I know this is a very old thread. But the RTI 12 and it new version RTIA9 are still occasionally for sale and I want to share my experience with other who may consider them. I have had the RTI 12 for 6+ years. I originally believe many others about needing huge power. I originally ran it with 150w/channel @ 8ohn along a long side of a 19'X13' rectangular room. I couldn't get adequate amount of bass no matter where I moved the speakers given the limitations of other living room furniture. I had always wanted to get another amp with a few hundred watts output. Then I realized when I walked off to the kitchen that was 15 ft to the side, the bass, mids and highs were very balanced, just missing the clarity for the highs since I was so far off axis. I have since run the RTI in 3 more rooms and once with an amp with only 35 watt in a room 23'X23' and have had very satisfying and balanced bass vs highs. They sounded like whole different speakers all together. It is the space that was the problem for me. I tried other speakers in different rooms and the balance among bass, mid and high changes in every room.