I just got a new Mirage BPS-400 "this thing is HUGE" to replace my Velodyne CT120 in a Small room 12/14. The Question is when I use the LFX input on the Mirage it sounds great but.... no control over volume or crossover. But when I use a Y cable for the left and right inputs I must turn the volume on the back to at least "5" to get the same sound output. The velodyne I had the volume turned to "5" and the LP filter set to 120Hz and used my Yamaha 795a's crossover to send everything below 90Hz to the Velodyne and it sounded fine. All speakers set to small and sub to yes. The question is the Velodyne was only 120 watts....(yes I know that ported design give more output) and the Mirage is 400 watts. I just thought that if I used the left and right inputs the same way as I was with the Velodyne I would not have to turn the volume on the Mirage up as high as the velodyne was.