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16. CASSETTE DECK CONTROL
(For use with single (DECK B) or double transport (A and B) NAD
Cassette Decks)
or engages Forward Play or Reverse Play.
Record / Pause. Press to put cassette deck into record-
pause. Press Play to start recording.
Stops Play or Recording.
engages Rewind.
engages Fast Forward.
NOTES: Direct sunlight or very bright ambient lighting may affect
the operating range and angle for the remote control handset.
The infrared remote control command receiver, located on the far
left of the display window, receives commands from the remote
control. There must be a clear line-of-sight path from the remote
control to this window; if that path is obstructed, the remote
control may not work.
SETTING UP THE SURROUND SYSTEM
To obtain the best results in any of the Surround Modes it is
important that the T770 is carefully set up. Performing the
complete setup is done using the On Screen Display menus. It is
therefore recommended you connect your television or monitor is
connected to the T770 monitor output.
Refer to the chapter “On Screen Display (OSD)” on how to access
the Main Menu of the On Screen Display, choose sub-menus and
change settings.
The setup procedure is broken down in three sections:
1. Speaker Selection
2. Speaker Distance
3. Level Calibration
SPEAKER SELECTION
First you need to indicate which speakers are connected to your
T770. These can include a Center, two Surround speakers and a
subwoofer, apart from the Left and Right speakers:
• Call up the Main menu of the On Screen Display (Fig. 6).
• Select the “Speaker A Menu” (Fig. 12).
• Choose the “Speaker Selection” submenu (Fig. 13).
• Choose “Center” and select one of the three modes available
appropriate to the T770’s setup: Small, Large, None.
The “Small” mode is used when the center speaker is smaller than
the front left and right speakers. This mode produces a true center
image with the very low frequencies (below 70 Hz) filtered out.
The “Large” mode is used when the center speaker is similar in
size and power handling as the front left and right speakers. This
mode produces a true center image with a full frequency range
and no low frequency filtering.
The “None” mode is used when there is no center speaker
installed. The T770 places the center information equally on the
left and right front speakers so producing a ‘Phantom’ central
sound image.
Using a separate center channel speaker will allow the dialogue to
cut through even the biggest sound effects and musical scores.
Having the sound spread across three front speakers also stabilises
the stereo image, making the usable listening area much bigger.
For best results, you should consider using a center speaker.
Ideally it should be the same type as the left and right speakers,
although there are now many new speakers, such as the NAD
808CC, which are specifically designed as center channel add-ons
for existing stereo systems.
• Choose “Sur.” and select “YES” if you do have surround
connected, “NO” if you don’t have surround speakers
connected.
Installing surround speakers will greatly enhance the surround
experience as these add considerably to the overall “ambience”.
Dolby Pro Logic encoded material is deliberately limited in
dynamic range and frequency bandwidth for the surround channel
and thus only requires speakers of far lesser specification
compared to the front channels. Dolby Digital however is a full
range system, with two independent surround channels and with
dynamics equal to that of the front channels. For this reason it is
advisable to choose loudspeakers which come close in power
handling and performance capability to those of the front channels.
For best results, the Surround loudspeakers should not beam the
sound directly at the listener. One way of achieving this is to use
‘dipole’ Surround speakers which aim the sound down the walls
rather than directly into the room.
• Choose “Subwf.” and select “YES” if you do have a subwoofer
connected, “NO” if not.
Many film soundtracks rely heavily on very low frequency sound
effects that are difficult for normal or smaller hi-fi speakers to
reproduce. To faithfully reproduce these low frequencies you can
use a specially designed low frequency loudspeaker with its own
built-in amplifier (“active subwoofer”). Because it is difficult to
hear which direction very low frequencies are coming from, you
only normally need one subwoofer and this can be placed virtually
anywhere in the room. The Subwoofer output of the T770 is
designed specifically to drive a sub-woofer system.
Dolby Digital uses a dedicated Low Frequency Effects (LFE)
channel. If a subwoofer has been selected, the LFE channel will be
fed to the subwoofer output.
SPEAKER DISTANCE
For the best surround sound performance it is important that
sound of all speakers reach the listener’s ears at the same time.
Because the Surround speakers are usually closer to the listener
than the Front speakers, there is a tendency for the ear to localise
sounds to the rear, because the ear takes most notice of the
sounds that arrive at the head first. Similarly, the Center speaker is
often closer to the listener than the Left and Right speakers.
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