I have bought a Presonus HP4 from ebay. It was sold without an adapter. Apparently it is the old version and uses a 16VAC adapter rather than the new ones which uses 12VDC adapter. I found an 16VAC adapter on an online retailer but it is sold as an 600mA rather than 1A. Would it be a big problem for my Presonus HP4, or just the adapter will get hotter than usual?