I'm using 4 M1Ti's with a VP50 and an EP125 with a Harmon/Kardon AV120 in my 20x20 listening area. The manual for my receiver says for speakers that can reproduce sound below 100mhz use the speaker setting large. Since the M1's go down to 70, should I be using them in large or small? Also, should be sub be as close to the listening position as the front speakers? I have the sub at a phase of 0, switched to video and the volume set at half. It seems that I can't really hear the sub, is that poor setup, or is the sub underpowered? If it's setup wrong, could someone give me an idea what the sub settings should be at? Thank you VERY much for your feedback!