Originally Posted by Knight7m
Recently I purchased 105D player, I found the sound of Blu Ray movies close to vinyl's, which is outstanding.
I'm connecting the audio from L/R fronts of 7.1 channel outputs directly to my Krell Phantom II preamp after I deselect all other channels, its process LFE channel which I want it because im listening only to two speakers. However, I wonder is it best connection or should I use the dedicate stereo?
Also is there other setting I need to tweak for optimal SQ. And thank you for answering.
Originally Posted by patchesj
Ideally you would use the dedicated L/R outputs (RCA or XLR) for optimum 2 channel listening. However, I've been told that the LFE channel on any ".1" recording will NOT be mixed back into those outputs. It will only be available on the L/R outputs as part of the 7.1 output set.
You can use the Dedicated L/R outs in exactly the same way you use the LF/RF outs of the multi-channel Analog set by configuring the Dedicated L/R outs to respond to all the configuration settings that apply to those LF/RF outs. The setting is Stereo Signal FRONT LEFT/RIGHT.
(If you want the Dedicated L/R outs to operate independently of those settings the setting is Stereo Signal DOWN-MIXED STEREO.)
As mentioned, in the independent configuration (Stereo Signal DOWN-MIXED STEREO), the LFE channel of a multi-channel track -- the .1 of 5.1 or 7.1 -- is not included in the down-mix. This is done quite deliberately as including the LFE in the down-mix requires a substantial additional "down-mix attenuation" for the L/R outs which effectively raises their noise floor.
When you use LF/RF alone from the multi-channel set -- or the Dedicated L/R with Stereo Signal DOWN-MIXED STEREO selected -- the LFE content from multi-channel tracks *WILL* be included in the down-mix if you have the Sub out set to OFF. This is true whether the down-mix is selected to Stereo in the Speaker Configuration > Down-Mix setting (a separate setting from the Stereo Signal setting) or if you'v achieved the same thing by manually turning off all the other speaker outs and the Sub out. Indeed, when you select Speaker Configuration > Down-Mix > STEREO, a side effect is that the Subwoofer output is switched to OFF.
However, you can get the same style of down-mix on the LF/RF outs that is applied to the independently configured L/R outs by (1) setting the LF/RF outs to LARGE so no Crossover happens, and (2) turning the Subwoofer back ON after selecting the Down-Mix STEREO. The LF/RF outs will get full frequency range output, and, if you play a multi-channel track, the LFE content will be discarded out the un-wired Subwoofer jack.
This is how I would set things up for Stereo Analog output in the 105 or 105D:
1) Set Stereo Signal FRONT/LEFT RIGHT.
2) In the multi-channel Speaker Configuration, set all speakers to OFF, except for LF/RF set to LARGE. Then set Down-Mix to STEREO. Then, as the last step, go back and turn the Subwoofer back to ON.
3) Wire the Dedicated L/R pair instead of the LF/RF pair. You can use either the RCA or the XLR pair for this.
Note that the Crossover setting is ignored since the only active speakers (LF/RF) are set to LARGE.
When playing Stereo content, all the output will go out the Dedicated L/R jacks.
When playing multi-channel content, all the output of the normal speaker channels will be down-mixed into the Dedicate L/R outs, and any LFE channel content will be discarded.
Folks who mix multi-channel movie tracks put plenty of bass in the normal speaker channels, so I think you will like this better than including LFE in the down-mix and having to compensate for the substantial increase in down-mix attenuation. And indeed, folks who mix multi-channel music tracks frequently put NOTHING in the LFE channel. All their bass is in the normal speaker channels. I.e., their 5.1 or 7.1 track is effectively 5.0 or 7.0 because the .1 channel is silent.