Assignable 7-Channel Amplifier: The T 748 is rated using NAD's Full
Disclosure Power; 40 watts continuous output x 7 channels with all channels
running simultaneously from 20-20,000 Hz into 8Ω loads with no more than
0.08% THD. The stereo output is 80 watts continuous x 2 channels under the
same conditions. The seven amplifier channels built into the receiver are
typically used for 7.2 channel surround in the main room, but there are various
amplifier configurations to accommodate your home theater setup.
- 7.1ch: Provides 7.1ch surround (with front left/right,
center-channel, surround left/right, and surround back left/right channels
along with a preamp subwoofer output) in your main zone.
- Bi-Amp: You can configure the amplifier for front
bi-amp operation to achieve a higher-quality 2-channel sound by connecting
the receiver's front and surround back channels to your main front speakers
(if compatible). In this configuration, the receiver will be limited to
- Zone 2: The surround back channel amplifier can be
reassigned to power stereo speakers in Zone 2. The receiver will be limited
to 5.2ch surround in the main zone.
Note: NAD uses Full Disclosure Power (FDP), the most demanding
criterion for performance measurement. FDP specifies distortion under the
most extreme conditions of low impedance loads and frequency extremes,
rather than the simple and easy 1kHz @ 8 ohms test quoted by many of other
manufacturers. NAD uses this stricter performance criterion because it more
closely matches the demands of real music and real loudspeakers. Maintaining
specified distortion at 4/8Ω and at 20-20kHz is a much more difficult
achievement. The benefit of NAD's Full Disclosure Power is the total
elimination of audible distortion at any listening level. This provides
pinpoint imaging and realism with music and movies alike.
Auto Calibration: The auto setup and calibration feature
uses the included microphone, along with sophisticated digital electronics to
automatically setup and calibrate the T 748 to the exact speakers and speaker
placement of your unique home theater. The receiver automatically checks what
speakers are connected, measures and adjusts each speaker's distance (delay
time), relative level (volume), and size (crossover point). The speakers can
also be adjusted manually if you prefer.
Listening Modes: The T 748 offers decoding for all the
latest surround formats including Dolby Digital, Dolby TrueHD, Dolby Digital
Plus, DTS, and DTS-HD Master Audio; as well as Dolby Pro Logic surround
- Dolby Digital:
Dolby, Digital EX,
Dolby Digital Plus,
DTS-HD Master Audio,
DTS-HD High Resolution,
DTS Neo: 6
- Dolby Pro Logic:
Dolby Pro Logic II,
Dolby Pro Logic IIx
Note: Dolby Digital and DTS listening modes can only be
selected if your audio source is connected to the A/V receiver via a digital
audio connection (HDMI, optical, or coaxial). To enjoy true 7.1ch Dolby
Digital TrueHD and DTS-HD surround sound, the receiver must be connected to
your Blu-ray player via HDMI.
Listening Mode Parameters: The T 748 provides the following
Listening Mode Parameter adjustments for Dolby Pro Logic IIx and DTS NEO:6.
- Center Width (DPL IIx): Modifies the
"hard-centeredness" of the center image, by gradually mixing mono center
content to the Front left/right speakers as well. A setting of 0 retains the
center-channel-only default while a setting of 7 yields a fully phantom
- Dimension (DPL IIx): Adjusts front-rear emphasis of the
surround effect independently from the relative channel levels.
- Panorama (DPL IIx): Adds a "wraparound" effect by
extending some stereo content into the surround channels.
- Center Gain (DTS NEO:6): Adjust for better center image
in relation to the surround sound channels.
EARS: Two-channel recordings, whether stereo or
surround-encoded, are reproduced with proprietary NAD surround processing with
signals output to the front left/right, center and discrete left/right surround
channels, plus subwoofer. EARS extracts the natural ambience present in nearly
all well-produced stereo recordings. It does not synthesize any ambience or
other sonic elements and thus remains truer to the sound of the original musical
performance than most other music-surround options. EARS offers realistic,
stable "front-stage" sonic imaging and spacious but unexaggerated ambient
"virtual acoustics" that remain faithful to the original recording. Select EARS
for listening to stereo music recordings and broadcasts. EARS produces a subtle
but highly natural and believable ambience from nearly all "natural-acoustic"
stereo recordings. Typically, these include classical, jazz, and folk genre.
Stereo Modes: The NAD T 748 also provides two-channel stereo and
multi-channel stereo playback, as well as an analog bypass stereo mode.
- Stereo: All output is directed to the front left/right channels.
