I'm using the Model 1 sig. with a velodyne hgs 12 subwoofer. The sound is incredible. I would switch to the Mani-2 if my pair for pass labs aleph 3 would drive them. these are low power amps with a very addictive sweet sound. the alephs have enough power to drive the Models 1 to high levels but I don't think they would be able to drive the mani-2 very well. i will not give up the aleph amp for more powerful amp to drive a pair of mani-2. I run the model 1's full range with no cross over to the sub. I am happy with the intergration of the sub. i know the mani-2 have better bass but I think the imaging and the sweet midrange are similar between the two(since they use the same tweeter and similar bass units). i'm not a big bass guy but the sevo velodyne works for me. I would stick with what you have and get a sub if you want the lowest bass, but the mani-2 sounds like it does not need a sub. one thing that I would like to know is that since the mani-2 are have goob bass reproduction, is it sensitve to position. I only ask because a position that has the best bass response is not always the best position for imaging (a good reason for a sub that can be place at a different postion than the speakers).
Tony
Tony