I own a Spider IV HD150 and use it with a Line 6 4 x 12 Cabinet. I want to get a 2 x 12 cabinet for the HD150 and would like to know what specs I need to look for before buying one.   1) How many watts should it be (Min/Max) 2) What should the Ohms be? 3) I have 2 line out that plug into my current 4x12 line 6 cab. I see that most 2x12 I look at if not all only have 1 input. How would I use that with the HD150? Do I only plug 1 of the output lines into the new 2x12 cab and not use the other?