Originally Posted by bbear
Before running the auto MCACC I wanted to mention that I have tried setting my fronts to SMALL and my sub to 'PLUS' but I still don't hear anything out of my sub.
Also, on the graphic on the front panel of the SC-68 it only shows front left and front right as being active.
Could this be a bug with the SC-68 where it doesn't split out the low frequency and send to the sub when you are using the COAX1 input?
Is there any point in trying to run MCACC if nothing is coming out of my sub at this point?
1st, thanks for the info on buying hi-rez files.
2nd, I confess to being confused.
to help, let's consider this: for 2 channel sources, for the sub to do anything, if you're fronts are set to Large, you'll need to add surround processing to convert 2.0 >> 5.1. if you are staying stereo sound, you'll need to 1) have fronts set to Small or Plus AND
not be in Pure Direct audio mode. if you're in Pure Direct, the sub won't produce bass because all the digital processing & bass mgmt is bypassed.
for the sub to work with 2 ch sources, you should either be in Direct for 2 channel reproduction (2.1), Auto Surround & either a surround mode or downsampled Stereo mode. At least it used to be downsampled stereo, if Stereo is straight stereo in the new receivers, then the sub may work differently than in previous models, but the key is don't use Pure Direct mode if you want the sub
also, check to see what crossover you set. if you set it to one of the low ones, like 50 hz, the music you're playing may not have bass as low as the crossover. for typical use, 80Hz is the suggested starting place that fits most speaker setups.
MCACC is independent of the input, doesn't matter.using
MCACC is a matter of taste. you can choose to use it or not, by selecting which preset to use, Symmetry, All Channels Adjust, Front Aligned, or Off.
when you select Pure Direct listening mode, most of the MCACC functions are turned off but not all. the ones we know are turned off are: the standing wave filter, phase control, EQ settings, speaker distances/delays. based on anecdotal evidence from a number of posters over the years, we believe the preamp output levels (channel levels & trim) are left on. we think this because the overall volume seems to change a bit in Pure Direct when you also select the MCACC preset (deactivates the channel output levels). in my case, the volume drops a bit, since nearly all my channels get a level boost in the calibration.
hope that makes sense.
your receiver should work in a logical way, consistent with how MCACC has worked for many years. a specific input (coax) should not effect at all how the bass management works. what will is the listening mode you're using, Auto Surround, Stereo, Direct & Pure Direct.
if you want 2.1 sound from a 2.0 source, meaning sub gets bass, then you're on the correct path. Set fronts to Small, set your initial crossover at 80, and don't use Pure Direct for stereo source. or you can add PLIIx, NeoX, THX and derive 5.1 from 2.0 because now, the bass from derived center & surrounds will also be sent to the sub.
did you hear test tones from the sub during your calibration? and...
do you hear the sub with 5.1 DVD/Blu-ray? you should since that is a dedicated LFE track + redirected bass.Edited by ss9001 - 1/22/13 at 5:27pm