Is there any difference to the sound produced? I'm a little concerned that the carpet may absorb a little of the sound - anyone got any comments on the pros/cons? If I go for down firing, are around 90mm legs enough for the DPL12? Also, has anyone got any info on the diameter of the Adire Audio DPL12 woofer cutout and mounting height? I need the cutout diameter, outside diameter, and depth of flange. Thanks.