I built a set of the A/V-3's about 8 months ago and absolutely love them. I recently acquired a Dynaco ST-70 Van Alstine modded tube amplifier and would like to give it a shot on a line array. I would like to know if the OB-7's would be a viable option for this low powered amp. I do have a second ST-70 if I needed on for each speaker, but it is not a Van Alstine, but is in the process of being modded. My theatre room doubles as a listening room and I would like to use the A/V-3s just for HT. The room is about 12'x20' with 8 foot ceilings.