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Bi-amping
If you are running a 5.1 (or less) speaker setup, the 651R/751R allows for
bi-amping of the front left and right channels. It will be seen in the Speaker
Configuration menu that with the Decode mode set as 5.1 a Bi-amp On/Off
item appears.
When selected, the 651R/751R sends the front left and right signals to the
SBL and SBR outputs as well.
In conjunction with bi-wireable/bi-ampable speakers this allows you to use
two runs of speaker cable to each speaker with a dedicated amplifier
channel for the bass and treble drivers of each speaker which can slightly
increase the sound quality.
See diagram below of a bi-amped system (only front left and right speakers
shown).
Note: Bi-wire links must be removed on the speaker’s terminals.
Tone/Sub/LFE configuration
Select the ‘Tone/Sub/LFE Menu’ from the main menu:
The Bass response can be adjusted +/- 10dB @ 100Hz (shelving). The Treble
response can be adjusted +/-10dB @ 10kHz (shelving).
The 651R/751R incorporates a couple of advanced Bass Management
features. The overall Sub Level for DD/DTS modes, Dolby Pro Logic
II/x/Neo:6 modes and Stereo + Sub mode can be set to different levels. This
can be useful if you prefer to have a high level of Sub operation whilst
watching movies but a lower level for music playback. The three levels are
simply adjusted by up to +/-10dB in the OSD. The second feature is that the
way Bass Management is applied can be changed.
In normal operation (Bass Augment Off) if the Front speakers are set to
‘Small’ (in the ‘Speaker Config’ menu) their bass is re-directed by high-pass
filtering the Fronts and sending that bass to the Sub channel (i.e. bass is
removed from the Fronts and sent to the Sub). If they are set to ‘Large’ no
filtering takes place and no bass is sent from them to the Sub channel.
However with the Bass Augment function On and the Front speakers set to
‘Large’, bass from the Front Left and Right is now sent to the Sub channel
without any filtering of the Front Left and Right taking place (i.e. these
channels remain full range). In other words, the bass in the Sub channel is
augmented by extra bass from the Front Left and Right channels. If the Front
Left and Right are set ‘Small’, Bass Augment has no effect and operation is
the same as for Bass Augment Off.
Bass Augment can be On or Off separately for DD/DTS or Dolby Pro Logic
II/IIx/Neo:6 operation.
There is no Bass Augment function for Stereo + Sub mode because in this
mode if the Front speakers are set to ‘Large’ they will actually always be
unfiltered.
Bass Augment can be a useful function with Dolby Pro Logic II/IIx and Neo:6
material because these encoding types do not include an LFE Channel. This
would normally mean that if all the speakers in your setup were set to ‘Large’,
the subwoofer would in fact be inactive (as no bass has been re-directed plus
there is no LFE channel). If it is desired to have the subwoofer running with
all Large Speakers and these encoding types, enable Bass Augment for
Dolby Pro Logic II/Neo6 and then set the Crossover points and levels by ear.
A Sub channel will now be created from the Front Left and Right channels
without filtering them. As with all adjustments it is a good idea to experiment
to determine what works best with your particular setup.
Note: These adjustments work in all digitally processed Stereo or Surround
modes but not in Analogue Stereo Direct or 7.1 Direct modes.
The LFE channel (for DD / DTS material) can also be trimmed by up to 10dB
in 1dB steps useful for late night listening or other situations where it might
be desired to reduce the low frequency effect level perhaps temporarily.
Remember the LFE is the Low Frequency Effects channel encoded into the
disc and is different to the over all sub level which can include bass
management from the other speakers.
Bass/Treble adjustments can also be made from the remote without
entering the OSD by pressing the Bass/Treble button and then using the Vol
Up/Down buttons.
Recording
The 651R/751R features two recorder outputs.
Recorder 1 features analogue audio, co-axial digital audio, composite and S-
Video outputs.
In all cases the 651R/751R does not convert between the formats, it merely
outputs the signals present at the corresponding inputs for the chosen
source.
The chosen source is simply the one that is being listened to via the
651R/751R main outputs.
Recorder 2 features analogue audio and co-axial digital audio outputs.
Again the 651R/751R does not convert between the formats, it merely
outputs the signals present at the corresponding inputs for the chosen
source.
Surr. L/R :
