CD
Speakers small.....Coaxial feed ,stereo bypass or upsample. There is no, or very little bass. In this mode there is no access to sub levels.
Speakers small, Analog feed, stereo bypass or upsample. Plenty of bass although sill no access to sub levels.
Shouldn't the 990, using coax, apply the use of sub? Shouldn't it be the same as for anolog?