakers and not as a sound card, disconnecting the USB port from the motherboard resolved the issue for me. I'm hoping Mackie will address this issue because this unit is only 2 1/2 years old and I use it every day. With the USB disconnected I can no longer multitrack with it but now the unit gets very hot and at times it starts to make really funny noises and I have to shut it down constantly. I take really good care of all of my equipment and this is the only equipment that is failing on me which is sad because I really love Mackie products, but unfortunately this is a real problem.

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Verified Customer zZounds has verified that this reviewer made a purchase from us.

Only last two years My Mackie big knob studio plus just gave out today I really liked it for the compatibility of what I was using it for my Mac Pro 2009 desktop I heard a pop and then it was done unable to get any sound threw it at all

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Verified Customer zZounds has verified that this reviewer made a purchase from us.

I've had this replaced twice in the past 2 years. The 3rd one just died. DO NOT BUY THIS PRODUCT.