GPA-400 : Power amp didn't work when it arrived

This is an update to the negative review that previously left. I'm leaving it below. The reason that the unit wasn't working was this it was not receiving the correct voltage. It is a European product and I live in the United States. After purchasing the correct transformer the unit worked great, I'm very happy with the unit. With that said, I do have some draw backs. I need the unit to fit in a rack. the unit itself does, but the transformer does not. So I have to keep the transformer outside of the rack. Eventually I will have to buy a deeper rack so the transformer will fit. It's an expense that I was not expecting, but considering the cost of the unit, it still makes sense. So just keep that in mind when buying this product.

(original review)

I received the GPA 100 yesterday. I hooked everything up and no sound is coming out of the unit. I've been writing customer service for 24 hours but I have not received a response. Very disappointing.