Do you have the power brick on hand?
If so, there should be a label that says what the output is:
Yes, but:
- Make sure the barrel jack is the correct size
- Make sure it is the same polarity. Make sure they are identical (when the plus points at the center, your replacement should do the same) There is a symbol like this:
There may be a symbol like that near the barrel jack on the amplifier itself.
Looking at pictures of the device, it looks like 32V (earlier versions) to 36V (current version) 4.5A (Center Positive)
Reliable PSU makers:
- TDK Lambda
- Honeywell
- Meanwell