Low frequencies are directed to the subwoofer if one is present in the
Speaker settings. Select 'Stereo' when you wish to listen to a stereo (or
monaural) production, such as music CD or FM broadcast, without surround
enhancement. Stereo recordings whether in PCM/digital or analog form and
whether surround-encoded or not encoded, are reproduced as recorded.
Multi-channel digital recordings (Dolby Digital and DTS) are reproduced in
"Stereo Downmix" mode via the front left/right channels.
- Enhanced Stereo: All recordings are reproduced in stereo via the
maximum speaker complement. Enhanced stereo can be useful for maximum volume
from all channels or for multi-speaker background music (cocktail party)
listening. For this mode, Front, Center, Surround and Back speakers can be
turned ON/OFF as desired.
- Analog Bypass: All analog signals remain in the analog domain
without analog-to-digital conversions. At Analog Bypass, the DSP circuitry
is bypassed but full tone control functions remain. 'Bass management' or
Speaker settings are also not in effect as these are DSP functions.
Audio Settings: The NAD T 748 offers a variety of audio
adjustments to tailor the unit to your preference.
- Tone Controls: Bass & Treble can be adjusted from -10dB
- Enhanced Bass: When the subwoofer is set to 'On' and
your front speakers set to 'Large', the option 'Enhanced Bass' becomes
available. Normally, with speakers set to 'Large' the subwoofer is not
active. The Enhanced Bass option allows full range operation of the speakers
with the additional bass contribution of the subwoofer. This feature is
particularly useful when one wants to experience maximum bass output.
- Dynamic Range Control: You can select the effective
dynamic range (subjective range from soft to loud) for playback of Dolby
Digital soundtracks. For fully cinematic effect, always select 100% (the
default). Settings of 75%, 50%, and 25% progressively reduce dynamic range,
making soft sounds comparatively louder while limiting the peak loudness of
- Gain Adjustment: Gain adjustment allows all sources to
play back at the same volume level so you don't need to adjust the volume
every time a new source is selected. It is generally preferable to reduce
the level of the loudest source rather than making louder the softer
Audio Inputs/Outputs: The NAD T 748 offers a variety of
analog and digital audio inputs/outputs.
- Analog Inputs/Output: There are four analog audio
inputs (3 rear/1 front) and one record output. There are three stereo RCA
inputs and stereo RCA output on the rear-panel, plus a single 3.5mm stereo minijack
input on the front panel.
- Digital Inputs: There are two coaxial digital inputs
and three optical digital inputs (2 rear/1 front)). The inputs accept digital audio
signals from a digital TV, Set top box, Blu-ray player, compact disc, DVD, LD,
or other digital source components; each can be assigned to a specific source
using the on-screen menu.
- 7.2ch Preamp Outputs: The T 748 features Front left, Front right,
Center, Surround left, Surround right, Surround Back left, Surround Back right
and Subwoofer preamp outputs to connect the receiver to external power amplifiers.
The Surround Back preamp outputs can also be used for Zone 2.
- Speaker Terminals: The receiver has binding post speaker
terminals for the front, center, surround, and surround back channels. The
surround back speaker channels can also be used for Zone 2 speakers. The
binding posts can accept bare wire, pin connectors, and single banana plugs.
The terminals are spaced too far apart for dual banana plugs and a collar
surrounding the terminals prevents the use of spade connectors.
- Headphone Output: The receiver features a 1/4" stereo
headphone jack on the front-panel for connecting an optional pair of headphones.
The unit's speaker outputs are automatically muted when a set of headphones is
HDMI Inputs/Output: The NAD T 748 receiver is fitted with
four HDMI (v.1.4) inputs and 1 HDMI (v.1.4) output to deliver crystal-clear,
all-digital audio and video signals. The HDMI 1.4 jacks support 1080p video
signals; as well as 3D video, Auto Lyp-Sinc, and ARC functionality. The AV
receiver's HDMI jacks support 2-channel and multi-channel linear PCM (up to
8-channel) and Bitstream (Dolby Digital, DTS, etc) digital audio formats.
- ARC (Audio Return Channel): HDMI (1.4) also features an
Audio Return Channel, which allows both audio and video content to be sent
through a single HDMI cable. This eliminates the need for separate audio and
video cables running from your TV to the receiver.
- 3D Pass-Through: With the advent of 3D media, it is important
to own a receiver that passes 3D video signals. The T 748 is able to pass 3D signals
from your Blu-ray player to your TV via the HDMI connection.
