Since 9V AC adaptor rating is 9Vrms and it comes to ~12V p-p, I figured 12V DC may not be too far from this rating. So, I went ahead and connected 12V DC/1A to MT882. It works like charm :yahoo:, even with my invertor supply of ~200V AC. The performance is very stable (over the last 12 hours) compared to the same with the 9V AC adaptor. Summary: One could buy a 12V DC/1A adaptor from a corner store and use it with MT882.:thumbsup: