Hi all. I´m a new member here, and I´m not a native english speaker(I´m from Finland, North-Europe), so forgive, if my english is not perfect(and I know that it is not!). I´m a guitarist, and not very familiar with bass gear, but since my wife plays bass in our metal oriented band, and her english is even worse than mine, I have to post here. So, some time ago we bought an used SWR SM-400 head, I think that it´s a -91 model, the seller said so. I want to know is it possible to use it, for recording purposes, without connecting it to a cabinet? As you know, most of the amp manufacturers warns that you should not use their amps, without connecting it to a speakers. I noticed a mention on a SWRs websites, that it´s possible to use their heads, without a cabinet, via D.I output. Is this true also with the SM-400? Also, what means "underpowering"? I have heard that underpowering could damage your cab. We are going to buy an 8ohm Avatar 410Neo for SM-400, is it underpowering, since Avatar can handle 1200 watts, and SM-400 is 400 watts head?