Hi the power adapter for my mixer broke, and I need a new one (Alesis MultiMix 16 USB 2.0). However they don't make them anymore, so I'm looking for an alternate solution. It has two 18V outputs that go into the mixer. So I was wonder if it's possible to hook up two separate power adapters to it to make it work, or find 1 power adapter and split it. However, I don't know what the necessary specs would be to make this work. Here is a picture of the broken power adapter's label.
What would the circuit diagram look like for hooking up two supplies to a three prong adapter?
Here is what the end that plugs into the mixer looks like: