NAD T770 owner manual Cassette Deck Control, Setting UP the Surround System, Speaker Selection

	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
GB	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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