- HDMI Pass-through: When the T 748 is in standby
mode (power off), the HDMI source signals will continuously pass
through the receiver to the TV. The HDMI Control (CEC) feature must be enabled in order for HDMI Pass-through to work.
- Lip Sync Delay: Video signals may take longer to process
than audio signals, depending on the connected video equipment. The audio signal
can be delayed up to 120ms to synchronize with the video signal.
Analog Video Inputs: The T
748 offers Component, Composite, and S-Video inputs. These analog video
inputs can be assigned to specific sources using the on-screen menu. There is
one component video input. There are three composite
video inputs (2 rear/1 front) and one composite video monitor output. There are
two S-video inputs (1 front/1 rear).
Video Conversion: The T 748 takes each analog video input
(composite video, S-video, and component video), digitizes it and sends it out
through the HDMI monitor output (the S-Video input is also output through the
composite video monitor output).
On-Screen Menu: The AV receiver's on-screen text-based menu
provides quick information about your system's settings. You can easily make
settings for your home theater system while viewing menus on the TV screen.
These menu displays can be output to your TV via HDMI, Component, Composite, or
Zone 2: The Zone 2 feature allows you to set this receiver
to reproduce separate analog input sources in the main zone and the second zone
(Zone 2). The receiver has dedicated stereo RCA outputs for Zone 2, or the
receiver's Surround Back channels can be configured to power speakers in the
second zone. By using the RCA outputs on the AV receiver you can connect
an external receiver or integrated amplifier in a second room, allowing you to
listen to 7.1ch surround in the main room and play a different stereo audio
source in another room of your home. By using the speaker-level outputs on the
AV receiver you can directly connect a secondary pair of speakers in another
room of your home, allowing you to listen to 5.1 surround sound in your main
room and play a different stereo audio source in the other room. When the
receiver is powering speakers in Zone 2, the surround back speakers in the main
room are turned off (limiting you to 5.1ch in the main room). The volume of Zone
2 can be controlled by the NAD receiver using either configuration or from
your add-on integrated amplifier when using the line-output.
- Compatible Zone Sources: Analog audio inputs, AM/FM
Tuner (you cannot select different AM/FM radio stations for each zone)
- Incompatible Zone Sources: Optical/coaxial digital and
HDMI audio sources are not output to Zone 2. You cannot output any video
signal to Zone 2.
RDS AM/FM Tuner: The NAD T 748 features an internal AM/FM tuner
that offers high-quality sound from your local radio broadcasts. You can store
up to 30 FM and 30 AM station presets. The Radio Data System (RDS) permits
sending small amounts of digital information using conventional FM radio
broadcasts. The T 777 supports two RDS modes; Program-Service Name (PS mode) and
Radio-Text (RT mode). Not every FM station incorporates RDS in its broadcast
signal. In most areas you will find from one to several RDS-enabled stations,
but it is by no means impossible that your favorite stations will not be
broadcasting RDS data.
A/V Presets: Five A/V presets can be stored with customized
settings for listening mode, DSP options (lip sync delay), tone control, speaker
setup, and front panel display.
Optional iPod Dock: The optional IPD 2 iPod dock is no
Auto Power Down: The T 748 can be setup to automatically go to standby
mode if there is no user interface interaction within the allocated time (4hrs,
8hrs, or 30 mins).
Dual Remotes: The T 748 includes an IR remote (AVR 4) for
wireless operation of the AV receiver and other NAD audio/video components. The
included Zone 2 IR remote (ZR 7) controls the Zone 2 features of the T 748; it
allows control of the Zone 2 volume and source selection, as well as other
applicable functions. The ZR 7 remote will work from a different room using an IR
sensor and hub, or the IR sensor of a compatible NAD component in the second
zone (either must be wired back to the location of the T 748).
HDMI-CEC: The NAD AV receiver supports the HDMI control function,
which allows you to operate external components via HDMI. If your TV or other
external components support HDMI control, you can use the remote controls of
those devices to operate some of this unit's functions, and to synchronize this
unit with the operation of those devices. You can use the following operations
with the remote control of any of the connected HDMI Control compatible devices.
- Power synchronization (On/Standby)
- Volume control, including Mute
- Changing the volume of the audio output signal device (either the TV or
Remote Connections: The NAD T 748 is fitted with the
following custom remote inputs/outputs.
- IR In: The 3.5mm IR In allows you to connect the T 748 to an
- RS-232C: The RS-232C port is to be used in conjunction with
an external controller; AMX, Crestron or a compatible PC using NAD's proprietary
Switched AC: The maximum output on the 2-prong switched AC
outlet on the rear panel is 100 watts/1 amp.